Takashi Tomura

39 papers C 1Journal 32Unranked 6
YearRankTypeTitle / Venue / Authors
2026 J jnl
A 142-164-GHz Phased-Array AiP Module With High-Power-Density and High-Efficiency Transceiver in 65-nm CMOS for 6G UE.
IEEE J. Solid State Circuits
Yudai Yamazaki, Yohei Morishita, Sunghwan Park, Takaya Uchino, Chenxin Liu, Jun Sakamaki, Akihiro Egami, Ryosuke Hasaba, Ken Takahashi, Tomoki Abe, Tomohiro Murata, Yoichi Nakagawa, Takashi Tomura, Hiroshi Taneda, Kei Murayama, Makoto Tsukahara, Hiroko Ota, Yoko Nakabayashi, Ryuji Kinugawa, Takumi Kojima, Anyi Tian, Kotaro Ito, Chun Wang, Hans Herdian, Yi Zhang, Zheng Li, Wenqian Wang, Hongye Huang, Dingxin Xu, Sena Kato, Michihiro Ide, Shinsuke Hara, Issei Watanabe, Akifumi Kasamatsu, Yuncheng Zhang, Hiroyuki Sakai, Kazuaki Kunihiro, Atsushi Shirane, Koji Takinami, Kenichi Okada
2026 J jnl
A Power-Efficient K-Band Circular Polarized 256-Element CMOS Phased-Array Transmitter With Coupler-End Structure for LEO Satellite Terminal.
IEEE J. Solid State Circuits
Xiaolin Wang, Dongwon You, Xi Fu, Takeshi Ota, Michihiro Ide, Sena Kato, Jill C. Mayeda, Makoto Higaki, Jumpei Sudo, Hiroshi Takizawa, Masashi Shirakura, Takashi Tomura, Hiroyuki Sakai, Kazuaki Kunihiro, Kenichi Okada, Atsushi Shirane
2025 — conf
11.1 A 256-Element Ka-Band CMOS Phased-Array Receiver Using Switch-Type Quadrature-Hybrid-First Architecture for Small Satellite Constellations.
ISSCC
Sena Kato, Jill C. Mayeda, Keito Yuasa, Michihiro Ide, Takeshi Ota, Shu Date, Yudai Yamazaki, Xiaolin Wang, Xi Fu, Dongwon You, Makoto Higaki, Jumpei Sudo, Hiroshi Takizawa, Masashi Shirakura, Takashi Tomura, Hiroyuki Sakai, Kazuaki Kunihiro, Kenichi Okada, Atsushi Shirane
2025 J jnl
A 122 GHz Wirelessly Powered Active Reflector for D-Band Communications.
IEEE Solid State Circuits Lett.
Michihiro Ide, Keito Yuasa, Sena Kato, Shu Date, Takashi Tomura, Kenichi Okada, Atsushi Shirane
2025 J jnl
A 640-Gb/s 4 × 4-MIMO D-Band CMOS Transceiver Chipset.
IEEE J. Solid State Circuits
Chenxin Liu, Zheng Li, Yudai Yamazaki, Hans Herdian, Chun Wang, Anyi Tian, Jun Sakamaki, Han Nie, Xi Fu, Sena Kato, Wenqian Wang, Hongye Huang, Minzhe Tang, Dingxin Xu, Shinsuke Hara, Akifumi Kasamatsu, Takashi Tomura, Hiroyuki Sakai, Kazuaki Kunihiro, Atsushi Shirane, Kenichi Okada
2025 J jnl
A LEO Satellite Mounted 256-Element 19 GHz CMOS Phased-Array Transmitter With On-Chip Amplitude and Phase Monitor.
IEEE Access
Xiaolin Wang, Dongwon You, Xi Fu, Gao Yuan, Takeshi Ota, Jill C. Mayeda, Jun Sakamaki, Ashbir Aviat Fadila, Makoto Higaki, Jumpei Sudo, Hiroshi Takizawa, Masashi Shirakura, Takashi Tomura, Hiroyuki Sakai, Kazuaki Kunihiro, Kenichi Okada, Atsushi Shirane
2024 — conf
A 28GHz 5G NR Wirelessly Powered Relay Transceiver Using Rectifier-Type 4th-Order Sub-Harmonic Mixer.
VLSI Technology and Circuits
Sena Kato, Shu Date, Tao Ruoxin, Yasuto Narukiyo, Hiroki Hayashi, Keito Yuasa, Michihiro Ide, Takashi Tomura, Kenichi Okada, Atsushi Shirane
2024 J jnl
An Inverted-L Monopole Array With High Beam Coverage for Antenna-in-Package Modules at the 151.5-164 GHz Band.
IEEE Access
Alberto Hernández-Escobar, Takashi Tomura, Ryosuke Hasaba, Hiroshi Taneda, Issei Watanabe
2024 J jnl
Effective Design of an Array of Coupling Slots With a Reflection-Canceling Wall for a Parallel-Plate Slot Array Antenna.
IEEE Access
Tianyu Wang, Takashi Tomura, Jiro Hirokawa
2024 — conf
No Victim Left Behind: Developing a Dual-Use LEO Satellite System for Real-Time Population Mapping and Everyday Connectivity.
