Tokyo Institute of Technology   Department of Electrical and Electronic Engineering, Graduate School of Engineering   Associate Professor

2007.4 - 2015.3

Tokyo Institute of Technology   Department of Electrical and Electronic Engineering, Graduate School of Science and Engineering   Associate Professor

2000.4 - 2007.3

Tokyo Institute of Technology   Department of Electrical and Electronic Engineering, School of Engineering   Associate Professor

1996.4 - 2000.3

Chalmers University of Technology   Post Doctral Fellow

1994.9 - 1995.8

Tokyo Institute of Technology   Department of Electrical and Electronic Engineering, School of Engineering   Research Associate

1990.4 - 1996.3

Difference-Beam Operation in a Center-Fed Dual-Polarized Parallel-Plate Waveguide Slot Array Antenna Reviewed

Huanqian Xiong, Jiro Hirokawa, Takashi Tomura

IEICE Communications Express   13 ( 9 )   359 - 362   2024.9

Wavelet OFDM Wireless Communication System for Autonomous Underwater Vehicles Using Loop-Shaped Antennas in Underwater Environments Reviewed

Ryosuke Hasaba, Kazuhiro Eguchi, Toshiyuki Wakisaka, Jiro Hirokawa, Miyuki Hirose, Tohlu Matsushima, Yuki Fukumoto, Yuya Nishida, Kazuo Ishii

IEEE Access   12   129633 - 129645   2024.9

Cylindrical Scattered Field Transformation Applicable for Differences in the Radar Ranges of Transmitter and Receiver—Far-Field Prediction Reviewed

Yoshihiko Akamine, Takashi Tomura, Jiro Hirokawa

IEEE Transactions on Antennas and Propagation   72 ( 6 )   5212 - 5222   2024.6

Effective Design of an Array of Coupling Slots With a Reflection-Canceling Wall for a Parallel-Plate Slot Array Antenna Reviewed

Tianyu Wang, Takashi Tomura, Jiro Hirokawa

IEEE Access   12   87479 - 87488   2024.5

High‐gain tapered monopulse antenna based on octuple excitation method in diffusion bonding technology at W‐band

Adham Mahmoud, Takashi Tomura, Mauro Ettorre, David González‐Ovejero, Ronan Sauleau, Jiro Hirokawa

IET Microwaves, Antennas & Propagation   18 ( 5 )   317 - 330   2024.3

Two‐plane waveguide coupler with arbitrary coupling ratios in the H‐plane and E‐plane directions

Qi Li, Jiro Hirokawa, Takashi Tomura

IET Microwaves, Antennas & Propagation   17 ( 10 )   818 - 826   2023.7

X-band grating-loaded parallel-plate slot array antenna with low reflection

Shuang Ji, Jiro Hirokawa, Takashi Tomura, Hirobumi Saito

IEICE Communications Express   12 ( 6 )   277 - 281   2023.6

Analysis of Wind Effect on Drone Relay Communications Reviewed

Yuya Tajima, Takefumi Hiraguri, Takahiro Matsuda, Tetsuro Imai, Jiro Hirokawa, Hiroyuki Shimizu, Tomotaka Kimura, Kazuki Maruta

Drones   7 ( 3 )   2023.3

Experimental Study of Wavelet-OFDM Radio Communication System for AUVs Under Seawater

Ryosuke Hasaba, Kazuhiro Eguchi, Toshiyuki Wakisaka, Hiroshi Satoh, Jiro Hirokawa, Miyuki Hirose, Tohlu Matsushima, Yuki Fukumoto, Yuya Nishida, Kazuo Ishii

2023 17TH EUROPEAN CONFERENCE ON ANTENNAS AND PROPAGATION, EUCAP   2023

Design for Operation in Two Frequency Bands by Division of the Coupled Region in a Waveguide 2-Plane Coupler

Shihao Chen, Takashi Tomura, Jiro Hirokawa, Kota Ito, Mizuki Suga, Yushi Shirato, Daisei Uchida, Naoki Kita

IEICE Transactions on Electronics   ( 12 )   729 - 739   2022.12

Control of Radiation Direction in an Aperture Array Excited by a Waveguide 2-Plane Hybrid Coupler

Yuki SUNAGUCHI, Takashi TOMURA, Jiro HIROKAWA

IEICE Transactions on Communications   E105.B ( 8 )   906 - 912   2022.8

Short-range transmission improvement by dog-bone cross-slot feed in radial line slot antenna

Tuchjuta Ruckkwaen, Takashi Tomura, Jiro Hirokawa

IEICE Communications Express   11 ( 6 )   257 - 262   2022.6

Design of the Circularly Polarized Ring Microstrip Antenna with Shorting Pins

Jun Goto, Akimichi Hirota, Kyosuke Mochizuki, Satoshi Yamaguchi, Kazunari Kihira, Toru Takahashi, Hideo Sumiyoshi, Masataka Otsuka, Naofumi Yoneda, Jiro Hirokawa

IEICE TRANSACTIONS ON COMMUNICATIONS   E105B ( 1 )   34 - 43   2022.1

Millimeter-Wave Multiplexed Wideband Wireless Link Using Rectangular-Coordinate Orthogonal Multiplexing (ROM) Antennas International coauthorship

Takashi Tomura, Jiro Hirokawa, Muhsin Ali, Guillermo Carpintero

JOURNAL OF LIGHTWAVE TECHNOLOGY   39 ( 24 )   7821 - 7830   2021.12

Realization of a Beam-Tilted Circularly Polarized Corporate-Fed Waveguide Slot Array in the 60 GHz Band International coauthorship

Miao Zhang, So Matsueda, Jiro Hirokawa, Makoto Ando

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   69 ( 12 )   8967 - 8972   2021.12

Transmission Characteristics Control of 120 GHz-Band Bandstop Filter by Coupling Alignment-Free Lattice Pattern

Akihiko Hirata, Koichiro Itakura, Taiki Higashimoto, Yuta Uemura, Tadao Nagatsuma, Takashi Tomura, Jiro Hirokawa, Norihiko Sekine, Issei Watanabe, Akifumi Kasamatsu

IEICE TRANSACTIONS ON ELECTRONICS   E104C ( 10 )   587 - 595   2021.10

A Wideband Circularly Polarized Corporate-Fed Waveguide Aperture Array in the 60 GHz Band International coauthorship

Miao Zhang, Tatsuya Yamamoto, Jiro Hirokawa, Makoto Ando

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS   20 ( 9 )   1824 - 1828   2021.9

Design of the Traveling-Wave Series-Fed Microstrip Antenna Array with Power Control Slits of Unequal Inter-Element Spacing

Jun Goto, Makoto Matsuki, Takashi Maruyama, Toru Fukasawa, Naofumi Yoneda, Jiro Hirokawa

IEICE TRANSACTIONS ON COMMUNICATIONS   E104B ( 6 )   624 - 629   2021.6

Millimeter-Wave Huygens' Transmit Arrays Based on Coupled Metallic Resonators International coauthorship

Soichi Sakurai, Joao G. Nizer Rahmeier, Takashi Tomura, Jiro Hirokawa, Shulabh Gupta

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   69 ( 5 )   2686 - 2696   2021.5

Control of 120-GHz-Band Split Ring Resonator Filter by Coupling Lattice Pattern Substrate

Koichiro Itakura, Akihiko Hirata, Masato Sonoda, Taiki Higashimoto, Tadao Nagatsuma, Takashi Tomura, Jiro Hirokawa, Norihiko Sekine, Issei Watanabe, Akifumi Kasamatsu

IEICE TRANSACTIONS ON ELECTRONICS   E104C ( 3 )   102 - 111   2021.3

Simultaneous Generation of Three OAM Modes by Using a RLSA Fed by a Waveguide Circuit for 60 GHz-band Radiative Near-field Region OAM Multiplexing International coauthorship

Xin Xu, Agnese Mazzinghi, Angelo Freni, Jiro Hirokawa

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   69 ( 3 )   1249 - 1259   2021.3

All-Dielectric Fabry-Perot-Based Compound Huygens' Structure for Millimeter-Wave Beamforming International coauthorship

Mohamed K. Emara, Takashi Tomura, Jiro Hirokawa, Shulabh Gupta

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   69 ( 1 )   273 - 285   2021.1

Anisotropic Conductivity Measurements by Two Kinds of Multimode Rectangular Plate-Laminated Cavities

Takashi Tomura, Jiro Hirokawa

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES   69 ( 1 )   170 - 178   2021.1

Realization of a Wideband Series-Fed 4 x 4-Element Waveguide Slot Array in the X-Band International coauthorship

Jiyu He, Yaxiang Wu, Dan Chen, Miao Zhang, Jiro Hirokawa, Qinghuo Liu

IEEE ACCESS   9   83666 - 83675   2021

Eight-Port Feed Radial Line Slot Antenna for Wireless Power Transmission

Takashi Tomura, Jiro Hirokawa, Minoru Furukawa, Teruo Fujiwara, Naoki Shinohara

IEEE Open Journal of Antennas and Propagation   2   170 - 180   2021

Analysis of Intersymbol Interference Characterized by the Large Array Antennas Adopted in a 60-GHz-Band Gigabit Compact-Range Wireless Access System International coauthorship

Miao Zhang, Masahiro Wakasa, Koji Toyosaki, Kiyomichi Araki, Jiro Hirokawa, Makoto Ando

IEEE ACCESS   9   80077 - 80087   2021

Improvement of isolation between transmitting and receiving antennas of E-plane arranged waveguide slot arrays by using layers of slit pairs with half-wavelength spacing

Kohei Jitosho, Takashi Tomura, Jiro Hirokawa

IEICE COMMUNICATIONS EXPRESS   10 ( 2 )   93 - 98   2021

Experimental Evaluation of Intersymbol Interference in Non-Far Region Transmission using a Large Array Antenna in the Millimeter-Wave Band

Tuchjuta Ruckkwaen, Takashi Tomura, Kiyomichi Araki, Jiro Hirokawa, Makoto Ando

IEICE TRANSACTIONS ON COMMUNICATIONS   E103B ( 10 )   1136 - 1146   2020.10

Fabry-Perot-Based Compound All-Dielectric Huygens' Structure for Circularly Polarized Millimeter-Wave Beamforming International coauthorship

Mohamed K. Emara, Takashi Tomura, Jiro Hirokawa, Shulabh Gupta

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS   19 ( 10 )   1784 - 1788   2020.10

Dual-Polarized 2-D Beam Mode Orthogonal Multiplexing Antenna System for the Nonfar Region

Kentaro Wada, Takashi Tomura, Jiro Hirokawa

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   68 ( 9 )   6614 - 6623   2020.9

Sidelobe Suppression in Both the E and H Planes Using Slit Layers over a Corporate-Feed Waveguide Slot Array Antenna Consisting of 2x2-Element Radiating Units

Haruka Arakawa, Takashi Tomura, Jiro Hirokawa

IEICE TRANSACTIONS ON COMMUNICATIONS   E103B ( 9 )   960 - 968   2020.9

A 38 dB Gain, Low-Loss, Flat Array Antenna for 320-400 GHz Enabled by Silicon-on-Insulator Micromachining International coauthorship

