A flat gain/power responses 618 GHz power amplifier MMIC with high PAE by using transformer networks
✍ Scribed by Shu-Jenn Yu; Wei-Chou Hsu; Ching-Sung Lee; Chian-Sern Chang; Chang-Luen Wu; Ching-Hsueh Chang
- Publisher
- John Wiley and Sons
- Year
- 2007
- Tongue
- English
- Weight
- 285 KB
- Volume
- 50
- Category
- Article
- ISSN
- 0895-2477
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✦ Synopsis
Abstract
A two‐stage power amplifier monolithic microwave integrated‐circuit, operating between 6 and 18 GHz by implementing AlGaAs/InGaAs/GaAs pseudomorphic high electron mobility transistors is presented. This devised power amplifier has demonstrated flat gain and power responses over a wide bandwidth by employing a novel design approach of combined prematched LC network and multisection impedance transformer network. Superior gain flatness of ±1.5 dB and power flatness of ±1.1 dBm over 6–18 GHz bandwidth, respectively, have been successfully achieved. With a dual‐bias configuration, the power amplifier shows average small‐signal gain of 13 dB, 2‐dB gain compression power of 32.4 dBm and high power‐added efficiency (PAE) of 24–34.5%. In additions, by using off‐chip combiner techniques, the balanced power amplifier shows superior maximum output power of 36.5 dBm and PAE of 22–33.1%. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 205–208, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23033