Generalized One-Dimensional Parallel Switching Matrices With an Arbitrary Number of Beams

by Jiro Hirokawa, Nelson J. G. Fonseca
Published 2021-01-01

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

by Takashi Tomura, Yuta Saito, Jiro Hirokawa
Published 2020-01-01

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

by Takashi Tomura, Jiro Hirokawa, Minoru Furukawa, Teruo Fujiwara, Naoki Shinohara
Published 2021-01-01

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

by Yaxiang Wu, Bolin Jiang, Miao Zhang, Jiro Hirokawa, Qing Huo Liu
Published 2020-01-01

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

by Naoki Matsumura, Kentaro Nishimori, Ryotaro Taniguchi, Takefumi Hiraguri, Takashi Tomura, Jiro Hirokawa
Published 2020-01-01

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

by Miao Zhang, Masahiro Wakasa, Koji Toyosaki, Kiyomichi Araki, Jiro Hirokawa, Makoto Ando
Published 2021-01-01

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

by Jiyu He, Yaxiang Wu, Dan Chen, Miao Zhang, Jiro Hirokawa, Qinghuo Liu
Published 2021-01-01

A 20-GHz-Band <inline-formula> <tex-math notation="LaTeX">$64\times64$ </tex-math></inline-formula> Hollow Waveguide Two-Dimensional Butler Matrix

by Takashi Tomura, Dong-Hun Kim, Masahiro Wakasa, Yuki Sunaguchi, Jiro Hirokawa, Kentaro Nishimori
Published 2019-01-01

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

by Budhaditya Pyne, Hirobumi Saito, Prilando Riziki Akbar, Jiro Hirokawa, Takashi Tomura, Koji Tanaka
Published 2020-01-01

Laser-Drilled All-Dielectric Huygens&#x2019; Transmit-Arrays as 120 GHz Band Beamformers

by Mohamed K. Emara, Sonya K. Stuhec-Leonard, Takashi Tomura, Jiro Hirokawa, Shulabh Gupta
Published 2020-01-01

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

by Xiaohe Cheng, Yuan Yao, Takashi Tomura, Jiro Hirokawa, Tao Yu, Junsheng Yu, Xiaodong Chen
Published 2018-01-01

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

by Xiaohe Cheng, Yuan Yao, Takashi Tomura, Jiro Hirokawa, Tao Yu, Junsheng Yu, Xiaodong Chen
Published 2018-01-01

Connecting Networks for Two-Dimensional Butler Matrices Generating a Triangular Lattice of Beams

by NELSON J. G. FONSECA, SOPHIE-ABIGAEL GOMANNE, PILAR CASTILLO-TAPIA, OSCAR QUEVEDO-TERUEL, TAKASHI TOMURA, JIRO HIROKAWA
Published 2021-01-01