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Akihiko Hirata
Researcher at Chiba Institute of Technology
Publications - 183
Citations - 3325
Akihiko Hirata is an academic researcher from Chiba Institute of Technology. The author has contributed to research in topics: Wireless & Antenna (radio). The author has an hindex of 29, co-authored 178 publications receiving 3075 citations. Previous affiliations of Akihiko Hirata include Nippon Telegraph and Telephone & University of Tokyo.
Papers
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Journal ArticleDOI
120-GHz-band millimeter-wave photonic wireless link for 10-Gb/s data transmission
Akihiko Hirata,Toshihiko Kosugi,Hiroyuki Takahashi,R. Yamaguchi,Nakajima Fumito,Tomofumi Furuta,Hiroshi Ito,H. Sugahara,Yasuhiro Sato,Tadao Nagatsuma +9 more
TL;DR: In this article, a 120-GHz-band wireless link that uses millimeter-wave photonic techniques was developed, which achieved error-free transmission of OC-192 and 10-GbE signals over a distance of more than 200 m with a received power of below -30 dBm.
Journal ArticleDOI
120-GHz wireless link using photonic techniques for generation, modulation, and emission of millimeter-wave signals
TL;DR: In this paper, the authors presented a wireless link system that uses millimeter-wave (MMW) photonic techniques, which consists of an optical 120-GHz MMW generator, an optical modulator, and a high-power photonic MMW emitter.
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120-GHz-Band Wireless Link Technologies for Outdoor 10-Gbit/s Data Transmission
Akihiko Hirata,Toshihiko Kosugi,H. Takahashi,Jun Takeuchi,Hiroyoshi Togo,Makoto Yaita,Naoya Kukutsu,K. Aihara,K. Murata,Yasuhiro Sato,Tadao Nagatsuma,Yuichi Kado +11 more
TL;DR: In this paper, the authors investigated the maximum output power of these devices and compared the phase noise of MMW signals generated by high-speed uni-traveling carrier photodiodes (UTC-PD) and InP high-electron mobility transistor (HEMT) millimeter-wave (MMW) monolithic integrated circuits (MMICs).
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10-Gbit/s Wireless Link Using InP HEMT MMICs for Generating 120-GHz-Band Millimeter-Wave Signal
Akihiko Hirata,R. Yamaguchi,Toshihiko Kosugi,H. Takahashi,K. Murata,Tadao Nagatsuma,Naoya Kukutsu,Yuichi Kado,N. Iai,Satoshi Okabe,S. Kimura,H. Ikegawa,H. Nishikawa,T. Nakayama,T. Inada +14 more
TL;DR: In this article, a 120-GHz-band mm-wave monolithic integrated circuits (MMICs) were fabricated using 0.1-mum-gate InP-HEMTs and coplanar waveguides.
Journal ArticleDOI
High-power photonic millimetre wave generation at 100 GHz using matching-circuit-integrated uni-travelling-carrier photodiodes
Hiroshi Ito,Tadao Nagatsuma,Akihiko Hirata,T. Minotani,Ai-ichiro Sasaki,Y. Hirota,Tadao Ishibashi +6 more
TL;DR: In this paper, a millimetre wave uni-travelling-carrier photodiode with a monolithically integrated matching (impedance transform) circuit utilising a coplanar-waveguide short stub is presented.