@inproceedings{d2d0d9a283f3458690472aa168e0dab9,
title = "A tunable matching network for power amplifier efficiency enhancement and distortion reduction",
abstract = "Variable load technique has been proposed as a solution for improving the efficiency of power amplifiers at reduced drive levels. To provide variable load impedance to a transistor, various configurations for tunable matching networks may be used. However, many of them can introduce large AM-PM distortion. To avoid the degradation in linearity, a T-network that in principle causes no phase variation is presented in this work. A 1750-MHz medium power amplifier along with a tunable matching network using GaAs hyperabrupt varactor diodes is designed, fabricated, and tested. Experimental results for the power amplifier show that the power-added efficiency (PAE) at reduced power levels is enhanced when variable load is used. Meanwhile, lower AM-AM and AM-PM distortions are observed, demonstrating its potential for improving the efficiency as well as the linearity.",
keywords = "AM-PM conversion, Distortion, Efficiency, Power amplifiers, Tunable circuits and devices",
author = "Fu, {Jia Shiang} and Amir Mortazawi",
year = "2008",
doi = "10.1109/MWSYM.2008.4633261",
language = "???core.languages.en_GB???",
isbn = "9781424417810",
series = "IEEE MTT-S International Microwave Symposium Digest",
pages = "1151--1154",
booktitle = "2008 IEEE MTT-S International Microwave Symposium Digest, MTT",
note = "2008 IEEE MTT-S International Microwave Symposium Digest, MTT ; Conference date: 15-06-2008 Through 20-06-2008",
}