Adrian Gomez-Torrent, Takashi Tomura, Wataru Kuramoto, Jiro Hirokawa, Issei Watanabe, Akifumi Kasamatsu, Joachim Oberhammer

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   68 ( 6 )   4450 - 4458   2020.6

Transmission Enhancement in Rectangular-Coordinate Orthogonal Multiplexing by Excitation Optimization of Slot Arrays for a Given Distance in the Non-Far Region Communication

Ryotaro Ohashi, Takashi Tomura, Jiro Hirokawa

IEICE TRANSACTIONS ON COMMUNICATIONS   E103B ( 2 )   130 - 138   2020.2

8 x 2-Element 60-GHz-Band Circularly Polarized Post-Wall Waveguide Slot Array Antenna Loaded With Dipoles

Takashi Tomura, Yuta Saito, Jiro Hirokawa

IEEE ACCESS   8   85950 - 85957   2020

Novel Unmanned Aerial Vehicle-Based Line-of-Sight MIMO Configuration Independent of Transmitted Distance Using Millimeter Wave

Naoki Matsumura, Kentaro Nishimori, Ryotaro Taniguchi, Takefumi Hiraguri, Takashi Tomura, Jiro Hirokawa

IEEE ACCESS   8   11679 - 11691   2020

Laser-Drilled All-Dielectric Huygens' Transmit-Arrays as 120 GHz Band Beamformers International coauthorship

Mohamed K. Emara, Sonya K. Stuhec-Leonard, Takashi Tomura, Jiro Hirokawa, Shulabh Gupta

IEEE ACCESS   8   153815 - 153825   2020

A Four-Corner-Fed Slotted Waveguide Sparse Array for Near-Field Focusing International coauthorship

Yaxiang Wu, Bolin Jiang, Miao Zhang, Jiro Hirokawa, Qing Huo Liu

IEEE ACCESS   8   203048 - 203057   2020

Development and Performance Evaluation of Small SAR System for 100-kg Class Satellite

Budhaditya Pyne, Hirobumi Saito, Prilando Riziki Akbar, Jiro Hirokawa, Takashi Tomura, Koji Tanaka

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing   13   3879 - 3891   2020

12-and 21-GHz Dual-Band Dual-Circularly Polarized Offset Parabolic Reflector Antenna Fed by Microstrip Antenna Arrays for Satellite Broadcasting Reception

Masafumi Nagasaka, Masaaki Kojima, Hisashi Sujikai, Jiro Hirokawa

IEICE TRANSACTIONS ON COMMUNICATIONS   E102B ( 7 )   1323 - 1333   2019.7

Suppression of E-Plane Sidelobes Using a Double Slit Layer in a Corporate-Feed Waveguide Slot Array Antenna Consisting of 2 x 2-Element Radiating Units

Haruka Arakawa, Hisanori Irie, Takashi Tomura, Jiro Hirokawa

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   67 ( 6 )   3743 - 3751   2019.6

Wideband Design of a Short-Slot 2-Plane Coupler by the Mode Matching/FEM Hybrid Analysis Considering the Structural Symmetry

Masahiro Wakasa, Dong-Hun Kim, Takashi Tomura, Jiro Hirokawa

IEICE TRANSACTIONS ON COMMUNICATIONS   E102B ( 5 )   1019 - 1026   2019.5

Fabrication and Evaluation of Integrated Photonic Array-Antenna System for RoF Based Remote Antenna Beam Forming

Takayoshi Hirasawa, Shigeyuki Akiba, Jiro Hirokawa, Makoto Ando

IEICE TRANSACTIONS ON ELECTRONICS   E102C ( 3 )   235 - 242   2019.3

Robust Contactless Noncircular Choke Flange for Wideband Waveguide Applications

Budhaditya Pyne, Ryohei Naruse, Hirobumi Saito, Jiro Hirokawa, Vinay Ravindra, Prilando Riziki Akbar

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES   67 ( 3 )   861 - 867   2019.3

A PCB-Integratable Metal Cap Slot Antenna for 60-GHz Band Mobile Terminals

Takashi Tomura, Haruhisa Hirayama, Jiro Hirokawa

IEICE TRANSACTIONS ON COMMUNICATIONS   E102B ( 2 )   317 - 323   2019.2

Special Section on Recent Progress in Antennas and Propagation in Conjunction with Main Topics of ISAP2017 FOREWORD International coauthorship

Monai Krairiksh, Jiro Hirokawa

IEICE TRANSACTIONS ON COMMUNICATIONS   E102B ( 2 )   165 - 165   2019.2

Perpendicular-Corporate Feed in a Four-Layer Circularly-Polarized Parallel-Plate Slot Array

Hisanori Irie, Takashi Tomura, Jiro Hirokawa

IEICE TRANSACTIONS ON COMMUNICATIONS   E102B ( 1 )   137 - 146   2019.1

A 20-GHz-Band 64 x 64 Hollow Waveguide Two-Dimensional Butler Matrix

Takashi Tomura, Dong-Hun Kim, Masahiro Wakasa, Yuki Sunaguchi, Jiro Hirokawa, Kentaro Nishimori

IEEE ACCESS   7   164080 - 164088   2019

Analysis and Design of a Wideband Endfire Circularly Polarized Septum Antenna International coauthorship

Xiaohe Cheng, Yuan Yao, Jiro Hirokawa, Takashi Tomura, Tao Yu, Junsheng Yu, Xiaodong Chen

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   66 ( 11 )   5783 - 5793   2018.11

Performance Analysis and Hardware Verification of Feature Detection Using Cyclostationarity in OFDM Signal

Akihide Nagamine, Kanshiro Kashiki, Fumio Watanabe, Jiro Hirokawa

IEICE TRANSACTIONS ON COMMUNICATIONS   E101B ( 10 )   2142 - 2151   2018.10

Photonics-Based Millimeter-Wave Band Remote Beamforming of Array-Antenna Integrated With Photodiode Using Variable Optical Delay Line and Attenuator

Tatsuya Nagayama, Shigeyuki Akiba, Takashi Tomura, Jiro Hirokawa

JOURNAL OF LIGHTWAVE TECHNOLOGY   36 ( 19 )   4416 - 4422   2018.10

Wideband Waveguide Short-Slot 2-Plane Coupler Using Frequency Shift of Propagating Modes

Dong-Hun Kim, Jiro Hirokawa, Makoto Ando

IEICE TRANSACTIONS ON ELECTRONICS   E101C ( 10 )   815 - 821   2018.10

Absorber Integrated Planar Slot Array Antenna for Suppression of Multiple Reflection in 120-GHz-Band Close-Proximity Wireless System

Akihiko Hirata, Jiro Hirokawa

IEICE TRANSACTIONS ON ELECTRONICS   E101C ( 10 )   791 - 800   2018.10

Millimeter-Wave Multibeam Endfire Dual-Circularly Polarized Antenna Array for 5G Wireless Applications International coauthorship

Qi Wu, Jiro Hirokawa, Jiexi Yin, Chen Yu, Haiming Wang, Wei Hong

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   66 ( 9 )   4930 - 4935   2018.9

FUTURE 5G MILLIMETER-WAVE SYSTEMS AND TERMINALS: PROPAGATION CHANNEL, COMMUNICATION TECHNIQUES, DEVICES, AND MEASUREMENTS International coauthorship

Pablo Padilla, Jiro Hirokawa, Lars J. Foged, Juha Ala-Laurinaho, Damir Senic, Astrid Algaba-Brazalez, Ahmed Hussain, Juan F. Valenzuela-Valdes

IEEE COMMUNICATIONS MAGAZINE   56 ( 7 )   12 - 13   2018.7

Slot-Array Antenna Feeder Network for Space-Borne X-Band Synthetic Aperture Radar

Budhaditya Pyne, Prilando Rizki Akbar, Vinay Ravindra, Hirobumi Saito, Jiro Hirokawa, Tomoya Fukami

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   66 ( 7 )   3463 - 3474   2018.7

Multiplexing Antenna System in the Non-Far Region Exploiting Two-dimensional Beam Mode Orthogonality in the Rectangular Coordinate System Reviewed

Karim Tekkouk, Jiro Hirokawa, Makoto Ando

IEEE Transactions on Antennas and Propagation   66 ( 3 )   1507 - 1515   2018.3

Special Section on Recent Progress in Antennas and Propagation in Conjunction with Main Topics of ISAP2016 FOREWORD

Jiro Hirokawa

IEICE TRANSACTIONS ON COMMUNICATIONS   E101B ( 2 )   261 - 261   2018.2

Millimeter-Wave Frequency Beam Scanning Array with a Phase Shifter Based on Substrate-Integrated-Waveguide

Xiaohe Cheng, Yuan Yao, Takashi Tomura, Jiro Hirokawa, Tao Yu, Junsheng Yu, Xiaodong Chen

IEEE ACCESS   6   47408 - 47414   2018

A Compact Multi-Beam End-Fire Circularly Polarized Septum Antenna Array for Millimeter-Wave Applications

Xiaohe Cheng, Yuan Yao, Takashi Tomura, Jiro Hirokawa, Tao Yu, Junsheng Yu, Xiaodong Chen

IEEE ACCESS   6   62784 - 62792   2018

A TM010 Cavity Power-Combiner with Microstrip Line Inputs

Vinay Ravindra, Hirobumi Saito, Jiro Hirokawa, Miao Zhang, Atsushi Tomiki

IEICE TRANSACTIONS ON ELECTRONICS   E100C ( 12 )   1087 - 1096   2017.12

Millimeter-Wave Planar Broadband Circularly Polarized Antenna Array Using Stacked Curl Elements Reviewed

Qi Wu, Jiro Hirokawa, Jiexi Yin, Chen Yu, Haiming Wang, Wei Hong

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   65 ( 12 )   7052 - 7062   2017.12

Perpendicular-Corporate Feed in Three-Layered Parallel-Plate Radiating-Slot Array Reviewed

Hisanori Irie, Jiro Hirokawa

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   65 ( 11 )   5829 - 5836   2017.11

60 GHz-band photonic-integrated array-Antenna and module for radio-over-fiber-based beam forming Reviewed

Kotoko Furuya, Takayoshi Hirasawa, Masayuki Oishi, Shigeyuki Akiba, Jiro Hirokawa, Makoto Ando

IEICE Transactions on Communications   E100B ( 10 )   1717 - 1725   2017.10

One-Body 2-D Beam-Switching Butler Matrix with Waveguide Short-Slot 2-Plane Couplers

Dong-Hun Kim, Jiro Hirokawa, Makoto Ando

IEICE TRANSACTIONS ON ELECTRONICS   E100C ( 10 )   884 - 892   2017.10

Wideband and Large Coverage Continuous Beam Steering Antenna in the 60-GHz Band Reviewed

Karim Tekkouk, Jiro Hirokawa, Ronan Sauleau, Makoto Ando

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   65 ( 9 )   4418 - 4426   2017.9