ISCIT
Takumi Ohashi, Futo Noda, Takashi Tomura, Ampan Laosunthara, Koudai Suzuki, Yuno Tanaka, Maki Kishimoto, Rie Seto, Hiraku Sakamoto, Gia Khanh Tran, Atsushi Shirane
2024 J jnl
Stretchable-Substrate-Impregnated Fabric: Deployable Reflectarray Antennas for CubeSats.
IEEE Access
Masato Machida, Takashi Tomura, Hiraku Sakamoto, Tomohiro Fukao
2023 — conf
A 2.95mW/element Ka-band CMOS Phased-Array Receiver Utilizing On-Chip Distributed Radiation Sensors in Low-Earth-Orbit Small Satellite Constellation.
ISSCC
Xi Fu, Dongwon You, Xiaolin Wang, Michihiro Ide, Yuncheng Zhang, Jun Sakamaki, Ashbir Aviat Fadila, Zheng Li, Yun Wang, Jumpei Sudo, Makoto Higaki, Soichiro Inoue, Takashi Eishima, Takashi Tomura, Jian Pang, Hiroyuki Sakai, Kenichi Okada, Atsushi Shirane
2023 J jnl
A Center-Fed Dual-Polarized Parallel-Plate Waveguide Slot Array Antenna Based on a Feeding Waveguide With Centered Longitudinal Feeding Slots.
IEEE Access
Huanqian Xiong, Jiro Hirokawa, Takashi Tomura
2023 J jnl
A Low-Power 256-Element Ka-Band CMOS Phased-Array Receiver With On-Chip Distributed Radiation Sensors for Small Satellite Constellations.
IEEE J. Solid State Circuits
Xi Fu, Dongwon You, Xiaolin Wang, Yun Wang, Carolyn Jill Mayeda, Yuan Gao, Michihiro Ide, Yuncheng Zhang, Jun Sakamaki, Ashbir Aviat Fadila, Zheng Li, Jumpei Sudo, Makoto Higaki, Soichiro Inoue, Takashi Eishima, Takashi Tomura, Jian Pang, Hiroyuki Sakai, Kenichi Okada, Atsushi Shirane
2023 — conf
A Small-Satellite-Mounted 256-Element Ka-Band CMOS Phased-Array Transmitter Achieving 63.8dBm EIRP Under 26.6W Power Consumption Using Single/Dual Circular Polarization Active Coupler.
ISSCC
Dongwon You, Xi Fu, Xiaolin Wang, Yuan Gao, Wenqian Wang, Jun Sakamaki, Hans Herdian, Sena Kato, Michihiro Ide, Yuncheng Zhang, Ashbir Aviat Fadila, Zheng Li, Chun Wang, Yun Wang, Jumpei Sudo, Makoto Higaki, Nahoka Kawaguchi, Masaya Nitta, Soichiro Inoue, Takashi Eishima, Takashi Tomura, Jian Pang, Hiroyuki Sakai, Kenichi Okada, Atsushi Shirane
2023 J jnl
A Two-Dimensional 6×4-Way Hollow Waveguide Beam-Switching Matrix.
IEEE Access
Qi Li, Jiro Hirokawa, Takashi Tomura, Yuta Takahashi, Naoki Kita, Nelson J. G. Fonseca
2022 J jnl
A Wideband and High-Gain All-Metallic Perpendicular-Corporate-Fed Multi-Layered Parallel-Plate Slot Array Antenna.
IEEE Access
Shuang Ji, Jiro Hirokawa, Takashi Tomura
2022 J jnl
Control of Radiation Direction in an Aperture Array Excited by a Waveguide 2-Plane Hybrid Coupler.
IEICE Trans. Commun.
Yuki Sunaguchi, Takashi Tomura, Jiro Hirokawa
2022 J jnl
Design for Operation in Two Frequency Bands by Division of the Coupled Region in a Waveguide 2-Plane Coupler.
IEICE Trans. Electron.
Shihao Chen, Takashi Tomura, Jiro Hirokawa, Kota Ito, Mizuki Suga, Yushi Shirato, Daisei Uchida, Naoki Kita
2021 J jnl
Control of 120-GHz-Band Split Ring Resonator Filter by Coupling Lattice Pattern Substrate.
IEICE Trans. Electron.
Koichiro Itakura, Akihiko Hirata, Masato Sonoda, Taiki Higashimoto, Tadao Nagatsuma, Takashi Tomura, Jiro Hirokawa, Norihiko Sekine, Issei Watanabe, Akifumi Kasamatsu
2021 J jnl
Proof-of-Concept on Misalignment Compensation for 5.8-GHz-Band Reflectarray Antennas by Varactor Diodes.
IEEE Access
Keisuke Omoto, Takashi Tomura, Hiraku Sakamoto
2021 J jnl
Transmission Characteristics Control of 120 GHz-Band Bandstop Filter by Coupling Alignment-Free Lattice Pattern.
IEICE Trans. Electron.
