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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 19 of 19  /   
Committee Date Time Place Paper Title / Authors Abstract Paper #
MW 2022-05-20
10:00
Kyoto Kyoto Univ.
(Primary: On-site, Secondary: Online)
A Basic Study of a Heat dissipation Coaxial to Waveguide Transition
Akimichi Hirota, Takeshi Oshima, Jun Nishihara, Hiroyuki Nonomura, Toru Fukasawa, Yoshio Inasawa (Mitsubishi Electric) MW2022-16
A coaxial to waveguide transition is used when signals are transmitted with low loss. When a large power is input to the... [more] MW2022-16
pp.8-12
AP 2017-05-18
12:50
Miyazaki Hotel MERIEGES Miniaturization of Excitation Phase Shift Circuit for Pattern Reconfigurable Array Antenna
Hikaru Watanabe, Yasuo Morimoto, Akimichi Hirota, Takashi Maruyama, Satoshi Yamaguchi, Toru Fukasawa, Hiroaki Miyashita (Mitsubishi Electric Corp.) AP2017-28
Active phased array antenna(APAA) is widely used for a radar system or a communication system because it has the attract... [more] AP2017-28
pp.31-36
EMCJ, IEE-EMC, MW, EST [detail] 2016-10-20
11:45
Miyagi Tohoku Univ. A Method for Reducing a Coupling between Feed Lines of an Array Antenna
Akimichi Hirota, Hikaru Watanabe, Naofumi Yoneda, Moriyasu Miyazaki (Mitsubishi Electric Corp.) EMCJ2016-65 MW2016-97 EST2016-61
In this paper, a method for reducing an unwanted coupling between feed lines of array antennas is presented. When patch ... [more] EMCJ2016-65 MW2016-97 EST2016-61
pp.31-34
MW 2016-05-19
15:25
Kyoto Kyoto Univ. A Directivity Enhancement for Directional Couplers Using Three-Conductor Coupled Lines
Hidehar Yoshioka, Akimichi Hirota, Hidenori Ishibashi, Naofumi Yoneda, Moriyasu Miyazaki (Mitsubishi) MW2016-10
In a coupled-line directional coupler formed on thin multi-layered substrates, it is difficult to match coupled-line cha... [more] MW2016-10
pp.7-10
AP 2016-03-11
11:50
Yamanashi Isawa Onsen (Kanpo no Yado) 2D Pattern Reconfigurable Array Antenna with Excitation Phase Difference Circuit
Hikaru Watanabe, Takashi Maruyama, Yasuo Morimoto, Akimichi Hirota, Satoshi Yamaguchi, Masataka Otsuka, Hiroaki Miyashita (Mitsubishi Electric Corp.) AP2015-221
A method to reduce the cost of a phased array antenna and to suppress grating lobes is well known as phased array antenn... [more] AP2015-221
pp.97-102
MW 2015-11-19
10:00
Okinawa Univ. of the Ryukyus A Fabricated X-band Hollow Stripline Filter Bank Using a Both-sides Etched Metal Plate
Akimichi Hirota, Tetsu Owada, Takashi Koide, Mitsunori Omote, Kazuhiro Miyamoto, Masahiko Komaki, Naofumi Yoneda (Mitsubishi Electric Corp.) MW2015-120
 [more] MW2015-120
pp.1-4
MW 2014-11-20
11:00
Nagasaki Nagasaki Univ. A Directivity Enhancement for Directional Couplers Using Additional Coupled Lines with Reverse-Phase Forward Couplings
Hideharu Yoshioka, Akimichi Hirota, Kazuya Yamamoto, Hidenori Ishibashi, Yukihiro Tahara (Mitsubishi Electric) MW2014-126
In a coupled-line directional coupler formed on thin multi-layered substrates, it is difficult to match coupled-line cha... [more] MW2014-126
pp.17-22
MW 2014-11-20
16:10
Nagasaki Nagasaki Univ. [Special Talk] Report on 2014 IEEE MTT-S International Microwave Symposium
Akimichi Hirota (Mitsubishi Electric), Masahiro Horibe (AIST), Masataka Ohira (Saitama Univ.), Takashi Shimizu (Utsunomiya Univ.), Keiichi Motoi (NEC), Ko Kanaya (Mitsubishi Electric) MW2014-134
This is a report on 2014 IEEE MTT-S International Microwave Symposium (IMS 2014) held at Tampa, Florida, USA on 1-6 June... [more] MW2014-134
pp.57-63
MW 2014-03-04
11:25
Ehime Ehime University A Power Combiner Allowing for the Variable Number of Input Ports
Akimichi Hirota, Yukihiro Tahara, Tetsu Owada, Yoshinori Yasunaga, Yuji Sakai, Moriyasu Miyazaki (Mitsubishi Electric) MW2013-200
A high power transmitter frequently consist of two or more amplifiers, and outputs of the amplifiers are combined by a p... [more] MW2013-200
pp.19-22
MW 2013-03-07
10:10