Recent Technologies in Japan on Array Antennas for Wireless Systems Reviewed

Jiro Hirokawa, Qiang Chen, Mitoshi Fujimoto, Ryo Yamaguchi

IEICE TRANSACTIONS ON COMMUNICATIONS   E100B ( 9 )   1644 - 1652   2017.9

Compact X-Band Synthetic Aperture Radar for 100 kg Class Satellite Reviewed

Hirobumi Saito, Prilando Rizki Akbar, Hiromi Watanabe, Vinay Ravindra, Jiro Hirokawa, Kenji Ura, Pyne Budhaditya

IEICE TRANSACTIONS ON COMMUNICATIONS   E100B ( 9 )   1653 - 1660   2017.9

A Dual-Polarization X-Band Traveling-Wave Antenna Panel for Small-Satellite Synthetic Aperture Radar Reviewed

Vinay Ravindra, Prilando Rizki Akbar, Miao Zhang, Jiro Hirokawa, Hirobumi Saito, Akira Oyama

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   65 ( 5 )   2144 - 2156   2017.5

Plate-Laminated Waveguide Monopulse Slot Array Antenna with Full-Corporate-Feed in the E-Band Reviewed

Xin Xu, Jiro Hirokawa, Makoto Ando

IEICE TRANSACTIONS ON COMMUNICATIONS   E100B ( 4 )   575 - 585   2017.4

Alignment Control System Using Beam-Tilting 1-D Waveguide-Slot Array Antennas for 120-GHz-Band Corporate-Feed High-Gain 2-D Arrays Reviewed

Akihiko Hiratat, Jun Takeuchi, Keisuke Hashimoto, Jiro Hirokawa

IEICE TRANSACTIONS ON COMMUNICATIONS   E100B ( 1 )   158 - 166   2017.1

Stability of coaxial cable transmission and measurement system using optical fiber link technologies Reviewed

Yuanfeng She, Michitaka Ameya, Masanobu Hirose, Satoru Kurokawa, Jiro Hirokawa, Makoto Ando

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS   59 ( 1 )   201 - 204   2017.1

Corporate-Feed Slotted Waveguide Array Antenna in the 350-GHz Band by Silicon Process

Tekkouk, Karim, Hirokawa, Jiro, Oogimoto, Kazuki, Nagatsuma, Tadao, Seto, Hiroyuki, Inoue, Yoshiyuki, Saito, Mikiko

Ieee Transactions on Antennas and Propagation   65 ( 1 )   217 - 225   2017

E-Band Plate-Laminated Waveguide Filters and Their Integration Into a Corporate-Feed Slot Array Antenna With Diffusion Bonding Technology Reviewed

Xin Xu, Miao Zhang, Jiro Hirokawa, Makoto Ando

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES   64 ( 11 )   3592 - 3603   2016.11

3.5-Gbit/s QPSK Signal Radio-Over-Fiber Transmission With 60-GHz Integrated Photonic Array-Antenna Beam Forming Reviewed

Masayuki Oishi, Takayoshi Hirasawa, Kotoko Furuya, Shigeyuki Akiba, Jiro Hirokawa, Makoto Ando

JOURNAL OF LIGHTWAVE TECHNOLOGY   34 ( 20 )   4758 - 4764   2016.10

Parallel-Plate Slot Array Antenna for Deployable SAR Antenna Onboard Small Satellite Reviewed

Prilando Rizki Akbar, Hirobumi Saito, Miao Zhang, Jiro Hirokawa, Makoto Ando

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   64 ( 5 )   1661 - 1671   2016.5

A Four-Corner-Fed Double-Layer Waveguide Slot Array With Low Sidelobes Developed for a 40 GHz-Band DDD System Reviewed

Miao Zhang, Jiro Hirokawa, Makoto Ando

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   64 ( 5 )   2005 - 2010   2016.5

Design of Waveguide Short-Slot Two-Plane Couplers for One-Body 2-D Beam-Switching Butler Matrix Application Reviewed

Dong-Hun Kim, Jiro Hirokawa, Makoto Ando

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES   64 ( 3 )   776 - 784   2016.3

A 12 x 16-Element Double-Layer Corporate-Feed Waveguide Slot Array Antenna Reviewed

Satoshi Ito, Miao Zhang, Jiro Hirokawa, Makoto Ando

IEICE TRANSACTIONS ON COMMUNICATIONS   E99B ( 1 )   40 - 47   2016.1

A 60 GHz-Band High-Efficiency Antenna with a Thick Resin Layer and Differentially Fed through a Hole in a Silicon Chip Reviewed

Naoya Oikawa, Jiro Hirokawa, Hiroshi Nakano, Yasutake Hirachi, Hiroshi Isono, Atsushi Ishii, Makoto Ando

IEICE TRANSACTIONS ON COMMUNICATIONS   E99B ( 1 )   27 - 32   2016.1

Practical considerations of terahertz communications for short distance applications

Nagatsuma, Tadao, Oogimoto, Kazuki, Inubushi, Yuki, Hirokawa, Jiro

Nano Communication Networks   10   1 - 12   2016

LTCC Oversized Rectangular Waveguide Slot Array Antenna With Air Layers Reviewed

Yuanfeng She, Jiro Hirokawa, Makoto Ando, Daisuke Hanatani, Masahiro Fujimoto

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   63 ( 12 )   5850 - 5854   2015.12

Design of mm-Wave RLSAs with Lossy Waveguides by Slot Coupling Control Techniques Reviewed

Tung Nguyen, Jiro Hirokawa, Makoto Ando, Manuel Sierra Castaner

IEICE TRANSACTIONS ON COMMUNICATIONS   E98B ( 9 )   1865 - 1872   2015.9

Dual-Layer Ridged Waveguide Slot Array Fed by a Butler Matrix With Sidelobe Control in the 60-GHz Band Reviewed

Karim Tekkouk, Jiro Hirokawa, Ronan Sauleau, Mauro Ettorre, Makoto Sano, Makoto Ando

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   63 ( 9 )   3857 - 3867   2015.9

Influence of the SMA connector and its modeling on electromagnetic simulation Reviewed

Takuichi Hirano, Jiro Hirokawa, Makoto Ando

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS   57 ( 9 )   2168 - 2171   2015.9

Reconstruction of the Field Distribution on Slot Array Antennas Using the Gerchberg-Papoulis Algorithm Reviewed

Makoto Sano, Manuel Sierra-Castaner, Tamara Salmeron-Ruiz, Jiro Hirokawa, Makoto Ando

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   63 ( 8 )   3441 - 3451   2015.8

A 60-GHz Band Compact-Range Gigabit Wireless Access System Using Large Array Antennas Reviewed

Miao Zhang, Koji Toyosaki, Jiro Hirokawa, Makoto Ando, Toru Taniguchi, Makoto Noda

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   63 ( 8 )   3432 - 3440   2015.8

Rain Sensing Using Dual-Frequency Measurements from Small-Scale Millimeter-Wave Network Reviewed

Hung V. Le, Capsoni Carlo, Nebuloni Roberto, Luini Lorenzo, Takuichi Hirano, Toru Taniguchi, Jiro Hirokawa, Makoto Ando

IEICE TRANSACTIONS ON COMMUNICATIONS   E98B ( 6 )   1040 - 1049   2015.6

The effect of intraoperative continuous infusion of low dose glucose on ketogenesis and postoperative insulin resistance

Hirokawa, Jun, Sako, Saori, Koyama, Sayuri, Tsukamoto, Masanori, Yokoyama, Takeshi

Acta Anaesthesiologica Scandinavica   59   52 - 52   2015

Single-Layer Corporate-Feed Slot Array in the 60-GHz Band Using Hollow Rectangular Coaxial Lines Reviewed

Makoto Sano, Jiro Hirokawa, Makoto Ando

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   62 ( 10 )   5068 - 5076   2014.10

A Simple Through-Hole Based Transformer between Microstrip Line and Post-Wall Waveguide for Millimeter-Wave Applications Reviewed

Yusuke Uemichi, Ryouhei Hosono, Ning Guan, Jiro Hirokawa, Makoto Ando

IEICE TRANSACTIONS ON ELECTRONICS   E97C ( 10 )   941 - 947   2014.10

A 45 degrees Linearly Polarized Hollow-Waveguide 16 x 16-Slot Array Antenna Covering 71-86 GHz Band Reviewed

Takashi Tomura, Jiro Hirokawa, Takuichi Hirano, Makoto Ando

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   62 ( 10 )   5061 - 5067   2014.10

Errors in Shortened Far-Field Gain Measurement Due to Mutual Coupling Reviewed

Takuichi Hirano, Jiro Hirokawa, Makoto Ando

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   62 ( 10 )   5386 - 5388   2014.10

Phased Array Antenna Beam Steering Scheme for Future Wireless Access Systems Using Radio-over-Fiber Technique Reviewed

Masayuki Oishi, Yoshihiro Nishikawa, Kosuke Nishimura, Keiji Tanaka, Shigeyuki Akiba, Jiro Hirokawa, Makoto Ando

IEICE TRANSACTIONS ON COMMUNICATIONS   E97B ( 7 )   1281 - 1289   2014.7

Design and Fabrication of a Dual-Polarization Waveguide Slot Array Antenna With High Isolation and High Antenna Efficiency for the 60 GHz Band Reviewed

Dongjin Kim, Miao Zhang, Jiro Hirokawa, Makoto Ando

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   62 ( 6 )   3019 - 3027   2014.6

Propagation Characteristics of Honeycomb Structures Used in mm-Wave Radial Line Slot Antennas Reviewed

Tung Nguyen, Rushanthi Jayawardene, Kimio Sakurai, Jiro Hirokawa, Makoto Ando, Manuel Sierra Castaner, Osamu Amano, Shuichi Koreeda, Takaomi Matsuzaki, Yukio Kamata

IEICE TRANSACTIONS ON COMMUNICATIONS   E97B ( 6 )   1139 - 1147   2014.6

Millimeter-Wave Propagation Characteristics and Localized Rain Effects in a Small-Scale University Campus Network in Tokyo Reviewed

Hung V. Le, Hasan Md Mohibul, Takuichi Hirano, Toru Taniguchi, Akira Yamaguchi, Jiro Hirokawa, Makoto Ando

IEICE TRANSACTIONS ON COMMUNICATIONS   E97B ( 5 )   1012 - 1021   2014.5

A Wideband 16 x 16-Element Corporate-Feed Hollow-Waveguide Slot Array Antenna in the 60-GHz Band Reviewed

Takashi Tomura, Jiro Hirokawa, Takuichi Hirano, Makoto Ando

IEICE TRANSACTIONS ON COMMUNICATIONS   E97B ( 4 )   798 - 806   2014.4

64 x 64-Element and 32 x 32-Element Slot Array Antennas Using Double-Layer Hollow-Waveguide Corporate-Feed in the 120 GHz Band Reviewed

Dongjin Kim, Jiro Hirokawa, Makoto Ando, Jun Takeuchi, Akihiko Hirata

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   62 ( 3 )   1507 - 1512   2014.3

A Partially-Corporate Feed Double-Layer Waveguide Slot Array with the Sub-Arrays also Fed in Alternating-Phases Reviewed

