Paper Abstract and Keywords |
Presentation |
2010-01-15 10:55
A Low-Voltage, Broadband Operation HBT Power Amplifier for CDMA Applications Kazuya Yamamoto, Atsushi Okamura, Takayuki Matsuzuka, Yutaka Yoshii, Satoshi Suzuki, Masatoshi Nakayama, Teruyuki Shimura, Naohito Yoshida (Mitsubishi Electric Corp.) ED2009-193 MW2009-176 Link to ES Tech. Rep. Archives: ED2009-193 MW2009-176 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
This paper describes circuit design and measurement results of an HBT MMIC power amplifier module (PA) operating with a 2.5-V low reference (Vref) and 2.8-V low collector supply voltages (Vcc). While covering 824-925-MHz broadband CDMA operation at 2.8-V Vcc, the PA allows a 1.1-V low Vcc and 18-dBm Pout operation. This is realized by an on-chip step quiescent current selector monitoring collector voltage. Measurement results under the 2.8/1.1-V Vcc and 2.5-V Vref bias conditions show that the PA meets J-/W-CDMA power and distortion specifications sufficiently over a wide temperature range from –20 to 85°C while operating over a wideband from 824 to 925 MHz. For J-CDMA (IS-95B) modulation, the PA can deliver a 28-dBm Pout, a 36% PAE, and a –50-dBc ACPR, while a 29-dBm Pout, a 38% PAE, and a –40-dBc ACLR are achieved for W-CDMA (R99) modulation. In addition, the PA is capable of delivering a 18-dBm Pout and more than 23% PAE under 824-925-MHz and 1.1-V J-CDMA modulation test conditions. To the best of author’s knowledge, this is the first report on a broadband CDMA PA operating with low Vref and low Vcc. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Power Amplifiers / HBT / MMIC / CDMA / Low-voltage / Broadband / / |
Reference Info. |
IEICE Tech. Rep., vol. 109, no. 360, ED2009-193, pp. 105-110, Jan. 2010. |
Paper # |
ED2009-193 |
Date of Issue |
2010-01-06 (ED, 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) |
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ED2009-193 MW2009-176 Link to ES Tech. Rep. Archives: ED2009-193 MW2009-176 |
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