Hiroshima Hiroshima Univ. A Power Divider with Insensitivity to Resistance Values Using a Parallely-loaded Resistor Pair
Akimichi Hirota, Yukihiro Tahara, Hidenori Yukawa, Tetsu Owada, Yoshitsugi Yamaguchi, Moriyasu Miyazaki (Mitsubishi Electric) MW2012-170
In realizing an isolation resistor of the Wilkinson power divider by a resistance film, characteristics of the Wilkinson... [more] MW2012-170
pp.59-62
MW 2012-03-01
16:15
Saga Saga University [Special Talk] An Attendee Report on European Microwave Week 2011
Yasushi Horii (Kansai Univ.), Akimichi Hirota (Mitsubishi Electric), Chun-Ping Chen (Kanagawa Univ.), Kunihiro Kawai (NTT DOCOMO), Koji Yamanaka (Mitsubishi Electric), Ramesh Pokharel (Kyushu Univ.) MW2011-177
This is an attendee report on the international conference of European Microwave Week (EuMW) 2011, including a statistic... [more] MW2011-177
pp.53-60
MW 2010-11-25
15:20
Okinawa Tiruru A Wide Band Forward Coupler with A balanced Composite Right-/Left-Handed Transmission Line
Akimichi Hirota, Yukihiro Tahara, Naofumi Yoneda (Mitsubishi Electric Corp.) MW2010-110
Various coupled-line backward couplers using composite right-/left-handed transmission lines (CRLH TLs) have been previo... [more] MW2010-110
pp.27-31
MW 2009-11-19
16:00
Kagoshima Tanegashima [Special Talk] Report on 2009 IEEE MTT-S International Microwave Symposium
Hiroshi Okazaki (NTT DOCOMO), Kenjiro Nishikawa (NTT Corp.), Yasunori Suzuki (NTT DOCOMO), Kensuke Okubo (Okayama Pref. Univ.), Tetsuya Ueda (Kyoto Inst. of Tech.), Akimichi Hirota (Mitsubishi Electric Corp.), Hirokazu Kamoda (NHK), Yasuhiro Nakasha (FUJITSU LABORATORIES LTD.) MW2009-134
Report on 2009 IEEE MTT-S International Microwave Symposium held in Boston, MA, USA, is presented. [more] MW2009-134
pp.35-42
MW 2009-11-20
11:45
Kagoshima Tanegashima A Design Method of A Composite Right-/Left-Handed Transmission Line Forward Coupler with Shared Short Stubs
Akimichi Hirota, Yukihiro Tahara, Naofumi Yoneda (Mitsubishi Electric Corp.) MW2009-141
Various coupled-line backward couplers using composite right-/left-handed transmission lines (CRLH TLs) have been previo... [more] MW2009-141
pp.75-80
MW 2008-11-20
10:05
Nagasaki Nagasaki-Univ. A Composite Right-/Left-Handed Transmission Line Forward Coupler with Shared Short Stubs
Akimichi Hirota, Yukihiro Tahara, Naofumi Yoneda (Mitsubishi Electric Co.) MW2008-119
 [more] MW2008-119
pp.7-12
MW 2008-05-30
14:50
Kyoto Kyoto Univ. A Novel Coupled-Line Forward Coupler using Composite Right-/Left-Handed Transmission Lines
Akimichi Hirota, Yukihiro Tahara, Naofumi Yoneda (Mitsubishi Elc. Co.) MW2008-28
Various coupled-line backward couplers using composite right-/left-handed transmission lines (CRLH TLs) have been previo... [more] MW2008-28
pp.77-82
MW 2007-09-05
16:55
Tochigi Utsunomiya Univ. A Millimeter-wave Coaxial-to-Waveguide Transition using Crank-shaped Slot in the Narrow Wall of Rectangular Waveguide
Yukihiro Tahara, Akimichi Hirota, Tetsuya Oba, Satoshi Yamaguchi, Hideyuki Oh-hashi, Naofumi Yoneda (Mitsubishi Electric Corp.) MW2007-93
Coaxial-to-waveguide transitions are widely used for antenna feed network and power amplifier applications. We propose a... [more] MW2007-93
pp.67-70
AP, SAT
(Joint)
2006-05-19
15:15
Kagoshima Kagoshima Univ. Direction of Arrival Estimation for Number of Arrival Waves Exceeding Degree of Freedom
Naoki Ito, Akimichi Hirota, Hiroyuki Arai (Yokohama National Univ.) AP2006-29
The estimating of direction of arrival using array antennas is required to improve the propagation environment of mobile... [more] AP2006-29
pp.111-115
AP, SAT
(Joint)
2005-07-22
09:30
Hokkaido Hotel Taisetsu DOA Estimation System Using Virtual Rectangular Array with Eigenvectors
Akimichi Hirota, Hiroyuki Arai (Yokohama National Univ.), Masayuki Nakano (KDDI)
In this paper, a ‘T’ character-type array antenna system is proposed which estimates the directions of arrival (DOA) by ... [more] AP2005-56
pp.107-112
 Results 1 - 19 of 19  /   
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