Miao Zhang, Jiro Hirokawa, Makoto Ando

IEICE TRANSACTIONS ON COMMUNICATIONS   E97B ( 2 )   469 - 475   2014.2

Double-Layer Plate-Laminated Waveguide Slot Array Antennas for a 39 GHz Band Fixed Wireless Access System Reviewed

Miao Zhang, Jiro Hirokawa, Makoto Ando

IEICE TRANSACTIONS ON COMMUNICATIONS   E97B ( 1 )   122 - 128   2014.1

4 x 4-Element Corporate-Feed Waveguide Slot Array Antenna With Cavities for the 120 GHz-Band Reviewed

Dongjin Kim, Jiro Hirokawa, Makoto Ando, Jun Takeuchi, Akihiko Hirata

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   61 ( 12 )   5968 - 5975   2013.12

Manufacture and Performance of a 60 GHz-Band High-Efficiency Antenna with a Thick Resin Layer and the Feed through a Hole in a Silicon Chip Reviewed

Jun Asano, Jiro Hirokawa, Hiroshi Nakano, Yasutake Hirachi, Hiroshi Isono, Atsushi Ishii, Makoto Ando

IEICE TRANSACTIONS ON COMMUNICATIONS   E96B ( 12 )   3108 - 3115   2013.12

Electromagnetic simulation modeling of silicon substrate for 60 GHz on-chip differential-feed dipole antenna Reviewed

T. Hirano, K. Okada, J. Hirokawa, M. Ando

APPLIED PHYSICS LETTERS   103 ( 12 )   2013.9

Design and Measurement of the Plate Laminated Waveguide Slot Array Antenna and Its Feasibility for Wireless Link System in the 120 GHz Band Reviewed

Dongjin Kim, Jiro Hirokawa, Kimio Sakurai, Makoto Ando, Takuma Takada, Tadao Nagatsuma, Jun Takeuchi, Akihiko Hirata

IEICE TRANSACTIONS ON COMMUNICATIONS   E96B ( 8 )   2102 - 2111   2013.8

LTCC Oversized Rectangular Waveguide Slot Array Antenna With Air-Layer in the Radiating Part in the Millimeter-Wave Band Reviewed

Yuanfeng She, Ryusuke Fujino, Jiro Hirokawa, Makoto Ando, Daisuke Hanatani, Masahiro Fujimoto

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   61 ( 4 )   1777 - 1783   2013.4

A Hollow Rectangular Coaxial Line for Slot Array Applications Fabricated by Diffusion Bonding of Laminated Thin Metal Plates Reviewed

Makoto Sano, Jiro Hirokawa, Makoto Ando

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   61 ( 4 )   1810 - 1815   2013.4

Systematic Design Methodology for One-Dimensional Compound Slot-Arrays Combining Method of Moments, Equivalent Circuit Model and Forward Matching Procedure

Montesinos-Ortego, I., Zhang, M., Sierra-Perez, M., Hirokawa, J., Ando, M.

Ieee Transactions on Antennas and Propagation   61 ( 1 )   2013

An Equivalent Double Layer Model for a Fast Design and Analysis of High Gain-Multilayer Radial Line Slot Antennas

Tung Nguyen, Jayawardene, Rushanthi, Takano, Yasutomo, Sakurai, Kimio, Hirokawa, Jiro, Ando, Makoto, Amano, Osamu, Koreeda, Shuichi, Matsuzaki, Takaomi, Kamata, Yukio

Ieice Transactions on Communications   E96B ( 11 )   2891 - 2900   2013

Guest Editorial for the Special Issue on Antennas and Propagation at mm- and Sub mm-Waves

Liu, Duixian, Hirokawa, Jiro, Costa, Jorge, Fernandes, Carlos, Sauleau, Ronan

Ieee Transactions on Antennas and Propagation   61 ( 4 )   1502 - 1507   2013

A Radial Line Slot Antenna for an Elliptical Beam Reviewed

Tung Nguyen, Hideki Ueda, Jiro Hirokawa, Makoto Ando

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   60 ( 12 )   5531 - 5537   2012.12

LTCC Partially-Filled Post-Wall Rectangular-Waveguide Slot Array Antenna in the Millimeter-Wave Band Reviewed

Yuanfeng She, Jiro Hirokawa, Makoto Ando, Daisuke Hanatani, Masahiro Fujimoto

IEICE TRANSACTIONS ON ELECTRONICS   E95C ( 10 )   1635 - 1642   2012.10

A 45 degrees Linearly Polarized Hollow-Waveguide Corporate-Feed Slot Array Antenna in the 60-GHz Band Reviewed

Takashi Tomura, Yohei Miura, Miao Zhang, Jiro Hirokawa, Makoto Ando

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   60 ( 8 )   3640 - 3646   2012.8

Plate-laminated Waveguide Slot Array Antennas and its Polarization Conversion Layers Reviewed

Jiro Hirokawa

AUTOMATIKA   53 ( 1 )   9 - 19   2012.1

A Small Package with 46 dB Isolation between Tx and Rx Antennas Suitable for 60-GHz WPAN Module

Ryosuke Suga, Hiroshi Nakano, Yasutake Hirachi, Jiro Hirokawa, Makoto Ando

IEEE Transaction on Microwave Theory and Techniques,   60 ( 3 )   640 - 646   2012

A High-Efficiency Circularly-Polarized Aperture Array Antenna with a Corporate-Feed Circuit in the 60 GHz Band Reviewed

Yohei Miura, Jiro Hirokawa, Makoto Ando, Kazufumi Igarashi, Goro Yoshida

IEICE TRANSACTIONS ON ELECTRONICS   E94C ( 10 )   1618 - 1625   2011.10

Double-Layer Full-Corporate-Feed Hollow-Waveguide Slot Array Antenna in the 60-GHz Band Reviewed

Yohei Miura, Jiro Hirokawa, Makoto Ando, Yuzo Shibuya, Goro Yoshida

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   59 ( 8 )   2844 - 2851   2011.8

Eigenmode Analysis of Propagation Constant for a Microstrip Line with Dummy Fills on a Si CMOS Substrate Reviewed

Yuya Ono, Takuichi Hirano, Kenichi Okada, Jiro Hirokawa, Makoto Ando

IEICE TRANSACTIONS ON ELECTRONICS   E94C ( 6 )   1008 - 1015   2011.6

An E-Band Partially Corporate Feed Uniform Slot Array With Laminated Quasi Double-Layer Waveguide and Virtual PMC Terminations Reviewed

Miao Zhang, Jiro Hirokawa, Makoto Ando

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   59 ( 5 )   1521 - 1527   2011.5

Loss of Post-Wall Waveguides and Efficiency Estimation of Parallel-Plate Slot Arrays Fed by the Post-Wall Waveguide in the Millimeter-Wave Band Reviewed

Yuanfeng She, Thi Huong Tran, Koh Hashimoto, Jiro Hirokawa, Makoto Ando

IEICE TRANSACTIONS ON ELECTRONICS   E94C ( 3 )   312 - 320   2011.3

Full-Wave Design Considering Slot Admittance in 2-D Waveguide Slot Arrays with Perfect Input Matching Reviewed

Miao Zhang, Jiro Hirokawa, Makoto Ando

IEICE TRANSACTIONS ON COMMUNICATIONS   E94B ( 3 )   725 - 734   2011.3

A Center-Feed Linear Array of Reflection-Canceling Slot Pairs on Post-Wall Waveguide Reviewed

Jae-Ho Lee, Jiro Hirokawa, Makoto Ando

IEICE TRANSACTIONS ON COMMUNICATIONS   E94B ( 1 )   326 - 329   2011.1

Periodically Loaded Straight Wires for Radio Wave Transmission Control Reviewed

Kyoichi Iigusa, Hiroshi Harada, Shuzo Kato, Jiro Hirokawa, Makoto Ando

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   59 ( 1 )   328 - 332   2011.1

Practical Slot Array Design by Method of Moments Using One Basis Function and Constant Correction Length Reviewed

Jae-Ho Lee, Takuichi Hirano, Jiro Hirokawa, Makoto Ando

IEICE TRANSACTIONS ON COMMUNICATIONS   E94B ( 1 )   158 - 165   2011.1

Iteration-Free Design of Waveguide Slot Array With Cavities Reviewed

Takehito Suzuki, Jiro Hirokawa, Makoto Ando

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   58 ( 12 )   3891 - 3897   2010.12

A Post-Wall Waveguide Center-Feed Parallel Plate Slot Array Antenna in the Millimeter-Wave Band Reviewed

Koh Hashimoto, Jiro Hirokawa, Makoto Ando

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   58 ( 11 )   3532 - 3538   2010.11

De-Embedding Method Using an Electromagnetic Simulator for Characterization of Transistors in the Millimeter-Wave Band Reviewed

Takuichi Hirano, Hiroshi Nakano, Yasutake Hirachi, Jiro Hirokawa, Makoto Ando

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES   58 ( 10 )   2663 - 2672   2010.10

A Coaxial Feeder with Two Pairs of Parasitic Pins for Realizing Rotationally Symmetric Aperture Illumination in Spiral Array Radial Line Slot Antennas Reviewed

Hideki Ueda, Jiro Hirokawa, Makoto Ando, Matteo Albani

IEICE TRANSACTIONS ON COMMUNICATIONS   E93B ( 10 )   2554 - 2561   2010.10

Design of a Partially-Corporate Feed Double-Layer Slotted Waveguide Array Antenna in 39 GHz Band and Fabrication by Diffusion Bonding of Laminated Thin Metal Plates Reviewed

Miao Zhang, Jiro Hirokawa, Makoto Ando

IEICE TRANSACTIONS ON COMMUNICATIONS   E93B ( 10 )   2538 - 2544   2010.10

A Post-Wall Center-Feed Waveguide Circuit Consisting of T-Junctions for Reducing the Slot-Free Area in a Parallel Plate Slot Array Antenna Reviewed

Koh Hashimoto, Jiro Hirokawa, Makoto Ando

IEICE TRANSACTIONS ON ELECTRONICS   E93C ( 7 )   1047 - 1054   2010.7

Reduction of Long Line Effects in Single-Layer Slotted Waveguide Arrays With an Embedded Partially Corporate Feed Reviewed

Makoto Ando, Yasuhiro Tsunemitsu, Miao Zhang, Jiro Hirokawa, Shusuke Fujii

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   58 ( 7 )   2275 - 2280   2010.7

Cost-Effective 60-GHz Antenna-Package with End-Fire Radiation for Wireless File-Transfer System

Ryosuke Suga, Hiroshi Nakano, Yasutake Hirachi, Jiro Hirokawa, Makoto Ando

IEEE Transaction on Microwave Theory and Techniques,   58 ( 12 )   3989 - 3995   2010

Bandwidth Enhancement of Aperture Feed by an Air Rectangular Cavity Backing in a LTCC Post-Wall Waveguide Reviewed

JungAun Lee, Jiro Hirokawa, Makoto Ando

IEICE TRANSACTIONS ON ELECTRONICS   E92C ( 1 )   121 - 126   2009.1

Single-layer waveguide feed for uniform plane TEM-Wave in oversized-rectangular waveguide with hard-surface sidewalls Reviewed

