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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| MW | 2022-06-09 14:25 |
Nagano | Naganoken Nokyo Building (Nagano, Online) (Primary: On-site, Secondary: Online) |
A 4.5 GHz-Band GaN HEMT Outphasing Amplifier MMIC with Compact Output Combiner Ryo Ishikawa, Yoichiro Takayama, Kazuhiko Honjo (UEC)  MW2022-25 |
[more] | MW2022-25 pp.13-18 |
| ED, MW | 2022-01-27 15:30 |
Online | 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 |
| MW | 2020-12-10 13:15 |
Kanagawa | (Kanagawa, Online) (Primary: On-site, Secondary: Online) |
A 3.9-GHz-Band GaN HEMT Outphasing Power Amplifier with Reactance-Compensation Compact Combiner Ryoichi Ogasawara, Yoichiro Takayama, Ryo Ishikawa, Kazuhiko Honjo (UEC) MW2020-71 |
Recently, the need for large-capacity communications has increased in wireless communication systems due to the increase... [more] | MW2020-71 pp.1-6 |
| EMT, MW, OPE, EST, MWP, THz, IEE-EMT [detail] | 2020-07-17 14:15 |
Online | 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 |
| MW | 2019-11-14 15:35 |
Okinawa | Minami Daido Villa. Tamokuteki Koryu Center (Okinawa) | 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 |
| RCS, SR, SRW (Joint) |
2019-03-08 11:20 |
Kanagawa | YRP (Kanagawa) | Multi-Band RF Hardware Techniques for 5G Mobile Communication Systems Yasushi Yamao, Kazuhiko Honjo, Ryo Ishikawa, Yoichiro Takayama, Akira Saito (UEC) RCS2018-325 |
R & D of 5G mobile communication systems are intensively conducted as joint projects by industries, academia and the gov... [more] | RCS2018-325 pp.219-224 |
| EST, MW, EMCJ, IEE-EMC [detail] | 2018-10-18 16:35 |
Aomori | Hachinohe Chamber of Commerce and Industry(Hachinohe city, Aomori) (Aomori) | GaN HEMT Darlington Power Amplifier with Individual Bias Adjustment for High-Efficiency and Low-Distortion Characteristics Atsushi Kitamura, Yoichiro Takayama, Ryo Ishikawa, Kazuhiko Honjo (UEC) EMCJ2018-45 MW2018-81 EST2018-67 |
Multi-transistor configurations are widely applied for improving the performance of transistor amplifiers. In the multi-... [more] | EMCJ2018-45 MW2018-81 EST2018-67 pp.71-75 |
| MW | 2017-11-09 13:50 |
Okinawa | Miyakojima Marin Terminal Bldg. (Okinawa) | Effects of drain-gate feedback capacitance on output power and power efficiency of microwave power amplifier Yoichiro Takayama, Kazuhiko Honjo, Ryo Ishikawa (UEC) MW2017-120 |
(To be available after the conference date) [more] | MW2017-120 pp.45-49 |
| MW | 2017-11-09 14:35 |
Okinawa | Miyakojima Marin Terminal Bldg. (Okinawa) | Efficiency Improvement of Concurrent Dual-Band GaN HEMT Power Amplifier with Two amplification circuits and Duplexers Haruka Nishizawa, Yoichiro Takayama, Ryo Ishikawa, Kazuhiko Honjo (UEC) MW2017-123 |
[more] | MW2017-123 pp.61-66 |
| MW (2nd) |
2017-06-14 - 2017-06-16 |
Overseas | KMUTT, Bangkok, Thailand (Overseas) | 8.5 GHz-Band GaN HEMT High-Efficiency Power Amplifier with Harmonic Reactive Termination Haruka Nishizawa, Yoichiro Takayama, Ryo Ishikawa, Kazuhiko Honjo (UEC) |
In the 5th generation mobile communication (5G), the use of a higher frequency band is planned for large capacity commu-... [more] | |
| MW | 2016-12-15 11:30 |
