Akihiko Hirata

24 papers B 1Journal 21Unranked 2
YearRankTypeTitle / Venue / Authors
2025 J jnl
Evaluation of Interference between 300 GHz Band Fronthaul Links Using Measured High Gain Antenna Radiation Patterns.
IEICE Trans. Commun.
Ken Watanabe, Ryo Okumura, Akihiko Hirata, Thomas Kürner
2024 J jnl
10-Gbit/s Data Transmission Using 120-GHz-Band Contactless Communication with SRR Integrated Glass Substrate.
IEICE Trans. Electron.
Tomohiro Kumaki, Akihiko Hirata, Tubasa Saijo, Yuma Kawamoto, Tadao Nagatsuma, Osamu Kagaya
2024 J jnl
300-GHz-Band Dual-Band Bandstop Filter Based on Two Different Sized Split Ring Resonators.
IEICE Trans. Electron.
Akihiko Hirata
2024 J jnl
Improvement of Channel Capacity of MIMO Communication Using Yagi-Uda Planar Antennas with a Propagation Path through a PVC Pipe Wall.
IEICE Trans. Commun.
Akihiko Hirata, Keisuke Akiyama, Shunsuke Kabe, Hiroshi Murata, Masato Mizukami
2023 J jnl
Evaluation of Transmission Characteristics of 120-GHz-Band Close-Proximity Wireless Links Using Split-Ring-Resonator Absorber Integrated Planar Slot Antenna.
IEICE Trans. Electron.
Akihiko Hirata, Tubasa Saijo, Yuma Kawamoto, Tadao Nagatsuma, Issei Watanabe, Norihiko Sekine, Akifumi Kasamatsu
2023 B conf
Small Pipe Inspection Robots with Wireless Communication Using Microwave Guided Modes Propagating Along a Pipe Wall.
SMC
Masato Mizukami, Masami Yamaguchi, Hiroshi Murata, Akihiko Hirata
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
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
Contrast Enhancement of 76.5 GHz-Band Millimeter-Wave Images Using Near-Field Scattering for Non-Destructive Detection of Concrete Surface Cracks.
IEICE Trans. Electron.
Akihiko Hirata, Makoto Nakashizuka, Koji Suizu, Yoshikazu Sudo
2018 J jnl
Absorber Integrated Planar Slot Array Antenna for Suppression of Multiple Reflection in 120-GHz-Band Close-Proximity Wireless System.
IEICE Trans. Electron.
Akihiko Hirata, Jiro Hirokawa
2017 J jnl
Alignment Control System Using Beam-Tilting 1-D Waveguide-Slot Array Antennas for 120-GHz-Band Corporate-Feed High-Gain 2-D Arrays.
IEICE Trans. Commun.
Akihiko Hirata, Jun Takeuchi, Keisuke Hashimoto, Jiro Hirokawa
2017 J jnl
Analysis and Experimental Study of Magnetic-Field Amplification by a Double Coil.
IEEE Trans. Ind. Electron.
Ai-ichiro Sasaki, Olivier Ouellette, Maxime Beaudry-Marchand, Akihiko Hirata, Hiroki Morimura
2015 J jnl
Millimeter-wave system technologies for wireless communications, imaging, and sensing.
IEICE Electron. Express
Akihiko Hirata
2014 J jnl
10-Gbit/s Bidirectional and 20-Gbit/s Unidirectional 2-ch Wireless Data Transmission System Using 120-GHz-Band Finline Orthomode Transducers.
IEICE Trans. Electron.
Jun Takeuchi, Akihiko Hirata, Hiroyuki Takahashi, Naoya Kukutsu, Yoshiaki Yamada, Kei Kitamura, Mitsuhiro Teshima
2014 J jnl
10-Gbit/s close-proximity wireless system meeting the regulation for extremely low-power radio stations.
IEICE Electron. Express
Hiroyuki Takahashi, Akihiko Hirata, Katsuhiro Ajito, Shintaro Hisatake, Tadao Nagatsuma
2014 J jnl
120-GHz-Band Amplifier Module with Hermetic Sealing Structure for 10-Gbit/s Wireless System.
IEICE Trans. Electron.
Hiroyuki Takahashi, Toshihiko Kosugi, Akihiko Hirata, Jun Takeuchi, Koichi Murata, Naoya Kukutsu
2014 J jnl
A Finline Orthomode Transducer for 120-GHz-Band Wireless Links.
IEICE Trans. Electron.
Jun Takeuchi, Akihiko Hirata, Hiroyuki Takahashi, Naoya Kukutsu
2013 — conf
Broadband InP MMICs for 120 GHz wireless data communications.
RWS
Toshihiko Kosugi, Hiroyuki Takahashi, Akihiko Hirata, Koichi Murata
2013 J jnl
Design and Measurement of the Plate Laminated Waveguide Slot Array Antenna and Its Feasibility for Wireless Link System in the 120 GHz Band.
IEICE Trans. Commun.
Dongjin Kim, Jiro Hirokawa, Kimio Sakurai, Makoto Ando, Takuma Takada, Tadao Nagatsuma, Jun Takeuchi, Akihiko Hirata
2013 J jnl
Evaluation of Interference between Parallel 120-GHz-Band Wireless Link Systems with High-Gain Cassegrain Antennas.
IEICE Trans. Electron.
Jun Takeuchi, Akihiko Hirata, Hiroyuki Takahashi, Naoya Kukutsu
2012 — conf
10-Gbit/s Bi-directional wireless data transmission system using 120-GHz-band ortho-mode transducers.
RWS
Jun Takeuchi, Akihiko Hirata, Hiroyuki Takahashi, Naoya Kukutsu
2009 J jnl
A 125-GHz 140-mW InGaAs/InP composite-channel HEMT MMIC power amplifier module.
IEICE Electron. Express
Toshihiko Kosugi, Hiroki Sugiyama, Koichi Murata, Hiroyuki Takahashi, Akihiko Hirata, Naoya Kukutsu, Yuichi Kado, Takatomo Enoki
2005 J jnl
Low-Phase Noise Photonic Millimeter-Wave Generator Using an AWG Integrated with a 3-dB Combiner.
IEICE Trans. Electron.
Akihiko Hirata, Hiroyoshi Togo, Naofumi Shimizu, Hiroshi Takahashi, Katsunari Okamoto, Tadao Nagatsuma
2005 J jnl
Over-10-dBm output uni-traveling-carrier photodiode module integrating a power amplifier for wireless transmissions in the 125-GHz band.
IEICE Electron. Express
Hiroshi Ito, Tomofumi Furuta, Toshihiko Kosugi, Akihiko Hirata, Hiroyuki Takahashi, Yoshifumi Muramoto, Masami Tokumitsu, Yasuhiro Sato, Tadao Nagatsuma, Tadao Ishibashi