Miroslav Samardzija, Takafumi Kai, Jiro Hirokawa, Makoto Ando

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   54 ( 10 )   2813 - 2819   2006.10

A slotted post-wall waveguide array with interdigital structure for 45 degrees linear and dual polarization Reviewed

S Park, Y Okajima, J Hirokawa, M Ando

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   53 ( 9 )   2865 - 2871   2005.9

Special section on 2004 international symposium on antennas and propagation Reviewed

Yoshio Karasawa, Toru Uno, Hiroyuki Arai, Hisato Iwai, Shin-Ichi Ichitsubo, Masahiko Nishimoto, Jiro Hirokawa, Kiyotaka Fujisaki, Hisashi Morishita, Masaharu Takahashi, Hiroshi Shirai, Futoshi Kuroki, Hiroaki Miyashita, Qiang Chen, Mitoshi Fujimoto, Nishimori Kentaro

IEICE Transactions on Communications   E88-B ( 6 )   2229 - 2229   2005

Analysis of a waveguide with a round-ended wide straight slot by the method of moments using numerical-eigenmode basis functions

M Zhang, T Hirano, J Hirokawa, M Ando

IEICE TRANSACTIONS ON COMMUNICATIONS   E87B ( 8 )   2319 - 2326   2004.8

A study of aspect ratio of the aperture and the effect on antenna efficiency in oversized rectangular slotted waveguide arrays

H Kai, J Hirokawa, M Ando

IEICE TRANSACTIONS ON COMMUNICATIONS   E87B ( 6 )   1623 - 1630   2004.6

Mechanical phase shifting in the power divider for single-layer slotted waveguide arrays

M Higaki, J Hirokawa, M Ando

IEICE TRANSACTIONS ON COMMUNICATIONS   E87B ( 2 )   310 - 316   2004.2

A transformer between a thin post-wall waveguide and a standard metal waveguide via a dielectric substrate insertion with slits etched on it

T Kai, J Hirokawa, M Ando

IEICE TRANSACTIONS ON COMMUNICATIONS   E87B ( 1 )   200 - 203   2004.1

A stepped post-wall waveguide with aperture interface to standard waveguide Reviewed

T Kai, J Hirokawa, M Ando

IEEE ANTENNAS AND PROPAGATION SOCIETY SYMPOSIUM, VOLS 1-4 2004, DIGEST   1527 - 1530   2004

Analysis of radial line slot antennas with dielectric layers over the aperture Reviewed

K Miyachi, J Hirokawa, M Ando

ELECTRONICS AND COMMUNICATIONS IN JAPAN PART I-COMMUNICATIONS   87 ( 3 )   19 - 27   2004

Full-model analysis of a radial line slot antenna including the feeder and improvement of aperture field uniformity by shift of position of each slot pair in the radial direction Reviewed

K Sudo, J Hirokawa, M Ando, M Sierra-Castaner

IEEE ANTENNAS AND PROPAGATION SOCIETY SYMPOSIUM, VOLS 1-4 2004, DIGEST   2349 - 2352   2004

Analysis of inner fields and aperture illumination of an oversize rectangular slotted waveguide

H Kai, J Hirokawa, M Ando

IEE PROCEEDINGS-MICROWAVES ANTENNAS AND PROPAGATION   150 ( 6 )   415 - 421   2003.12

A radial line slot antenna fed by a rectangular waveguide through a crossed slot

K Sudo, T Hirano, J Hirokawa, M Ando

IEICE TRANSACTIONS ON COMMUNICATIONS   E86B ( 10 )   3063 - 3070   2003.10

An Analysis and Design of a Notched Annular Ring Slot on a Shorting Plate of a Rectangular Waveguide by the Method of Moments Using Numerical Eigenmodes

Takuichi Hirano, JIRO HIROKAWA, Makoto Ando

The Transactions of the Institute of Electronics, Information and Communication Engineers B   J86-B ( 9 )   1870 - 1877   2003.9

Simple analysis of a slot and a reflection-canceling post in a rectangular waveguide using only the axial uniform currents on the post surface

SH Park, J Hirokawa, M Ando

IEICE TRANSACTIONS ON COMMUNICATIONS   E86B ( 8 )   2482 - 2487   2003.8

Waveguide matching crossed-slot

T Hirano, J Hirokawa, M Ando

IEE PROCEEDINGS-MICROWAVES ANTENNAS AND PROPAGATION   150 ( 3 )   143 - 146   2003.6

A beam switching slot array with a 4-way Butler matrix installed in single layer post-wall waveguides

S Yamamoto, J Hirokawa, M Ando

IEICE TRANSACTIONS ON COMMUNICATIONS   E86B ( 5 )   1653 - 1659   2003.5

Development of planar antennas

Y Suzuki, J Hirokawa

IEICE TRANSACTIONS ON COMMUNICATIONS   E86B ( 3 )   909 - 924   2003.3

Proposal for a slot pair array having an invariant main beam direction with a cosecant radiation pattern using a post-wall waveguide

T Ohno, K Ogawa, T Teraoka, J Hirokawa

IEICE TRANSACTIONS ON ELECTRONICS   E86C ( 2 )   176 - 183   2003.2

Analysis of Radial Line Slot Antennas with Dielectric Layers Over the Aperture

MIYACHI Kensuke, HIROKAWA Jiro, ANDO Makoto

The Transactions of the Institute of Electronics,Information and Communication Engineers B   86 ( 3 )   511 - 519   2003

Postwall waveguide slot array with cosecant radiation pattern and null filling for base station antennas in local multidistributed systems

J Hirokawa, C Yamazaki, M Ando

RADIO SCIENCE   38 ( 2 )   2002.12

A planar cross-junction power divider for the center feed in single-layer slotted waveguide arrays

SH Park, J Hirokawa, M Ando

IEICE TRANSACTIONS ON COMMUNICATIONS   E85B ( 11 )   2476 - 2481   2002.11

Alternating-phase fed single-layer slotted waveguide arrays with chokes dispensing with narrow wall contacts

Y Kimura, T Hirano, J Hirokawa, M Ando

IEE PROCEEDINGS-MICROWAVES ANTENNAS AND PROPAGATION   148 ( 5 )   295 - 301   2001.10

Special Issue on Innovation in Antennas and Propagation for Expanding Radio Systems

HIROKAWA Jiro, SHIRAI Hiroshi, ARAI Hiroyuki, HASE Yoshihiro, ITO Koichi, KARASAWA Yoshio, SATO Motoyuki, SATO Toru, NISHIKAWA Kunitoshi, UNO Toru, WATANABE Fumio, ANDO Makoto

IEICE transactions on communications   84 ( 9 )   2339 - 2340   2001.9

Low sidelobe single-layer slotted waveguide arrays at 76 GHz band

Y Kimura, K Fukazawa, J Hirokawa, M Ando, N Goto

IEICE TRANSACTIONS ON COMMUNICATIONS   E84B ( 9 )   2377 - 2386   2001.9

A two-beam waveguide slot array with sidelobe suppression

Y Kimura, H Shinoda, K Watanabe, J Hirokawa, M Ando

IEICE TRANSACTIONS ON COMMUNICATIONS   E84B ( 4 )   1070 - 1078   2001.4

45 degrees linearly polarised post-wall waveguide-fed parallel-plate slot arrays

J Hirokawa, M Ando

IEE PROCEEDINGS-MICROWAVES ANTENNAS AND PROPAGATION   147 ( 6 )   515 - 519   2000.12

Efficiency of 76-GHz post-wall waveguide-fed parallel-plate slot arrays

J Hirokawa, M Ando

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   48 ( 11 )   1742 - 1745   2000.11

Sidelobe suppression in 76-GHz post-wall waveguide-fed parallel-plate slot arrays

J Hirokawa, M Ando

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   48 ( 11 )   1727 - 1732   2000.11

Method of moments analysis of a waveguide crossed slot by using the eigenmode basis functions derived by the edge-based finite-element method

T Hirano, J Hirokawa, M Ando

IEE PROCEEDINGS-MICROWAVES ANTENNAS AND PROPAGATION   147 ( 5 )   349 - 353   2000.10

High gain radial line slot antennas for millimetre wave applications

A Akiyama, T Yamamoto, J Hirokawa, M Ando, E Takeda, Y Arai

IEE PROCEEDINGS-MICROWAVES ANTENNAS AND PROPAGATION   147 ( 2 )   134 - 138   2000.4

60 GHz band small aperture conical beam radial line slot antennas

A Akiyama, J Hirokawa, M Ando, E Takeda, Y Arai

IEICE TRANSACTIONS ON ELECTRONICS   E82C ( 7 )   1229 - 1235   1999.7

A full-wave analysis of a complete model for a radial line slot antenna

T Yamamoto, J Hirokawa, M Ando

IEICE TRANSACTIONS ON COMMUNICATIONS   E82B ( 1 )   165 - 173   1999.1

A two-beam slotted leaky waveguide array for mobile reception of dual-polarization DBS

K Sakakibara, Y Kimura, J Hirokawa, M Ando, N Goto

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY   48 ( 1 )   1 - 7   1999.1

Single-layer slotted waveguide arrays for dbs reception and higher frequency applications

M Ando, J Hirokawa

ELECTROMAGNETICS   19 ( 1 )   23 - 48   1999.1

Accelerant method for Green's function of horizontal dipole in parallel plate waveguide

R Jin, J Hirokawa, M Ando

IEE PROCEEDINGS-MICROWAVES ANTENNAS AND PROPAGATION   145 ( 5 )   430 - 432   1998.10

Novel single-layer waveguides for high-efficiency millimeter-wave arrays

M Ando, J Hirokawa, T Yamamoto, A Akiyama, Y Kimura, N Goto

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES   46 ( 6 )   792 - 799   1998.6

Two-way power divider for partially parallel feed in single-layer slotted waveguide arrays

K Fukazawa, J Hirokawa, M Ando, N Goto

IEICE TRANSACTIONS ON COMMUNICATIONS   E81B ( 6 )   1248 - 1254   1998.6

Single-layer feed waveguide consisting of posts for plane TEM wave excitation in parallel plates

J Hirokawa, M Ando

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   46 ( 5 )   625 - 630   1998.5

Phase control of circular polarization from a slot with a parasitic dipole

KS Min, J Hirokawa, K Sakurai, M Ando

IEICE TRANSACTIONS ON COMMUNICATIONS   E81B ( 3 )   668 - 673   1998.3

Alternating phase-fed waveguide slot arrays with a single-layer multiple-way power divider

K Sakakibara, Y Kimura, A Akiyama, J Hirokawa, M Ando, N Goto

IEE PROCEEDINGS-MICROWAVES ANTENNAS AND PROPAGATION   144 ( 6 )   425 - 430   1997.12

A single-layer linear-to-circular polarization converter for a narrow-wall slotted waveguide array

KS Min, J Hirokawa, K Sakurai, M Ando, N Goto, Y Hara

IEICE TRANSACTIONS ON COMMUNICATIONS   E80B ( 8 )   1264 - 1272   1997.8

Analysis of an untilted wire-excited slot in the narrow wall of a rectangular waveguide by including the actual external structure

