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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| WPT | 2023-03-16 11:50 |
Kyoto | Kyoto-Univ. (Uji campus) (Primary: On-site, Secondary: Online) |
Operating Analysis of Doherty-Outphasing Hybrid Power Amplifier on Saturation Region Daisuke Yasunobu, Ren Furumoto, kenjirou Nishikawa (Kagoshima Univ.)  WPT2022-33 |
In WiCoPT systems, which can transmit information and power simultaneously, modulated signals with high PAPR are used. T... [more] | WPT2022-33 pp.14-18 |
| 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 |
| MW | 2022-11-15 13:50 |
Nagasaki | Fukue-Bunka-Kaikan (Primary: On-site, Secondary: Online) |
Study on Power Consumption and Power Reduction of RF Power Amplifier in 5G Downlink System Yuki Takagi, Yoshichika Ohta (SB) MW2022-113 |
This paper proposes the estimation of power consumption of RF power amplifier in downlink (from base station to UE) comm... [more] | MW2022-113 pp.25-30 |
| ICD, SDM, ITE-IST [detail] | 2022-08-10 09:15 |
Online | [Invited Talk]
A 39-GHz CMOS Bi-Directional Doherty Phased-Array Beamformer Using Shared-LUT DPD with Inter-Element Mismatch Compensation Technique for 5G Base-Station Zheng Li, Jian Pang, Yi Zhang, Yudai Yamazaki, Qiaoyu Wang, Peng Luo, Weichu Chen, Yijing Liao, Minzhe Tang, Zhengyan Guo, Yun Wang, Xi Fu, Dongwon You (Tokyo Tech), Naoki Oshima, Shinichi Hori, Kazuaki Kunihiro (NEC), Atsushi Shirane, Kenichi Okada (Tokyo Tech) SDM2022-48 ICD2022-16 |
This work demonstrates a 39-GHz CMOS phased-array beamformer with the bi-directional Doherty PA-LNA. An inter-element mi... [more] | SDM2022-48 ICD2022-16 pp.64-67 |
|
| 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 |
| EMT, MW, OPE, EST, MWP, THz, IEE-EMT [detail] | 2020-07-17 14:15 |
Online | Online | Study on Series Connected Harmonic-Tuned GaN HEMT Doherty Power Amplifier for Directly Exciting a Loop Antenna of OAM communication with Balanced Mode Masahiro Nakada, Yoichiro Takayama, Ryo Ishikawa, Kazuhiko Honjo (UEC) EMT2020-24 MW2020-33 OPE2020-19 EST2020-24 MWP2020-24 |
A series-connected harmonic-tuned GaN HEMT Doherty amplifier (DA) has been developed for directly exciting a loop antenn... [more] | EMT2020-24 MW2020-33 OPE2020-19 EST2020-24 MWP2020-24 pp.101-106 |
| 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 |
| EMCJ, IEE-EMC, MW, EST [detail] | 2016-10-20 11:20 |
Miyagi | Tohoku Univ. | An RF Frontend Amplifier Module for High SHF Wide-band Massive MIMO in 5G Keigo Nakatani, Shintaro Shinjo, Yuji Komatsuzaki, Jun Kamioka, Ryota Komaru, Hideyuki Nakamizo, Miyawaki Katsumi, Koji Yamanaka (Mitsubishi Electric) EMCJ2016-64 MW2016-96 EST2016-60 |
A highly integrated RF frontend module including a three-stage power amplifier (PA), a two-stage low noise amplifier (LN... [more] | EMCJ2016-64 MW2016-96 EST2016-60 pp.25-30 |
| RCS, SAT (Joint) |
2015-08-17 13:35 |
Fukuoka | Fukuoka Univ. | [Invited Lecture]
High efficiency power amplifier for broadcast transmitter Keiichi Yamaguchi, Takaya Kitahara, Yoshimasa Egashira, Atsushi Yamaoka, Makoto Tanahashi (Toshiba) SAT2015-14 RCS2015-136 |
Power amplification with high efficiency and high linearity of the OFDM signal with high PAPR adopted with the digital t... [more] | SAT2015-14 RCS2015-136 pp.17-22(SAT), pp.25-30(RCS) |
| 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 |
| 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 |
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