| Presentation | 2017-07-21 An 80MHz Modulation Bandwidth High Efficiency Multi-band Envelope-Tracking Power Amplifier Using GaN Single-Phase Buck-Converter Shuichi Sakata, Sandro Lanfranco, Tapio Kolmonen, Olli Piirainen, Takanobu Fujiwara, Shintaro Shinjo, Peter Asbeck, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We report a high efficiency multi-band Envelope-Tracking Power Amplifier (ET-PA) that supports modulation bandwidth up to 80MHz using real-time digital predistortion (RT-DPD). The ET-PA consists of a broadband RF-PA and a single phase buck-converter. The RF-PA has maximum PAE over 50% from 0.7 to 2.1GHz in CW measurements. The buck-converter operates at 245.76MHz switching frequency, and attains 78% PAE for modulated signals with 6.5dB PAPR. Both RF-PA and buck converter were fabricated using a GaN HEMT process. The RT-DPD system can generate the input signals for both buck-converter and RF-PA, and capture the output signal for feedback. An FPGA is employed in the RT-DPD system to perform predistortion in a closed-loop fashion. The overall ET-PA achieves total efficiency of 32.1-35.5%, output power of 30-30.7dBm with 30V supply voltage over 0.9-2.15GHz. By using the RT-DPD, ACLR is improved to below -45dBc even under 80MHz modulated LTE signal with 6.5dB PAPR, maintaining high efficiency. To the authors’ best knowledge, this is the widest modulation bandwidth yet reported for an efficient and multi-band ET-PA. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | GaN / Power Amplifier / Switching-Mode Power Amplifier / Envelope Tracking |
| Paper # | EMT2017-31,MW2017-56,OPE2017-36,EST2017-33,MWP2017-33 |
| Date of Issue | 2017-07-13 (EMT, MW, OPE, EST, MWP) |
| Conference Information | |
| Committee | MWP / OPE / EMT / MW / EST / IEE-EMT |
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| Conference Date | 2017/7/20(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Obihiro Chamber of Commerce and Industry |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Light wave & Electromagnetic Wave Workshop |
| Chair | Tetsuya Kawanishi(Waseda Univ.) / Kazutoshi Kato(Kyushu Univ.) / Akira Hirose(Univ. of Tokyo) / Masahiro Muraguchi(TUC) / Hideaki Kimura(NTT) / Keiji Goto(National Defense Academy) |
| Vice Chair | Naoto Yoshimoto(Chitose Inst. of Science and Tech.) / Kouki Sato(Furukawa Electric Industries) / Koichi Hirayama(Kitami Inst. of Tech.) / Yoshinori Kogami(Utsunomiya Univ.) / Hiroshi Okazaki(NTTdocomo) / Kenichi Tajima(Mitsubishi Electric) / Akimasa Hirata(Nagoya Inst. of Tech.) / Shinichiro Ohnuki(Nihon Univ.) |
| Secretary | Naoto Yoshimoto(NICT) / Kouki Sato(Chiba Inst. of Tech.) / Koichi Hirayama(NTT) / Yoshinori Kogami(Kanagawa Inst. of Tech.) / Hiroshi Okazaki(Univ. of Hyogo) / Kenichi Tajima(Tokyo Metro. Coll. of Tech) / Akimasa Hirata(Tokyo Inst. of Tech.) / Shinichiro Ohnuki(HITACHI) / (Tohoku Univ.) |
| Assistant | Kosuke Nishimura(KDDI) / Kensuke Ikeda(CRIEPI) / Takuo Tanemura(Univ. of Tokyo) / Tsuyoshi Matsuoka(Kyushu Sangyo Univ.) / Satoshi Ono(Univ. of Electro-Comm.) / Mizuki Motoyoshi(Tohoku Univ.) / Takahiro Ito(Nagoya Inst. of Tech.) / Kazuhiro Fujita(Fujitsu) / Yoshihiro Naka(KUHW) |
| Paper Information | |
| Registration To | Technical Committee on Microwave and Millimeter-wave Photonics / Technical Committee on OptoElectronics / Technical Committee on Electromagnetic Theory / Technical Committee on Microwaves / Technical Committee on Electronics Simulation Technology / Technical Meeting on Electromagnetic Theory |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | An 80MHz Modulation Bandwidth High Efficiency Multi-band Envelope-Tracking Power Amplifier Using GaN Single-Phase Buck-Converter |
| Sub Title (in English) | |
| Keyword(1) | GaN |
| Keyword(2) | Power Amplifier |
| Keyword(3) | Switching-Mode Power Amplifier |
| Keyword(4) | Envelope Tracking |
| 1st Author's Name | Shuichi Sakata |
| 1st Author's Affiliation | Mitsubishi Electric Corporation(Mitsubishi Electric) |
| 2nd Author's Name | Sandro Lanfranco |
| 2nd Author's Affiliation | Nokia Bell Labs(Nokia Bell Labs) |
| 3rd Author's Name | Tapio Kolmonen |
| 3rd Author's Affiliation | Nokia Bell Labs(Nokia Bell Labs) |
| 4th Author's Name | Olli Piirainen |
| 4th Author's Affiliation | Nokia Bell Labs(Nokia Bell Labs) |
| 5th Author's Name | Takanobu Fujiwara |
| 5th Author's Affiliation | Mitsubishi Electric Corporation(Mitsubishi Electric) |
| 6th Author's Name | Shintaro Shinjo |
| 6th Author's Affiliation | Mitsubishi Electric Corporation(Mitsubishi Electric) |
| 7th Author's Name | Peter Asbeck |
| 7th Author's Affiliation | University of California, San Diego(Univ. of California, San Diego) |
| Date | 2017-07-21 |
| Paper # | EMT2017-31,MW2017-56,OPE2017-36,EST2017-33,MWP2017-33 |
| Volume (vol) | vol.117 |
| Number (no) | EMT-139,MW-140,OPE-141,EST-142,MWP-143 |
| Page | pp.pp.133-138(EMT), pp.133-138(MW), pp.133-138(OPE), pp.133-138(EST), pp.133-138(MWP), |
| #Pages | 6 |
| Date of Issue | 2017-07-13 (EMT, MW, OPE, EST, MWP) |