J Hirokawa, L Manholm, PS Kildal

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   45 ( 6 )   1038 - 1044   1997.6

Excitation of an untilted narrow-wall slot in a rectangular waveguide by using etched strips on a dielectric plate

J Hirokawa, PS Kildal

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   45 ( 6 )   1032 - 1037   1997.6

Development of a power divider in the H plane using posts in a rectangular waveguide for the next generation lower hybrid current drive antenna

M Seki, S Maebara, H Fukuda, Y Ikeda, T Imai, J Hirokawa, H Arai

FUSION ENGINEERING AND DESIGN   36 ( 2-3 )   281 - 287   1997.5

Corrugated soft sector horn with different beam properties in the two principal planes

DJ Salomonsson, J Hirokawa, PS Kildal, A Tengs

IEE PROCEEDINGS-MICROWAVES ANTENNAS AND PROPAGATION   144 ( 1 )   13 - 19   1997.2

Single-layer slotted waveguide arrays for millimeter wave applications

K Sakakibara, J Hirokawa, M Ando, N Goto

IEICE TRANSACTIONS ON COMMUNICATIONS   E79B ( 12 )   1765 - 1772   1996.12

Periodic boundary condition for evaluation of external mutual couplings in a slotted waveguide array

K Sazakibara, J Hirokawa, M Ando, N Goto

IEICE TRANSACTIONS ON COMMUNICATIONS   E79B ( 8 )   1156 - 1164   1996.8

Single-layer dipole array for linear-to-circular polarisation conversion of slotted waveguide array

KS Min, J Hirokawa, K Sakurai, M Ando, N Goto

IEE PROCEEDINGS-MICROWAVES ANTENNAS AND PROPAGATION   143 ( 3 )   211 - 216   1996.6

High-gain and high-efficiency single-layer slotted waveguide array for use in 22GHz band

K Sakakibara, J Hirokawa, M Ando, N Goto

ELECTRONICS LETTERS   32 ( 4 )   283 - 284   1996.2

A SINGLE-LAYER SLOTTED LEAKY WAVE-GUIDE ARRAY ANTENNA FOR MOBILE RECEPTION OF DIRECT BROADCAST FROM SATELLITE

J HIROKAWA, M ANDO, N GOTO, N TAKAHASHI, T OJIMA, M UEMATSU

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY   44 ( 4 )   749 - 755   1995.11

A ROTATING MODE RADIAL LINE SLOT ANTENNA FED BY A CAVITY RESONATOR

S HOSONO, J HIROKAWA, M ANDO, N GOTO, H ARAI

IEICE TRANSACTIONS ON COMMUNICATIONS   E78B ( 3 )   407 - 413   1995.3

CALCULATION OF EXTERNAL APERTURE ADMITTANCE AND RADIATION-PATTERN OF A NARROW SLOT CUT ACROSS AN EDGE OF A SECTORAL CYLINDER IN TERMS OF A SPECTRUM OF 2-DIMENSIONAL SOLUTIONS

J HIROKAWA, J WETTERGREN, PS KILDAL, M ANDO, N GOTO

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   42 ( 9 )   1243 - 1249   1994.9

A LINEARLY-POLARIZED SLOTTED WAVE-GUIDE ARRAY USING REFLECTION-CANCELING SLOT PAIRS

K SAKAKIBARA, J HIROKAWA, M ANDO, N GOTO

IEICE TRANSACTIONS ON COMMUNICATIONS   E77B ( 4 )   511 - 518   1994.4

A SINGLE-LAYER MULTIPLE-WAY POWER DIVIDER FOR A PLANAR SLOTTED WAVE-GUIDE ARRAY

J HIROKAWA, M ANDO, N GOTO

IEICE TRANSACTIONS ON COMMUNICATIONS   E75B ( 8 )   781 - 787   1992.8

WAVE-GUIDE PI-JUNCTION WITH AN INDUCTIVE POST

J HIROKAWA, M ANDO, N GOTO

IEICE TRANSACTIONS ON ELECTRONICS   E75C ( 3 )   348 - 351   1992.3

WAVE-GUIDE-FED PARALLEL PLATE SLOT ARRAY ANTENNA

J HIROKAWA, M ANDO, N GOTO

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION   40 ( 2 )   218 - 223   1992.2

MATCHING SLOT PAIR FOR A CIRCULARLY-POLARIZED SLOTTED WAVE-GUIDE ARRAY

J HIROKAWA, K SAKURAI, M ANDO, N GOTO

IEE PROCEEDINGS-H MICROWAVES ANTENNAS AND PROPAGATION   137 ( 6 )   367 - 371   1990.12

ANALYSIS OF SLOT COUPLING IN A RADIAL LINE SLOT ANTENNA FOR DBS RECEPTION

J HIROKAWA, M ANDO, N GOTO

IEE PROCEEDINGS-H MICROWAVES ANTENNAS AND PROPAGATION   137 ( 5 )   249 - 254   1990.10

CAVITY-BACKED WIDE SLOT ANTENNA

J HIROKAWA, H ARAI, N GOTO

IEE PROCEEDINGS-H MICROWAVES ANTENNAS AND PROPAGATION   136 ( 1 )   29 - 33   1989.2

積層薄板拡散接合中空導波管並列給電スロットアレーアンテナ，次世代無線通信に向けたアンテナ開発

（ Role： Joint author）

CMC出版  2020.10 

新しいアンテナをつくるときに考えること，ITUジャーナル

（ Role： Sole author）

日本ITU協会  2020.10 

電磁波解析

広川, 二郎, 安藤, 真（ Role： Joint author）

デザインエッグ  2020.9  （ ISBN:9784815022303 ）

Electromagnetic Wave Analysis

Jiro Hirokawa, Makoto Ando（ Role： Joint author）

Design Egg Inc.  2020.9 

Waveguide Slot Antenna Analysis using Eigenfunction Expansion Method

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Design Egg Inc.  2020.8 

固有関数展開法を用いた導波管スロットアンテナ解析

（ Role： Sole author）

デザインエッグ社  2020.8 

アンテナ及び関連技術の最新動向 新しいアンテナをつくるときに考えること

広川二郎

2020 

Plate-laminated Waveguide Slot Array Antennas, IEICE Commun. Global News Lett.

（ Role： Sole author）

IEICE  2019.9 

ミリ波アンテナの実際，信学会誌

（ Role： Sole author電子情報通信学会）

2019.9 

ミリ波アンテナの実際

広川二郎

2019 

Antenna Engineering Handbook

Jiro Hirokawa, Takashi Tomura（ Role： Joint author）

McGraw-Hill Education  2018.12 

電磁波工学

広川, 二郎, 木村, 雄一, 新井, 宏之（ Role： Joint author）

朝倉書店  2018.11  （ ISBN:9784254222142 ）

Waveguide slot array antennas Reviewed

Jiro Hirokawa, Miao Zhang

Springer Singapore  2016.9 

60GHz帯シリコンチップ厚膜誘電体上高効率パッチアンテナ，最新ミリ波技術

（ Role： Joint author）

シーエムシー出版  2015.7 

38GHz帯中距離伝送システム用平面アンテナ，最新ミリ波技術

広川二郎, 張淼（ Role： Joint author）

シーエムシー出版  2015.7 

Waveguide Slot Array Antennas, Handbook of Antenna Tech.

Jiro Hirokawa, Miao Zhang（ Role： Joint author）

2015.2 

「はやぶさ2」搭載ハニカム構造軽量高利得平面アンテナ，ISASニュース

（ Role： Sole author）

宇宙科学研究所  2014.11 

スタンダード工学系の微分方程式

広川, 二郎, 安岡, 康一（ Role： Joint author）

講談社  2014.3  （ ISBN:9784061565333 ）

スタンダード工学系の複素解析

安岡, 康一, 広川, 二郎（ Role： Joint author）

講談社  2014.3  （ ISBN:9784061565340 ）

60 GHz 帯におけるマイクロストリップ線路と LCP 基板を用いたフレキシブルなポスト壁導波路間のモード変換，フジクラ技報

広川二郎, 安藤真, 上道雄介, 細野亮平, 官寧, 岡本誠裕, 板橋敦（ Role： Joint author）

フジクラ  2014.2 

Accuracy Investigation of De-embedding Techniques Based on Electromagnetic Simulation for On-wafer RF Measurements, Numerical Simulation - From Theory to Industry

Takuichi Hirano, Kenichi Okada, Jiro Hirokawa, Makoto Ando（ Role： Joint author）

InTech Open Access Book  2012.9 

Planar Waveguide-Type Slot Arrays Reviewed

Jiro Hirokawa, Makoto Ando

John Wiley & Sons, Ltd  2009.2 

Planar Waveguide-type Slot Arrays, Advanced Millimeter-wave Technologies

Jiro Hirokawa, Makoto Ando（ Role： Joint author）

Wiley  2009.2 

Planar waveguide antennas for Millimeter-wave systems Reviewed

Makoto Ando, Jiro Hirokawa

2009 

Development of Radio Equipment for a Polarization Division Duplex System, JRC Review

Goro Yoshida, Masatoshi Nagayasu, Kazuya Kojima, Yasuhiro Tsunemitsu, Makoto Ando, Jiro Hirokawa（ Role： Joint authorJRC）

2007 

アレーアンテナの基礎，アンテナ・無線ハンドブック

広川二郎, 大橋英征（ Role： Joint author）

オーム社  2006.10 

中央給電一層構造逆相給電導波管スロットアレーの反射特性の一解析法，日本無線技報

常光康弘, 三浦庸平, 風間保裕, 朴世鉉, 広川二郎, 安藤真, 後藤尚久（ Role： Joint author）

日本無線  2006.3 

モーメント法，計算電磁気学

田口光雄, 広川二郎（ Role： Joint author）

培風館  2003.7 

ミリ波ポスト壁導波路給電スロットアレーアンテナの効率への誘電体基板材料の影響、マテリアルインテグレーション

（ Role： Sole author）

TIC  2002.12 

ミリ波ポスト壁導波路給電スロットアレーアンテナの効率への誘電体基板材料の影響 (特集 高周波材料・高周波デバイス)

広川 二郎

ティ-・アイ・シ-  2002.12 

ミリ波帯導波管型平面アンテナの優位性と展開、東工大クロニクル

（ Role： Sole author）

東工大広報社会連携センター  2002.10 

ダイアディックグリーン関数の固有関数展開を用いたアンテナ解析コース―モーメント法による導波管スロットアンテナの解析―、アンテナ・伝播における設計・解析手法ワークショップ(第20回)

（ Role： Sole author）

電子情報通信学会  2001.4 

マイクロ波，改訂電子情報通信用語辞典

（ Role： Joint author）

コロナ社  1999.7 

導波管平面アンテナ，ミリ波技術の基礎と応用

安藤真, 広川二郎（ Role： Joint author）

リアライズ社  1998.7 

MoM Analysis of Slot Coupling in a Rectangular Waveguide using Seki’s Virtual Cavity Method

