Paper Abstract and Keywords |
Presentation |
2014-03-05 15:25
Modulation Accuracy of a Polar-modulation EPWM Transmitter with a NMOS-type Class-D Power Amplifier Yoshiharu Iikura, Yohtaro Umeda, Yusuke Kozawa (Tokyo Univ. of Science) MW2013-221 Link to ES Tech. Rep. Archives: MW2013-221 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
Switching-mode power amplifiers for wireless communication systems demand high power efficiency and linearity. Of the available types of high-efficiency switching-mode power amplifiers, envelope pulse-width modulation (EPWM) transmitters are advantageous because of their high power efficiency and linearity. A polar-modulation EPWM transmitter with a class-E power amplifier has high power efficiency but exhibits degraded error vector magnitude (EVM) performance if a lumped-element inductor is used for blocking signals in the power-supply line. This degradation is caused by phase distortion due to parasitic capacitance change of a transistor. This change is caused by a transient response biase in the transistor of the amplifier that occur when a burst RF signal is received. Through simulation, this paper demonstrates that the EVM performance of a class-D power amplifier is superior to that of a class-E power amplifier. In addition, the output power, drain efficiency, and power-added efficiency of the two power amplifier classes are compared. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
transmitter / power amplifier / class E / class D / envelope pulse-width modulation / EPWM / error vector magnitude / power-added efficiency |
Reference Info. |
IEICE Tech. Rep., vol. 113, no. 460, MW2013-221, pp. 139-144, March 2014. |
Paper # |
MW2013-221 |
Date of Issue |
2014-02-25 (MW) |
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 |
MW2013-221 Link to ES Tech. Rep. Archives: MW2013-221 |
Conference Information |
Committee |
MW |
Conference Date |
2014-03-04 - 2014-03-05 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Ehime University |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
Microwave Technologies |
Paper Information |
Registration To |
MW |
Conference Code |
2014-03-MW |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Modulation Accuracy of a Polar-modulation EPWM Transmitter with a NMOS-type Class-D Power Amplifier |
Sub Title (in English) |
|
Keyword(1) |
transmitter |
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power amplifier |
Keyword(3) |
class E |
Keyword(4) |
class D |
Keyword(5) |
envelope pulse-width modulation |
Keyword(6) |
EPWM |
Keyword(7) |
error vector magnitude |
Keyword(8) |
power-added efficiency |
1st Author's Name |
Yoshiharu Iikura |
1st Author's Affiliation |
Tokyo University of Science (Tokyo Univ. of Science) |
2nd Author's Name |
Yohtaro Umeda |
2nd Author's Affiliation |
Tokyo University of Science (Tokyo Univ. of Science) |
3rd Author's Name |
Yusuke Kozawa |
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Tokyo University of Science (Tokyo Univ. of Science) |
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Speaker |
Author-1 |
Date Time |
2014-03-05 15:25:00 |
Presentation Time |
25 minutes |
Registration for |
MW |
Paper # |
MW2013-221 |
Volume (vol) |
vol.113 |
Number (no) |
no.460 |
Page |
pp.139-144 |
#Pages |
6 |
Date of Issue |
2014-02-25 (MW) |