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| Presentation | 2011-07-22 11:45 Fundamental Study on Drain Efficiency of EPWM Transmitter using Class-E_M Power Amplifier Naoki Oyama (Fukuoka Univ.), Hiroo Sekiya (Chiba Univ.), Tadashi Suetsugu, Makoto Taromaru (Fukuoka Univ.)  RCS2011-101 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Drain efficiency of EPWM (envelope pulse width modulation) transmitter composed of a class-E_M amplifier is evaluated by circuit simulation, and the pulse modulation method to the constant envelope RF signal by PWM pulses is studied. The E_M amplifier, which is composed of a class-E amplifier and a auxiliary circuit reducing its switching loss during turn-off, is designed normally for continuous wave. Each transistor is modeled with an ideal switch and an on-resistor, where the drain-source capacitance is modeled as a linear one together with the shunt capacitor. Simulation results show that the conventional PWM switching method gating the input RF signal produces unnecessary transient responses making the drain voltage rise and the output signal distorted; the efficiency is degraded. Another method that gates the DC supply voltage by the PWM pulses works as expected and intended, and the result shows the drain efficiency as high as that of an E_M amplifier in case of CW signal. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | drain efficiency / EPWM / class-E amplifier / EER / PWM / delta-sigma modulation / / | |
| Reference Info. | IEICE Tech. Rep., vol. 111, no. 145, RCS2011-101, pp. 157-162, July 2011. | |
| Paper # | RCS2011-101 | |
| Date of Issue | 2011-07-14 (RCS) | |
| 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 | RCS2011-101 |
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| Conference Information | |
| Committee | RCS NS |
| Conference Date | 2011-07-21 - 2011-07-22 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Asahikawa Civic Culture Hall |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Fixed/Wireless Network, Hand Over, Relay, Distributed MIMO, Mobile Ad-hoc Network, etc. |
| Paper Information | |
| Registration To | RCS |
| Conference Code | 2011-07-RCS-NS |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Fundamental Study on Drain Efficiency of EPWM Transmitter using Class-E_M Power Amplifier |
| Sub Title (in English) | |
| Keyword(1) | drain efficiency |
| Keyword(2) | EPWM |
| Keyword(3) | class-E amplifier |
| Keyword(4) | EER |
| Keyword(5) | PWM |
| Keyword(6) | delta-sigma modulation |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Naoki Oyama |
| 1st Author's Affiliation | Fukuoka University (Fukuoka Univ.) |
| 2nd Author's Name | Hiroo Sekiya |
| 2nd Author's Affiliation | Chiba University (Chiba Univ.) |
| 3rd Author's Name | Tadashi Suetsugu |
| 3rd Author's Affiliation | Fukuoka University (Fukuoka Univ.) |
| 4th Author's Name | Makoto Taromaru |
| 4th Author's Affiliation | Fukuoka University (Fukuoka Univ.) |
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| Speaker | Author-4 |
| Date Time | 2011-07-22 11:45:00 |
| Presentation Time | 20 minutes |
| Registration for | RCS |
| Paper # | RCS2011-101 |
| Volume (vol) | vol.111 |
| Number (no) | no.145 |
| Page | pp.157-162 |
| #Pages | 6 |
| Date of Issue | 2011-07-14 (RCS) |
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