Jiro Hirokawa（ Role： Sole author）

IEEE AP-S Intl. Symp. Workshop  1996.7 

偏波共用モノパルス並列給電導波管スロットアレーを用いた直角座標系直交非遠方界8多重QPSK伝送

加藤優也, 広川二郎, 戸村崇, 竹厚善生, 赤堀耕一郎, 谷口徹

信学技報   2025.3

より小さい結合比の結合器を用いた4ビーム切替マトリックスの構成と設計 International coauthorship

張博与, ゴ セイカ, 広川二郎, 戸村崇, Nelson J. G. Fonseca

信学技報   2025.1

Numerical design of one-dimensional switching matrices with an arbitrary number of beams and application to millimeter-wave two-dimensional one Invited

Jiro Hirokawa

IEEE Applied Sensing Conf.   2025.1

一層並列給電導波管64x64スロットアレーアンテナの設計

齋藤敦市, 広川二郎, 戸村崇

信学技報   2025.1

任意ビーム数1次元切替マトリックスの数値設計と2次元切替マトリックス用要素の動作 Invited

広川二郎

信学技報   2024.11

ループアンテナを用いた海中移動体向けWavelet-OFDM無線通信システムの検討

枷場亮祐, 江口和弘, 脇坂俊幸, 広川二郎, 廣瀬幸, 松嶋徹, 福本幸弘, 西田祐也, 石井和男

信学技報   2024.11

円形導波管ベンドTM01モード変換器で給電した150GHz帯垂直偏波無指向性反射鏡アンテナ

広川二郎, 柳澤利樹, 戸村崇, 渡邊一世

信学技報   2024.11

Design of the 2x2-Slot Element for a 150 GHz band Corporate-Feed Waveguide Slot Array Antenna Reviewed

Atsushi Saito, Jiro Hirokawa, Takashi Tomura

Intl. Symp. Antennas Propag.   2024.11

Rectangular-Coordinate Orthogonal Non-Far Region Four-Multiplexing QPSK Transmission Using Monopulse Corporate-Feed Waveguide Slot Arrays Reviewed

Yuya Kato, Jiro Hirokawa, Takashi Tomura, Yoshio Takekoh, Koichiro Akahori, Toru Taniguchi

Intl. Symp. Antennas Propag.   2024.11

Design of Beam-Steering Matching Elements for Waveguide Radiation Aperture Array Antennas Reviewed

Riku Maeda, Takashi Tomura, Jiro Hirokawa, Daisuke Yamanaka, Nobutaka Kidera, Osamu Kagaya

Intl. Symp. Antennas Propag.   2024.11

120GHz帯8x1素子導波管開口アレーアンテナのビーム走査整合素子の検討

前田陸, 戸村崇, 広川二郎, 山中大輔, 木寺信隆, 加賀谷修

信学技報   2024.10

Optimal Output Phase Difference Assignment in One-Dimensional Parallel Switching Matrix with Five Beams International coauthorship

Shengjia Wu, Jiro Hirokawa, Takashi Tomura, Nelson J. G. Fonseca

2024.9

Design of a Partial Corporate-Feed Dual-Polarized Parallel-Plate Waveguide Slot Array Antenna

Huanqian Xiong, Jiro Hirokawa, Takashi Tomura

2024.9

Recent Advances on Parallel Plate Slot Array Antennas for Synthetic Aperture Radar Invited

Jiro Hirokawa

Malaysia-Japan Workshop Radio Tech   2024.8

Reflection-Canceling Waveguide Narrow-Wall Slot Element Suitable for Diffusion Bonding Of Laminated Metal Plates Reviewed

Jiro Hirokawa, Rikako Yamaguchi, Takashi Tomura, Minoru Inomata, Wataru Yamada

2024 IEEE INC-USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)   298 - 298   2024.7

SIW-Based Elliptical Slots Antenna with Wide ARBW for Millimeter-Wave Applications Reviewed International coauthorship

Maharana Pratap Singh, Anil Kumar Nayak, Takashi Tomura, Jiro Hirokawa, Saptarshi Ghosh

2024 IEEE International Symposium on Antennas and Propagation and INC/USNC‐URSI Radio Science Meeting (AP-S/INC-USNC-URSI)   129 - 130   2024.7

Optimal Output Phase Difference Assignment in One-Dimensional Parallel Switching Matrix with Five Beams Reviewed International coauthorship

Shengjia Wu, Jiro Hirokawa, Takashi Tomura, Nelson J. G. Fonseca

2024 IEEE INC-USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)   303 - 303   2024.7

Millimeter Wave Antennas and Arrays Invited

Jiro Hirokawa

IEEE AP-S URSI Intl. Symp   2024.7

ミリ波自動車レーダ用導波管3×2スロットサブアレーアンテナ

櫻井亮輔, 広川二郎, 戸村崇

信学技報   2024.7

ミリ波レーダ用ポスト壁導波路直列給電スロットサブアレー

佐藤隼翔, 広川二郎, 戸村崇

信学技報   2024.7

Recent Progress in Two-dimensional Orthogonal Switching Matrices with an Arbitrary Number of Beams Invited Reviewed International coauthorship

Jiro Hirokawa, Qi Li, Takashi Tomura, Nelson J. G. Fonseca

IEEE AP-S URSI Intl. Symp.   2024.7

Low Cost, Compact SAR System for Small-Satellite Constellation at LEO and vLEO

Hirobumi Saito, Jiro Hirokawa

IMS Workshop   2024.6

Development of Low-Loss and Low-Cost Air-Filled Transmission Lines based on Advanced Glass Wafer Packaging Reviewed International coauthorship

Cai Jing, Miao Zhang, Daquan Yu, Jiro Hirokawa

2024 IEEE International Workshop on Antenna Technology (iWAT)   177 - 178   2024.4

A Study of Handover Methods Considering Multipath Interference in a Mixed Network of Heterogeneous Base Stations

平田翔, 宇治川智, 松田崇弘, 広川二郎, 今井哲朗, 平栗健史

電子情報通信学会技術研究報告(Web)   123 ( 368(CQ2023 52-69) )   2024

Directional beam antenna control in response to drone tilts

Chikayo Hata, Takehumi Hiraguri, Takahiro Matsuda, Tetsuro Imai, Jiro Hirokawa

2023 International Conference on Consumer Electronics - Taiwan (ICCE-Taiwan)   2023.7

Study on drone handover methods suitable for multipath interference due to obstacles

平田翔, 宇治川智, 松田崇弘, 広川二郎, 今井哲朗, 平栗健史

電子情報通信学会技術研究報告(Web)   123 ( 137(CS2023 18-58) )   2023

A study of directional beam antenna with no-fed elements for drone relay networks

畑知華代, 田島裕也, 平栗健史, 松田崇弘, 今井哲朗, 広川二郎

映像情報メディア学会冬季大会講演予稿集(CD-ROM)   2022   2022

小型合成開口レーダ衛星用のCFRP製2次元スロットアレーアンテナの試作

齋藤宏文, 齋藤宏文, 石村康生, 戸村崇, 広川二郎

電子情報通信学会技術研究報告(Web)   122 ( 316(AP2022 173-176) )   2022

Deployable Slot Array CFRP Antenna for Small SAR Satellite

齋藤宏文, 齋藤宏文, 戸村崇, 広川二郎

電子情報通信学会大会講演論文集(CD-ROM)   2022   2022

Demonstration of a 60GHz RLSA Launching Simultaneously Three OAM Modes International coauthorship

Xin Xu, Agnese Mazzinghi, Angelo Freni, Jiro Hirokawa

2021 International Conference on Electromagnetics in Advanced Applications, ICEAA 2021   222   2021.8

Near-field Aperture Distribution Measurement of 8x2-element 60-GHz-Band Circularly Polarized Post-Wall Waveguide Dipole Loaded Slot Arrays

Takashi Tomura, Jiro Hirokawa

2020 INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION (ISAP)   249 - 250   2021

A W-Band Corporate-Fed Hollow-Waveguide Slot Array Antenna by Glass Micromachining International coauthorship

Yaxiang Wu, Tian Yu, Miao Zhang, Daquan Yu, Jiro Hirokawa, Qing Huo Liu

2020 INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION (ISAP)   435 - 436   2021

Connecting Networks for Two-Dimensional Butler Matrices With Improved Aggregate Gain International coauthorship

Nelson J. G. Fonseca, Sophie-Abigael Gomanne, Jiro Hirokawa

2020 INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION (ISAP)   285 - 286   2021

Design of 60-GHz-band Post-wall Waveguide Two-Plane Couplers

戸村崇, 広川二郎, 山中大輔, 木寺信隆, 加賀谷修

電子情報通信学会大会講演論文集(CD-ROM)   2021   2021

Design of a Slot Array Antenna in Alternating-phase Feed Parallel-plate Waveguide

石川裕太, 戸村崇, 広川二郎

電子情報通信学会大会講演論文集(CD-ROM)   2021   2021

Design of a Square Arrangement of Circularly-polarized Crossed-slot Antennas on Alternating-phase Feed Parallel-plate Waveguide

石川裕太, 戸村崇, 広川二郎

電子情報通信学会大会講演論文集(CD-ROM)   2021   2021

The Writing Sample for the Conference

齋藤宏文, 広川二郎, 戸村崇, 石村康生, 田中孝治

電子情報通信学会大会講演論文集(CD-ROM)   2021   2021

Reception level in a touchless entrance control gate including the element pattern in the millimeter-wave band waveguide slot array installed on the sides

黒瀬瑞輝, 戸村崇, 広川二郎

電子情報通信学会大会講演論文集(CD-ROM)   2021   2021

Development of deployable CFRP slot array antenna for small SAR satellite

齋藤宏文, 石村康生, 戸村崇, 広川二郎, 田中孝治

電子情報通信学会技術研究報告(Web)   121 ( 5(AP2021 1-8) )   2021

Effect on Unloaded Q Factor by a Feeding Structure of a 330-350-GHz Band Reflection Type Hollow Rectangular Cavity

原慶城, 戸村崇, 広川二郎

電子情報通信学会大会講演論文集(CD-ROM)   2021   2021

Mode-matching Analysis and Genetic Algorithm Optimization for a Two-plane Coupler by Changing the Cross-sectional Shape of the Coupling Region

山川奨太, 戸村崇, 広川二郎

電子情報通信学会大会講演論文集(CD-ROM)   2021   2021

100kg級小型衛星搭載の合成開口レーダとその軌道上実証

齋藤宏文, 田中孝治, 三田信, アクバル プリランド リツキ, ブッダ パイン, 田中雅人, 渡辺宏弥, 小野寺尚人, 有坂市太郎, 小畑俊裕, 石村康生, 広川次郎

電子情報通信学会技術研究報告(Web)   121 ( 16(SANE2021 1-8) )   2021

Design of a Circularly Polarized Slot Array Antenna on an Parallel-plate Waveguide in 26GHz band

友利優希, WANG Tianyu, 広川二郎, 戸村崇

電子情報通信学会大会講演論文集(CD-ROM)   2021   2021

Excitation Phase Control of a Corporate-feed Waveguide Slot Array Antenna with a Single-Layer Printed Circuit Board Transmit-Array

櫻井壮一, 戸村崇, 広川二郎, GUPTA Shulabh

電子情報通信学会大会講演論文集(CD-ROM)   2021   2021

Analysis of the reception level in a touchless entrance control gate using the millimeter-wave band waveguide slot array installed on the sides

黒瀬瑞輝, 戸村崇, 広川二郎

電子情報通信学会大会講演論文集(CD-ROM)   2021   2021

Design of a Circularly Polarized Slot Array on a Parallel-plate Waveguide using Non-inclined Slots

友利優希, WANG Tianyu, 戸村崇, 広川二郎

電子情報通信学会技術研究報告(Web)   121 ( 191(AP2021 68-98) )   2021

Study of Square Region Irradiation Waveguide Slot Array Antenna

桂悠斗, 戸村崇, 広川二郎

電子情報通信学会技術研究報告(Web)   121 ( 191(AP2021 68-98) )   2021

60-GHz-band Spatial Duplex Radio over Fiber by Rectangular-Coordinate Two-Dimensional Orthogonal Multiplexing

戸村崇, 広川二郎, ALI Muhsin, CARPINTERO Guillermo

電子情報通信学会技術研究報告(Web)   121 ( 273(MWP2021 30-36) )   2021

Study of Mode Converters for Feeding an Omnidirectional Antenna in 300GHz-Band

柳澤利樹, 戸村崇, 広川二郎

電子情報通信学会技術研究報告(Web)   121 ( 191(AP2021 68-98) )   2021

Numerical design of one-dimensional switching matrices with an arbitrary number of beams and application to a triangular-lattice two-dimensional arrangement of beams

広川二郎, FONSECA Nelson J. G.

