Third-order Intermodulation Reduction in Mobile Power Amplifiers by the First Stage Bias Control
Loading...
Date
2012-06
Authors
ORCID
Advisor
Referee
Mark
Journal Title
Journal ISSN
Volume Title
Publisher
Společnost pro radioelektronické inženýrství
Abstract
In this paper, the third order intermodulation distortion (IMD3) of three-stage power amplifier (PA) is analyzed using the Volterra series. The analysis explains how the total IMD3 of the three-stage power amplifier can be reduced by the first-stage bias condition. The three-stage PA, which is fabricated using InGaP/GaAs hetero-junction bipolar transistor (HBT), operates with an optimized first driver stage bias for higher P1dB and good gain flatness. The power amplifier has been designed for 1626.5 MHz~1660.5 MHz satellite mobile communications. With π/4 DQPSK modulation signals, this PA can deliver a highly linear output power of 33 dBm from 3.6V supply voltage. At 33 dBm output power, it shows a gain of 31.9 dB, a power-added efficiency (PAE) of 39.8%, an adjacent channel power ratio (ACPR) of -28.2 dBc at a 31.25 KHz offset frequency.
Description
Citation
Radioengineering. 2012, vol. 21, č. 2, s. 746-751. ISSN 1210-2512
http://www.radioeng.cz/fulltexts/2012/12_02_0746_0751.pdf
http://www.radioeng.cz/fulltexts/2012/12_02_0746_0751.pdf
Document type
Peer-reviewed
Document version
Published version
Date of access to the full text
Language of document
en