Akihiko Hirata

According to our database, Akihiko Hirata authored at least 21 papers between 2005 and 2024.

Collaborative distances:

• Dijkstra number of five.
• Erdős number of four.

2024

Improvement of Channel Capacity of MIMO Communication Using Yagi-Uda Planar Antennas with a Propagation Path through a PVC Pipe Wall.

Akihiko Hirata, Keisuke Akiyama, Shunsuke Kabe, Hiroshi Murata, Masato Mizukami

IEICE Trans. Commun., January, 2024

2023

Evaluation of Transmission Characteristics of 120-GHz-Band Close-Proximity Wireless Links Using Split-Ring-Resonator Absorber Integrated Planar Slot Antenna.

Akihiko Hirata, Tubasa Saijo, Yuma Kawamoto, Tadao Nagatsuma, Issei Watanabe, Norihiko Sekine, Akifumi Kasamatsu

IEICE Trans. Electron., September, 2023

Small Pipe Inspection Robots with Wireless Communication Using Microwave Guided Modes Propagating Along a Pipe Wall.

Masato Mizukami, Masami Yamaguchi, Hiroshi Murata, Akihiko Hirata

Proceedings of the IEEE International Conference on Systems, Man, and Cybernetics, 2023

2021

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 Trans. Electron., 2021

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 Trans. Electron., 2021

2020

Contrast Enhancement of 76.5 GHz-Band Millimeter-Wave Images Using Near-Field Scattering for Non-Destructive Detection of Concrete Surface Cracks.

Akihiko Hirata, Makoto Nakashizuka, Koji Suizu, Yoshikazu Sudo

IEICE Trans. Electron., 2020

2018

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

Akihiko Hirata, Jiro Hirokawa

IEICE Trans. Electron., 2018

2017

Analysis and Experimental Study of Magnetic-Field Amplification by a Double Coil.

Ai-ichiro Sasaki, Olivier Ouellette, Maxime Beaudry-Marchand, Akihiko Hirata, Hiroki Morimura

IEEE Trans. Ind. Electron., 2017

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

Akihiko Hirata, Jun Takeuchi, Keisuke Hashimoto, Jiro Hirokawa

IEICE Trans. Commun., 2017

2015

Millimeter-wave system technologies for wireless communications, imaging, and sensing.

Akihiko Hirata

IEICE Electron. Express, 2015

2014

10-Gbit/s Bidirectional and 20-Gbit/s Unidirectional 2-ch Wireless Data Transmission System Using 120-GHz-Band Finline Orthomode Transducers.

Jun Takeuchi, Akihiko Hirata, Hiroyuki Takahashi, Naoya Kukutsu, Yoshiaki Yamada, Kei Kitamura, Mitsuhiro Teshima

IEICE Trans. Electron., 2014

A Finline Orthomode Transducer for 120-GHz-Band Wireless Links.

Jun Takeuchi, Akihiko Hirata, Hiroyuki Takahashi, Naoya Kukutsu

IEICE Trans. Electron., 2014

120-GHz-Band Amplifier Module with Hermetic Sealing Structure for 10-Gbit/s Wireless System.

Hiroyuki Takahashi, Toshihiko Kosugi, Akihiko Hirata, Jun Takeuchi, Koichi Murata, Naoya Kukutsu

IEICE Trans. Electron., 2014

10-Gbit/s close-proximity wireless system meeting the regulation for extremely low-power radio stations.

Hiroyuki Takahashi, Akihiko Hirata, Katsuhiro Ajito, Shintaro Hisatake, Tadao Nagatsuma

IEICE Electron. Express, 2014

2013

Evaluation of Interference between Parallel 120-GHz-Band Wireless Link Systems with High-Gain Cassegrain Antennas.

Jun Takeuchi, Akihiko Hirata, Hiroyuki Takahashi, Naoya Kukutsu

IEICE Trans. Electron., 2013

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

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

IEICE Trans. Commun., 2013

Broadband InP MMICs for 120 GHz wireless data communications.

Toshihiko Kosugi, Hiroyuki Takahashi, Akihiko Hirata, Koichi Murata

Proceedings of the 2013 IEEE Radio and Wireless Symposium, 2013

2012

10-Gbit/s Bi-directional wireless data transmission system using 120-GHz-band ortho-mode transducers.

Jun Takeuchi, Akihiko Hirata, Hiroyuki Takahashi, Naoya Kukutsu

Proceedings of the 2012 IEEE Radio and Wireless Symposium, 2012

2009

A 125-GHz 140-mW InGaAs/InP composite-channel HEMT MMIC power amplifier module.

Toshihiko Kosugi, Hiroki Sugiyama, Koichi Murata, Hiroyuki Takahashi, Akihiko Hirata, Naoya Kukutsu, Yuichi Kado, Takatomo Enoki

IEICE Electron. Express, 2009

2005

Low-Phase Noise Photonic Millimeter-Wave Generator Using an AWG Integrated with a 3-dB Combiner.

Akihiko Hirata, Hiroyoshi Togo, Naofumi Shimizu, Hiroshi Takahashi, Katsunari Okamoto, Tadao Nagatsuma

IEICE Trans. Electron., 2005

Over-10-dBm output uni-traveling-carrier photodiode module integrating a power amplifier for wireless transmissions in the 125-GHz band.

Hiroshi Ito, Tomofumi Furuta, Toshihiko Kosugi, Akihiko Hirata, Hiroyuki Takahashi, Yoshifumi Muramoto, Masami Tokumitsu, Yasuhiro Sato, Tadao Nagatsuma, Tadao Ishibashi

IEICE Electron. Express, 2005