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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| EMCJ, WPT (Joint) |
2015-01-22 14:25 |
Okinawa | Okinawaken Ｊichikaikan | Inverse Doherty Rectifier Concept Proposal and Simulation Proof
-- Tolerant topology against DC load variation -- Yoichiro Miyazaki, Naoki Sakai, Takashi Ohira (Toyohashi Univ. of Tech.)  WPT2014-82 |
This paper presents novel topologies of Radio Frequency (RF) rectifier which suppresses deviation of input impedance $Z_... [more] | WPT2014-82 pp.25-29 |
| MW, ED | 2015-01-16 13:25 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | Digital Doherty Transmitter with Envelope ΔΣ Modulated Class-D GaN Amplifier for 800 MHz band Keiichi Motoi (NEC), Andreas Wentzel (FBH), Masaaki Tanio, Shinichi Hori, Makoto Hayakawa (NEC), Wolfgang Heinrich (FBH), Kazuaki Kunihiro (NEC) ED2014-131 MW2014-195 |
This paper presents a novel transmitter (Tx) architecture combining voltage-mode class-D power amplifiers (PAs) with an ... [more] | ED2014-131 MW2014-195 pp.83-88 |
| MW, ED | 2013-01-18 10:50 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | 2.6GHz Broadband 40W GaN HEMT Doherty Amplifier Norihiro Yoshimura, Naoki Watanabe, Hiroaki Deguchi, Norihiko Ui (SEDI) ED2012-120 MW2012-150 |
A 40W average output power asymmetric Doherty power amplifier (PA) for 2.6GHz band was developed using broadband inverse... [more] | ED2012-120 MW2012-150 pp.45-48 |
| MW | 2012-11-21 14:00 |
Okinawa | Proposals of compact broadband microwave Doherty amplifiers with generalized output-combining condition Yoichiro Takayama, Kazuhiko Honjo (Univ. of Electro-Comm.) MW2012-115 |
A Doherty amplifier usually consists of a carrier amplifier, peaking amplifier and an impedance inverting network. Micro... [more] | MW2012-115 pp.7-12 |
|
| MW | 2012-10-18 09:20 |
Tochigi | Utsunomiya Univ. | A Broadband Doherty Power Amplifier without a Quarter-Wave Impedance Inverting Network Shintaro Watanabe, Yoichiro Takayama, Ryo Ishikawa, Kazuhiko Honjo (UEC) MW2012-82 |
The microwave Doherty amplifier consists of a carrier amplifier(CA), a peaking amplifier(PA) and a quarter-wave impedanc... [more] | MW2012-82 pp.7-12 |
| MW | 2010-09-09 13:55 |
Tokyo | Tokyo Inst. of Tech. | Proposal of distortion reduction method for the GaN HEMT Doherty Power Amplifier with a Series Connected Load Satoshi Kawai, Yoichiro Takayama, Ryo Ishikawa, Kazuhiko Honjo (UEC) MW2010-67 |
Recently, much attention has been given to Doherty amplifiers as microwave power amplifiers that have the possibility of... [more] | MW2010-67 pp.7-12 |
| MW | 2009-09-25 14:50 |
Tokyo | Univ. of Electro-Communications | Design and Fabrication for a GaN HEMT Microwave Doherty Power Amplifier with a Series Connected Load Satoshi Kawai, Yoichiro Takayama, Ryo Ishikawa, Kazuhiko Honjo (UEC) MW2009-85 |
Doherty amplifiers are expected as a high-efficiency microwave power amplifier at a wide dynamic range. Doherty introduc... [more] | MW2009-85 pp.67-72 |
| RCS, SAT (Joint) |
2008-12-18 11:50 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | Power Efficiency of Extended Doherty Transmitter with Different Operational Class Amplifiers for OFDM signal amplification Yoshikazu Toyama, Yasushi Yamao (UEC) RCS2008-157 |
It is expected that extended Doherty transmitters achieve high power efficiency for signals with large peak power like O... [more] | RCS2008-157 pp.37-42 |
| MW | 2008-08-29 15:25 |
Osaka | Osaka-Univ. (Toyonaka) | Doherty power amplifier using GaN class-E device Takaaki Ishikawa, Kazunori Kashimura, Eiki Takahashi, Nobuyuki Adachi (JRC) MW2008-101 |
A Doherty amplifier for base stations using an internally class-E matched GaN packaged device has been developed. The cl... [more] | MW2008-101 pp.123-128 |
| SCE, MW | 2008-04-22 14:30 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | A Doherty Power Amplifier with a Series Connected Load Yoichiro Takayama, Kazuhiko Honjo (Univ. Electro-Comm.) SCE2008-9 MW2008-9 |
Doherty amplifiers are expected as a high-efficiency microwave power amplifier at wide output power back-off region. Doh... [more] | SCE2008-9 MW2008-9 pp.47-52 |
| RCS, SIP | 2008-01-25 11:45 |
Hiroshima | Hiroshima City Uni. | Power Efficiency of Doherty, Extended Doherty and Delta-Sigma Envelope Pulse-Width Modulation (EPWM) Transmitters for OFDM Signal Amplification Yoshikazu Toyama, Edwin M. Umali, Yasushi Yamao (UEC) SIP2007-168 RCS2007-171 |
OFDM achieves high spectral efficiency in wireless communication systems. However, it is difficult to achieve high power... [more] | SIP2007-168 RCS2007-171 pp.61-66 |
| ED, MW | 2008-01-16 14:25 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | GaN HEMT Doherty Amplifiers for W-CDMA and WiMAX Base Station Applications Hiroaki Sano, Norihiko Ui, Seigo Sano (Eudyna Devices) ED2007-209 MW2007-140 |
Two types of Doherty amplifiers for mobile communication base stations have been developed using GaN HEMTs biased at dra... [more] | ED2007-209 MW2007-140 pp.17-22 |
| MW, ED | 2007-01-19 10:10 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | A Distortion-Cancelled Doherty 28V Operated 330W GaAs Heterojunction FET Power Amplifier for Cellular Base Stations Isao Takenaka, Koji Ishikura, Hidemasa Takahashi, Koichi Hasegawa, Takashi Ueda, Toshimichi Kurihara, Kazunori Asano, Naotaka Iwata (NEC Electronics) |
A low distortion Doherty high-power amplifier has been developed for cellular base stations. The amplifier delivered 330... [more] | ED2006-227 MW2006-180 pp.149-154 |
| RCS, AP, WBS, MW, MoNA | 2005-03-04 16:40 |
Kanagawa | Yokosuka Research Park | Performance of a Doherty Amplifier with an Adaptive Predistorter for Peak Power reduced CDM signals Motonori Iwata, Yoshihiko Akaiwa (Kyushu Univ.), Tetsuji Harada, Yoichiro Takayama (Univ. of Hyogo) |
The Doherty amplifier is a technique to realize a high power efficiency over a wide input level. However, it is known th... [more] | WBS2004-141 AP2004-322 RCS2004-409 MoMuC2004-192 MW2004-319 pp.115-120 |
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