電子情報通信学会大会講演論文集(CD-ROM)   2021   2021

Rectangular-coordinate Orthogonal Non-far Region Two-multiplexing QPSK Transmission using Monopluse Corporate-feed Waveguide Slot Arrays

広川二郎, 戸村崇, 地頭所浩平, 西森健太郎, 竹厚善生, 赤堀耕一郎, 谷口徹

電子情報通信学会大会講演論文集(CD-ROM)   2021   2021

An Effect of the Surface Traveling Wave on Near Field to Far Field Transformation for Radar Cross Section Measurement

赤嶺賢彦, 戸村崇, 広川二郎

電子情報通信学会大会講演論文集(CD-ROM)   2021   2021

Prediction of Transmission Loss Considering Uncertainties of Dielectric Properties in Millimeter Waveband

Yuanfeng She, Yuto Kato, Jiro Hirokawa

2020 IEEE ASIA-PACIFIC MICROWAVE CONFERENCE (APMC)   926 - 928   2020

All-Dielectric Huygens' Metasurface Pair for mm-Wave Circularly-Polarized Beam-Forming International coauthorship

Mohamed K. Emara, Takashi Tomura, Jiro Hirokawa, Shulabh Gupta

2020 14TH EUROPEAN CONFERENCE ON ANTENNAS AND PROPAGATION (EUCAP 2020)   2020

Recent Progress of Corporate-Feed Slot Array Antennas for Non-far Region Communication

Jiro Hirokawa

2020 IEEE ASIA-PACIFIC MICROWAVE CONFERENCE (APMC)   78 - 80   2020

A 16x16-Element Single-Layer Full-Corporate-Fed SIW Slot Array Antenna International coauthorship

Miao Zhang, Baoquan Duan, Jiro Hirokawa, Qing Huo Liu, Guan-Long Huang

2020 14TH EUROPEAN CONFERENCE ON ANTENNAS AND PROPAGATION (EUCAP 2020)   2020

Two-dimensional Polarity Orthogonal Multiplexing Antenna System for Non-far Region Communication

Jiro Hirokawa, Takashi Tomura

2020 INTERNATIONAL WORKSHOP ON ANTENNA TECHNOLOGY (IWAT)   2020

UTD Ray Analysis of Compact Range Gigabit Wireless Access System International coauthorship

Panuwat Janpugdee, Takashi Tomura, Jiro Hirokawa

PROCEEDINGS OF THE 2020 IEEE INTERNATIONAL CONFERENCE ON COMPUTATIONAL ELECTROMAGNETICS (ICCEM 2020)   50 - 51   2020

Radial Line Slot Array Antenna for 5.8-GHz-Band Beam-Type Wireless Power Transmission

Takashi Tomura, Jiro Hirokawa, Minoru Furukawa, Teruo Fujiwara

2020 14TH EUROPEAN CONFERENCE ON ANTENNAS AND PROPAGATION (EUCAP 2020)   2020

Analysis and design of corporate-feed waveguide slot array antennas by hybrid method of moments and finite element methods

Takashi Tomura, Jiro Hirokawa

2020 IEEE MTT-S INTERNATIONAL CONFERENCE ON NUMERICAL ELECTROMAGNETIC AND MULTIPHYSICS MODELING AND OPTIMIZATION (NEMO 2020)   2020

Flight Model 7-Panel Slot-Array Deployable Antenna Measurement Results of MicroX-SAR 100kg Class Demonstration Satellite

Budhaditya Pyne, Hirobumi Saito, Prilando Rizki Akbar, Koji Tanaka, Jiro Hirokawa, Takashi Tomura

2020 50TH EUROPEAN MICROWAVE CONFERENCE (EUMC)   816 - 819   2020

32-Gbit/s Wireless Communication Using Planar Array Antennas in 300-GHz-band

綾野史也, 十市敬太, GOMEZ-TORRENT Adrian, OBERHAMMER Joachim, 戸村崇, 広川二郎, 永妻忠夫

電子情報通信学会大会講演論文集(CD-ROM)   2020   2020

Coupling suppression between microstrip antenna arrays with antenna decoupling surface

櫻井壮一, 戸村崇, 広川二郎

電子情報通信学会大会講演論文集(CD-ROM)   2020   2020

Design of a Four-layer Circularly Polarized Element for a Corporate-feed Array Using Hexagonal and a Circular Slot Layers

西本広希, 戸村崇, 広川二郎

電子情報通信学会大会講演論文集(CD-ROM)   2020   2020

Engineering Model Development of C&DH and COMM system for variable shape attitude control demonstration satellite HIBARI

根路銘省伍, 宮本清菜, 中条俊大, 佐藤宗一, 戸村崇, 廣川二郎, 坂本祐二, 松永三郎

宇宙科学技術連合講演会講演集(CD-ROM)   64th   2020

Design and miniaturization of Ψ-Shaped Patch Antenna on spherical surface

櫻井壮一, 地頭所浩平, 倉本航, CHEN Shihao, 戸村崇, 広川二郎

電子情報通信学会技術研究報告   119 ( 379(AP2019 148-180)(Web) )   2020

Investigation for Reflection-type 120-GHz-Band Split Ring Resonator Filter

厚地穂乃佳, 加藤圭悟, 枚田明彦, 戸村崇, 広川二郎, 渡邊一世, 関根徳彦, 笠松章史

電子情報通信学会大会講演論文集(CD-ROM)   2020   2020

Shape Optimization of an H-plane T-junction in a Corporate-feed Circuit for a Waveguide Slot Array

倉本航, 戸村崇, 広川二郎

電子情報通信学会大会講演論文集(CD-ROM)   2020   2020

Sequential Phase Feed by a Cross Slot to Four Spiral Slots on the Broad Wall of a Rectangular Waveguide

西本広希, 戸村崇, 広川二郎

電子情報通信学会大会講演論文集(CD-ROM)   2020   2020

Bandwidth Maximization by optimizing the Cross-sectional-Shape of the Coupling Region in Waveguide 2-plane Hybrid

CHEN Shihao, 戸村崇, 広川二郎

電子情報通信学会大会講演論文集(CD-ROM)   2020   2020

Improvement of Isolation between Transmitting and Receiving Antennas-of H-plane arranged Wideband Microstrip Arrays by using Slit Layers

地頭所浩平, 戸村崇, 広川二郎

電子情報通信学会大会講演論文集(CD-ROM)   2020   2020

Effectiveness of LoS-MIMO configuration independent transmit distance at 66 GHz band

西森健太郎, 松村尚輝, 谷口諒太郎, 平栗健史, 戸村崇, 広川二郎

電子情報通信学会大会講演論文集(CD-ROM)   2020   2020

Design of a Structure to Support Waveguide Sidewalls using an E-bend and a Step

山川奨太, 戸村崇, 広川二郎

電子情報通信学会大会講演論文集(CD-ROM)   2020   2020

Design for a Corporate-feed Microstrip Antenna array using Post-wall Rectangular Coaxial Waveguide in 79GHz band

櫻井壮一, 戸村崇, 広川二郎, 城崎俊文, 脇山悟, 新帯亮

電子情報通信学会大会講演論文集(CD-ROM)   2020   2020

Floquet Modal Analysis for a Transformer from Rectangular Waveguide to Groove Gap Waveguide

江尻敬祐, 戸村崇, 広川二郎

電子情報通信学会大会講演論文集(CD-ROM)   2020   2020

Experimental evaluation in outdoor environment at 66 GHz band by LoS-MIMO configuration independent transmit distance

西森健太郎, 松村尚輝, 谷口諒太郎, 平栗健史, 戸村崇, 広川二郎

電子情報通信学会技術研究報告   119 ( 486(AP2019 197-210)(Web) )   2020

Wideband Design of a H-plane T-junction by Shape Optimization for Corporate-feed Circuit in a 60GHz-band Waveguide Slot Array

倉本航, 戸村崇, 広川二郎

電子情報通信学会大会講演論文集(CD-ROM)   2020   2020

小型SAR衛星用の形状安定性に優れた軽量CFRP製展開パネルスロットアレイアンテナの開発(その1)

齋藤宏文, 石村康生, 戸村崇, 広川二郎, 田中孝治

宇宙科学技術連合講演会講演集(CD-ROM)   64th   2020

Design to operate in Two Frequency Bands by Division of the Coupled Region in a Waveguide 2-plane Hybrid-Coupler

CHEN S., 戸村崇, 広川二郎, 伊藤耕大, 菅瑞紀, 白戸裕史, 内田大誠, 北直樹

電子情報通信学会大会講演論文集(CD-ROM)   2020   2020

A new communication area formation method that extends from terrestrial to sky and sea

西森健太郎, 松田崇弘, 平栗健史, 広川二郎

電子情報通信学会大会講演論文集(CD-ROM)   2020   2020

Bandwidth Enhancement of Waveguide Coupler by Changing the Cross-Section of the Coupling Region in the Axial Direction

山川奨太, 戸村崇, 広川二郎

電子情報通信学会技術研究報告(Web)   120 ( 171(AP2020 31-67) )   2020

Control of the reception level in a touchless ticket gate using the millimeter-wave band waveguide slot array installed on the sides

黒瀬瑞輝, 戸村崇, 広川二郎

電子情報通信学会技術研究報告(Web)   120 ( 171(AP2020 31-67) )   2020

A Study of a Multi-layer Circularly Polarized Element for a Waveguide Corporate-feed Array

西本広希, 戸村崇, 広川二郎

電子情報通信学会技術研究報告(Web)   120 ( 171(AP2020 31-67) )   2020