| Presentation | 2019-10-24 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, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We propose a new efficiency enhancement technique of Doherty power amplifiers (DPAs) using virtual short stub. In this technique, the peaking amplifier branch is utilized as an inductive short stub at output power combing point at low power level. Using this technique, it is possible to transform the low-power load impedance seen from the carrier amplifier into higher impedance than that of classical DPAs. This leads to efficiency enhancement at larger power back-off than conventional DPAs (>6dB). The relation of efficiency enhanced level and the circuit topology for DPAs with the virtual short stub are analytically derived. The proposed technique was experimentally verified by fabricating a 3.5 GHz 40 Watt Doherty power amplifier using GaN HEMTs. An average drain efficiency of 51% and adjacent power leakage ratio of -50 dBc was obtained using 10MHz LTE test signals with 8.5dB peak-to-average power ratio. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Doherty power amplifiers / efficiency / power back-off / load modulation / virtual short stub / GaN |
| Paper # | EMCJ2019-40,MW2019-69,EST2019-48 |
| Date of Issue | 2019-10-17 (EMCJ, MW, EST) |
| Conference Information | |
| Committee | EMCJ / MW / EST / IEE-EMC |
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| Conference Date | 2019/10/24(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Tohoku Gakuin University(Conf. Room 2, Eng. Bldg. 1) |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | EMC, Microwave, Electromagnetic field simulation. |
| Chair | Kensei Oh(Nagoya Inst. of Tech.) / Yoshinori Kogami(Utsunomiya Univ.) / Akimasa Hirata(Nagoya Inst. of Tech.) / Ken-ichi Yamazaki(電中研) |
| Vice Chair | Atsuhiro Nishikata(Tokyo Inst. of Tech.) / Tadashi Kawai(Univ. of Hyogo) / Kensuke Okubo(Okayama Prefectural Univ.) / Shintaro Shinjo(Mitsubishi Electric) / Shinichiro Ohnuki(Nihon Univ.) / Masayuki Kimishima(Advantest) / Jun Shibayama(Hosei Univ.) |
| Secretary | Atsuhiro Nishikata(Tokyo Inst. of Tech.) / Tadashi Kawai(Denso) / Kensuke Okubo(Utsunomiya Univ.) / Shintaro Shinjo(Fujitsu Labs.) / Shinichiro Ohnuki(National Inst. of Tech.,Sendai College) / Masayuki Kimishima(Aoyama Gakuin Univ.) / Jun Shibayama(東北学院大) / (鉄道総研) |
| Assistant | Nami Sasaki(Seiwa Electric MFG) / Hiroyoshi Shida(Tokin EMC Engineering) / Sho Muroga(Akita Univ.) / Satoshi Yoshida(Kagoshima Univ.) / Kyoya Takano(Tokyo Univ. of Science) / Takahiro Ito(Nagoya Inst. of Tech.) / Kazuhiro Fujita(Fujitsu) / Takaaki Ibuchi(阪大) |
| Paper Information | |
| Registration To | Technical Committee on Electromagnetic Compatibility / Technical Committee on Microwaves / Technical Committee on Electronics Simulation Technology / Technical Meeting on Electromagnetic Compatibility |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Efficiency Enhancement of GaN Doherty Power Amplifier at Large Power Back-Off with Virtual Short Stub Technique |
| Sub Title (in English) | |
| Keyword(1) | Doherty power amplifiers |
| Keyword(2) | efficiency |
| Keyword(3) | power back-off |
| Keyword(4) | load modulation |
| Keyword(5) | virtual short stub |
| Keyword(6) | GaN |
| 1st Author's Name | Satoru Honda |
| 1st Author's Affiliation | Mitsubishi Electric Corporation(Mitsubishi Electric) |
| 2nd Author's Name | Shuichi Sakata |
| 2nd Author's Affiliation | Mitsubishi Electric Corporation(Mitsubishi Electric) |
| 3rd Author's Name | Yuji Komatsuzaki |
| 3rd Author's Affiliation | Mitsubishi Electric Corporation(Mitsubishi Electric) |
| 4th Author's Name | Shintaro Shinjo |
| 4th Author's Affiliation | Mitsubishi Electric Corporation(Mitsubishi Electric) |
| Date | 2019-10-24 |
| Paper # | EMCJ2019-40,MW2019-69,EST2019-48 |
| Volume (vol) | vol.119 |
| Number (no) | EMCJ-241,MW-242,EST-243 |
| Page | pp.pp.21-25(EMCJ), pp.21-25(MW), pp.21-25(EST), |
| #Pages | 5 |
| Date of Issue | 2019-10-17 (EMCJ, MW, EST) |