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| Presentation | 2017-10-20 10:25 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 (Tokyo Univ. of Science), Yusuke Kozawa (Ibaraki Univ.)  EMCJ2017-45 MW2017-97 EST2017-60 Link to ES Tech. Rep. Archives: MW2017-97 EST2017-60 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (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) |
| (in English) | transmitter / power amplifier / class-D / envelope pulse-width modulation / quadrature modulation / power-added efficiency / zero current switching / 90° hybrid | |
| Reference Info. | IEICE Tech. Rep., vol. 117, no. 244, MW2017-97, pp. 105-110, Oct. 2017. | |
| Paper # | MW2017-97 | |
| Date of Issue | 2017-10-12 (EMCJ, MW, EST) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | EMCJ2017-45 MW2017-97 EST2017-60 Link to ES Tech. Rep. Archives: MW2017-97 EST2017-60 |
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| Conference Information | |
| Committee | MW EMCJ EST |
| Conference Date | 2017-10-19 - 2017-10-20 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Yupopo |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Electromagnetic simulation ，EMC, Microwave technologies |
| Paper Information | |
| Registration To | MW |
| Conference Code | 2017-10-MW-EMCJ-EST-EMC |
| Language | Japanese |
| 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.) |
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| Speaker | Author-1 |
| Date Time | 2017-10-20 10:25:00 |
| Presentation Time | 20 minutes |
| Registration for | MW |
| Paper # | EMCJ2017-45, MW2017-97, EST2017-60 |
| Volume (vol) | vol.117 |
| Number (no) | no.243(EMCJ), no.244(MW), no.245(EST) |
| Page | pp.105-110 |
| #Pages | 6 |
| Date of Issue | 2017-10-12 (EMCJ, MW, EST) |
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