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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| MW | 2024-03-01 14:05 |
Okayama | Okayama Prefectural University (Primary: On-site, Secondary: Online) |
[Special Talk]
An Analytical Design Method of Wideband Combiner for Handset Doherty Power Amplifier Shohei Imai, Hiroshi Okabe (Murata)  MW2023-194 |
The development of handset Doherty power amplifier (DPA) is currently focused on achieving high data rates and low power... [more] | MW2023-194 pp.99-103 |
| MW | 2023-03-02 13:25 |
Tottori | Tottori Univ. (Primary: On-site, Secondary: Online) |
Characteristic Improvement at Back-Off Region by Three-Power-Level Optimization for 3.7-GHz GaN HEMT Doherty Amplifier Masataka Yamamoto, Kazuhiko Honjo, Yoichiro Yakayama, Ryo Ishikawa (UEC) MW2022-163 |
Increasing the communication capacity and speed is required for recent wireless communication systems. Digital modulated... [more] | MW2022-163 pp.37-41 |
| WPT (2nd) |
2022-12-05 - 2022-12-06 |
Kyoto | Uji Obaku Plaza Kihada Hall, Uji Campus, Kyoto University (Primary: On-site, Secondary: Online) |
Hybrid power amplifier for WiCoPT WPT system Ren Furumoto, Daisuke Yasunobu, Kenjiro Nishikawa (Kagoshima Univ.) |
WiCoPT system, which can transfer data and power simultaneously, employs modulated signals. Therefore, a transmitter of ... [more] | |
| MW | 2022-11-15 13:25 |
Nagasaki | Fukue-Bunka-Kaikan (Primary: On-site, Secondary: Online) |
Doherty-Outphasing Hybrid power amplifier for WiCoPT WPT system Ren Furumoto, Daisuke Yasunobu, Kenjiro Nishikawa (Kagoshima Univ.) MW2022-112 |
WiCoPT system, which can transfer data and power simultaneously, employs modulated signals. Therefore, a transmitter of ... [more] | MW2022-112 pp.19-24 |
| ED, MW | 2022-01-27 15:30 |
Online | Online | [Invited Lecture]
A 28GHz-Band GaN HEMT Doherty Amplifier MMIC Based on Dual-Power-Level Design Technique Ryo Ishikawa, Takuya Seshimo, Yoichiro Takayama, Kazuhiko Honjo (UEC) ED2021-67 MW2021-109 |
In the 5G wireless communication system, a quasi-millimeter wave band such as the 28 GHz band is also used. Doherty powe... [more] | ED2021-67 MW2021-109 pp.28-31 |
| ED, MW | 2022-01-27 16:05 |
Online | Online | [Invited Talk]
Wideband Load Modulated GaN Power Amplifiers for Wireless Base-Stations Shuichi Sakata, Yuji Komatsuzaki, Kento Saiki, Koji Yamanaka, Masaomi Tsuru (Mitsubishi Electric) ED2021-68 MW2021-110 |
Recently, 5G commercial services which have features of high speed, large capacity and multi-connectivity have rolled ou... [more] | ED2021-68 MW2021-110 pp.32-37 |
| NS, ICM, CQ, NV (Joint) |
2019-11-21 09:55 |
Hyogo | Rokkodai 2nd Campus, Kobe Univ. | Deep Neural Network Based Distortion Compensation for Doherty Amplifiers Yoshimasa Egashira, Reina Hongyo, Keiichi Yamaguchi (Toshiba) CQ2019-89 |
The problem with Doherty amplifiers, which are high-efficiency power amplifiers, is the occurrence of complex memory dis... [more] | CQ2019-89 pp.7-12 |
| MW | 2019-11-14 15:35 |
Okinawa | Minami Daido Villa. Tamokuteki Koryu Center | High-Efficiency GaN HEMT Doherty Power Amplifier Based on Two-Power-Level Impedance Optimization including Harmonic Treatment Takuya Seshimo, Yoichiro Takayama, Ryo Ishikawa, Kazuhiko Honjo (UEC) MW2019-106 |
Further high efficiency and high functionality of power amplifier are required for the next generation wireless communic... [more] | MW2019-106 pp.35-39 |
| MW | 2019-11-14 16:00 |
Okinawa | Minami Daido Villa. Tamokuteki Koryu Center | High Efficiency Doherty Amplifier Using T-Shaped Stabs with Spurius Suppression and Impedance Conversion Function Yuki Takagi, Naoki Hasegawa, Yoshichika Ota (SB), Ryo Ishikawa, Kazuhiko Honjo (UEC) MW2019-107 |
In recent years, various types of wireless stations such as a base station used on quasi-millimeter wave band have been ... [more] | MW2019-107 pp.41-46 |
| EMCJ, MW, EST, IEE-EMC [detail] | 2019-10-24 10:55 |
Miyagi | Tohoku Gakuin University(Conf. Room 2, Eng. Bldg. 1) | Efficiency Enhancement of GaN Doherty Power Amplifier at Large Power Back-Off with Virtual Short Stub Technique Satoru Honda, Shuichi Sakata, Yuji Komatsuzaki, Shintaro Shinjo (Mitsubishi Electric) EMCJ2019-40 MW2019-69 EST2019-48 |
We propose a new efficiency enhancement technique of Doherty power amplifiers (DPAs) using virtual short stub. In this t... [more] | EMCJ2019-40 MW2019-69 EST2019-48 pp.21-25 |
| EMT, MW, OPE, MWP, EST, IEE-EMT [detail] | 2015-07-17 13:25 |
Hokkaido | Kushiro City Lifelong Learning Center | Dynamic AM/AM and AM/PM control of Doherty amplifier using tanh-shaped function Yuji Komatsuzaki, Hiroshi Otsuka, Hifumi Noto, Shintaro Shinjo, Koji Yamanaka, Yoshihiro Hamamatsu, Hiroshi Fukumoto (Mitsubishi Electric Corp.) EMT2015-47 MW2015-85 OPE2015-59 EST2015-51 MWP2015-50 |
Power amplifiers for communication systems require increasingly high efficiency at large back-off from saturated output ... [more] | EMT2015-47 MW2015-85 OPE2015-59 EST2015-51 MWP2015-50 pp.227-232 |
| 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 | 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 |
| 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 |
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