Akihiko Hirata, Koichiro Itakura, Taiki Higashimoto, Yuta Uemura, Tadao Nagatsuma, Takashi Tomura, Jiro Hirokawa, Norihiko Sekine, Issei Watanabe, Akifumi Kasamatsu
2020 J jnl
8 × 2-Element 60-GHz-Band Circularly Polarized Post-Wall Waveguide Slot Array Antenna Loaded With Dipoles.
IEEE Access
Takashi Tomura, Yuta Saito, Jiro Hirokawa
2020 J jnl
Development and Performance Evaluation of Small SAR System for 100-kg Class Satellite.
IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens.
Pyne Budhaditya, Hirobumi Saito, Prilando Riziki Akbar, Jiro Hirokawa, Takashi Tomura, Koji Tanaka
2020 J jnl
Experimental Evaluation of Intersymbol Interference in Non-Far Region Transmission using a Large Array Antenna in the Millimeter-Wave Band.
IEICE Trans. Commun.
Tuchjuta Ruckkwaen, Takashi Tomura, Kiyomichi Araki, Jiro Hirokawa, Makoto Ando
2020 J jnl
Laser-Drilled All-Dielectric Huygens' Transmit-Arrays as 120 GHz Band Beamformers.
IEEE Access
Mohamed K. Emara, Sonya K. Stuhec-Leonard, Takashi Tomura, Jiro Hirokawa, Shulabh Gupta
2020 J jnl
Novel Unmanned Aerial Vehicle-Based Line-of-Sight MIMO Configuration Independent of Transmitted Distance Using Millimeter Wave.
IEEE Access
Naoki Matsumura, Kentaro Nishimori, Ryotaro Taniguchi, Takefumi Hiraguri, Takashi Tomura, Jiro Hirokawa
2020 J jnl
Sidelobe Suppression in Both the E and H Planes Using Slit Layers over a Corporate-Feed Waveguide Slot Array Antenna Consisting of 2×2-Element Radiating Units.
IEICE Trans. Commun.
Haruka Arakawa, Takashi Tomura, Jiro Hirokawa
2020 J jnl
Transmission Enhancement in Rectangular-Coordinate Orthogonal Multiplexing by Excitation Optimization of Slot Arrays for a Given Distance in the Non-Far Region Communication.
IEICE Trans. Commun.
Ryotaro Ohashi, Takashi Tomura, Jiro Hirokawa
2019 J jnl
A 20-GHz-Band 64 × 64 Hollow Waveguide Two-Dimensional Butler Matrix.
IEEE Access
Takashi Tomura, Dong-Hun Kim, Masahiro Wakasa, Yuki Sunaguchi, Jiro Hirokawa, Kentaro Nishimori
2019 J jnl
A PCB-Integratable Metal Cap Slot Antenna for 60-GHz Band Mobile Terminals.
IEICE Trans. Commun.
Takashi Tomura, Haruhisa Hirayama, Jiro Hirokawa
2019 C conf
Development of Compact SAR Systems for Small Satellite.
IGARSS
Hirobumi Saito, Koichi Ijichi, Jiro Hirokawa, Takashi Tomura, Prilando Rizki Akbar, Pyne Budhaditya, Koji Tanaka, Makoto Mita, Tomoki Kaneko, Hiromi Watanabe
2019 — conf
Millimeter Wave Antenna for Information Shower: Design Choices and Performance.
EuCNC
Sergio Barberis, Daniele Disco, Roberto Vallauri, Takashi Tomura, Jiro Hirokawa
2019 J jnl
Perpendicular-Corporate Feed in a Four-Layer Circularly-Polarized Parallel-Plate Slot Array.
IEICE Trans. Commun.
Hisanori Irie, Takashi Tomura, Jiro Hirokawa
2019 J jnl
Wideband Design of a Short-Slot 2-Plane Coupler by the Mode Matching/FEM Hybrid Analysis Considering the Structural Symmetry.
IEICE Trans. Commun.
Masahiro Wakasa, Dong-Hun Kim, Takashi Tomura, Jiro Hirokawa
2018 J jnl
A Compact Multi-Beam End-Fire Circularly Polarized Septum Antenna Array for Millimeter-Wave Applications.
IEEE Access
Xiaohe Cheng, Yuan Yao, Takashi Tomura, Jiro Hirokawa, Tao Yu, Junsheng Yu, Xiaodong Chen
2018 J jnl
Millimeter-Wave Frequency Beam Scanning Array With a Phase Shifter Based on Substrate-Integrated-Waveguide.
IEEE Access
Xiaohe Cheng, Yuan Yao, Takashi Tomura, Jiro Hirokawa, Tao Yu, Junsheng Yu, Xiaodong Chen
2017 J jnl
Simultaneous Optimal Design Method of Primary Radiator and Main Reflector for Shaped Beam Antennas.
IEICE Trans. Commun.
Takashi Tomura, Michio Takikawa, Yoshio Inasawa, Hiroaki Miyashita
2014 J jnl
A Wideband 16×16-Element Corporate-Feed Hollow-Waveguide Slot Array Antenna in the 60-GHz Band.
IEICE Trans. Commun.
Takashi Tomura, Jiro Hirokawa, Takuichi Hirano, Makoto Ando