Kanagawa | National Defense Academy (Kanagawa) | Large Signal Characteristics and Linearity Improvement for Single-GaN HEMT Dual-Band Power Amplifier in Concurrent Operation Mode Arisu Maruyama, Yoichiro Takayama, Ryo Ishikawa, Kazuhiko Honjo (UEC) MW2016-139 |
Power amplifiers that enable multi-access in the microwave band have not been studied in detail so far, and the behavior... [more] | MW2016-139 pp.41-46 |
| MW | 2016-12-15 13:00 |
Kanagawa | National Defense Academy (Kanagawa) | Concurrent Dual-Band Amplifier Consisting of Two Amplifier Units and Duplexers Haruka Nishizawa, Jun Enomoto, Yoichiro Takayama, Ryo Ishikawa, Kazuhiko Honjo (UEC) MW2016-140 |
[more] | MW2016-140 pp.47-52 |
| EMCJ, IEE-EMC, MW, EST [detail] | 2014-10-23 13:00 |
Akita | Akita Prefectural Univ. (Akita) | Broadband High-Efficiency C-band GaAs pHEMT MMIC Doherty Amplifier without Impedance Inverting Network Tsuyoshi Yoshida, Yoichiro Takayama, Ryo Ishikawa, Kazuhiko Honjo (UEC) EMCJ2014-47 MW2014-103 EST2014-61 |
[more] | EMCJ2014-47 MW2014-103 EST2014-61 pp.29-33 |
| MW | 2013-12-20 14:20 |
Saitama | Saitama Univ. (Saitama) | Compact Broadband Shunt-Connected Load Type GaN HEMT Doherty Amplifier without Quarter-Wave Impedance Inverting Network Yosuke Iguchi, Yoichiro Takayama, Ryo Ishikawa, Kazuhiko Honjo (UEC) MW2013-173 |
The conventional microwave Doherty power amplifier (DA) consist of a carrier amplifier (CA), a peaking amplifier (PA) an... [more] | MW2013-173 pp.121-126 |
| MW | 2012-12-13 13:30 |
Yamanashi | Univ. of Yamanashi (Yamanashi) | A 1.2-2.0 GHz-band GaAs pHEMT Cascode Power Amplifier MMIC Consisting of Independently Biased Transistors Satoshi Tasaki, Yoichiro Takayama, Ryo Ishikawa, Kazuhiko Honjo (UEC) MW2012-127 |
In cascode circuit configuration, a method to expand circuit design range by setting a DC bias node to a connection poin... [more] | MW2012-127 pp.1-6 |
| MW | 2012-11-21 13:30 |
Okinawa | (Okinawa) | Design Method for GHz-Band Harmonics Treatment High Efficiency Power Amplifiers Using MHz-Band Active Harmonics Load-Pull System Ryo Ishikawa, Yoichiro Takayama, Kazuhiko Honjo (UEC) MW2012-114 |
For advanced wireless communication systems and wireless power transmission applications, many types of ampli ers have b... [more] | MW2012-114 pp.1-6 |
| MW | 2012-11-21 14:00 |
Okinawa | (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 09:00 |
Tochigi | Utsunomiya Univ. (Tochigi) | A High-Efficiency Low-Distortion Cascode Power Amplifier Consisting of Independently Biased InGaP/GaAs HBTs Yuki Takagi, Yoichiro Takayama, Ryo Ishikawa, Kazuhiko Honjo (UEC) MW2012-81 |
A cascode power amplifier with independently biased InGaP/GaAs HBTs is proposed and its superior performance is confirme... [more] | MW2012-81 pp.1-6 |
| MW | 2012-10-18 09:20 |
Tochigi | Utsunomiya Univ. (Tochigi) | 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 | 2011-11-25 13:30 |
Okinawa | (Okinawa) | High efficiency, low distortion GaN HEMT cascode power amplifier consisting of independently biased transistors Ryo Ishikawa, Yoichiro Takayama, Kazuhiko Honjo (UEC) MW2011-121 |
A 1.9GHz cascode power amplifier consisting of independently biased AlGaN/GaN HEMTs was designed and fabricated for the ... [more] | MW2011-121 pp.47-52 |
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