| Presentation | 2017-10-20 A Quadrature-modulation EPWM Transmitter That Uses Co-phase Sine Wave Carriers for I/Q Channel and a 90° Hybrid as a Signal Combiner Tomoaki Morita, Ryo Sakai, Yohtaro Umeda, Yusuke Kozawa, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Quadrature-modulation (QM) envelope-pulse-width modulation (EPWM) transmitter with a 180° hybrid as a power combiner has been proposed to suppress the switching loss due to the breaking of zero-current switching (ZCS) condition and, therefore, to increase the power efficiency. However, we found that the ZCS condition breaking still remains in I-channel of this transmitter. As a result, the power efficiency for I-ch decreases. To solve this problem we propose a QM-EPWM transmitter that uses sine-wave carriers for both I- and Q-channel with a 90° hybrid in this paper. The proposed transmitter eliminates the remaining switching loss due to the phase shift of the carrier in I-channel and increase the power efficiency. The increase in power efficiency of the proposed transmitter from the previous one is evaluated by computer simulation. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | transmitter / power amplifier / class-D / envelope pulse-width modulation / quadrature modulation / power-added efficiency / zero current switching / 90° hybrid |
| Paper # | EMCJ2017-45,MW2017-97,EST2017-60 |
| Date of Issue | 2017-10-12 (EMCJ, MW, EST) |
| Conference Information | |
| Committee | MW / EMCJ / EST / IEE-EMC |
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| Conference Date | 2017/10/19(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Yupopo |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Electromagnetic simulation ，EMC, Microwave technologies |
| Chair | Masahiro Muraguchi(TUC) / Osami Wada(Kyoto Univ.) / Hideaki Kimura(NTT) / 山崎 健一(電中研) |
| Vice Chair | Yoshinori Kogami(Utsunomiya Univ.) / Hiroshi Okazaki(NTTdocomo) / Kenichi Tajima(Mitsubishi Electric) / Kensei Oh(Nagoya Inst. of Tech.) / Akimasa Hirata(Nagoya Inst. of Tech.) / Shinichiro Ohnuki(Nihon Univ.) |
| Secretary | Yoshinori Kogami(Tokyo Inst. of Tech.) / Hiroshi Okazaki(HITACHI) / Kenichi Tajima(AIST) / Kensei Oh(Mitsubishi Electric) / Akimasa Hirata(Tohoku Univ.) / Shinichiro Ohnuki(CIST) / (東北学院大) |
| Assistant | Satoshi Ono(Univ. of Electro-Comm.) / Mizuki Motoyoshi(Tohoku Univ.) / Shinichiro Yamamoto(Univ. of Hyogo) / Chie Sasaki(Panasonic) / Shinobu Nagasawa(Mitsubishi Electric) / Takahiro Ito(Nagoya Inst. of Tech.) / Kazuhiro Fujita(Fujitsu) / 井渕 貴章(阪大) |
| Paper Information | |
| Registration To | Technical Committee on Microwaves / Technical Committee on Electromagnetic Compatibility / 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) | A Quadrature-modulation EPWM Transmitter That Uses Co-phase Sine Wave Carriers for I/Q Channel and a 90° Hybrid as a Signal Combiner |
| Sub Title (in English) | |
| Keyword(1) | transmitter |
| Keyword(2) | power amplifier |
| Keyword(3) | class-D |
| Keyword(4) | envelope pulse-width modulation |
| Keyword(5) | quadrature modulation |
| Keyword(6) | power-added efficiency |
| Keyword(7) | zero current switching |
| Keyword(8) | 90° hybrid |
| 1st Author's Name | Tomoaki Morita |
| 1st Author's Affiliation | Tokyo University of Science(Tokyo Univ. of Science) |
| 2nd Author's Name | Ryo Sakai |
| 2nd Author's Affiliation | Tokyo University of Science(Tokyo Univ. of Science) |
| 3rd Author's Name | Yohtaro Umeda |
| 3rd Author's Affiliation | Tokyo University of Science(Tokyo Univ. of Science) |
| 4th Author's Name | Yusuke Kozawa |
| 4th Author's Affiliation | Ibaraki University(Ibaraki Univ.) |
| Date | 2017-10-20 |
| Paper # | EMCJ2017-45,MW2017-97,EST2017-60 |
| Volume (vol) | vol.117 |
| Number (no) | EMCJ-243,MW-244,EST-245 |
| Page | pp.pp.105-110(EMCJ), pp.105-110(MW), pp.105-110(EST), |
| #Pages | 6 |
| Date of Issue | 2017-10-12 (EMCJ, MW, EST) |