DocumentCode
1329536
Title
Broadband radial waveguide power amplifier using a spatial power combining technique
Author
Song, Kaijun ; Fan, Y. ; Zhou, Xiaoxin
Author_Institution
EHF Key Lab. of Fundamental Sci., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Volume
3
Issue
8
fYear
2009
fDate
12/1/2009 12:00:00 AM
Firstpage
1179
Lastpage
1185
Abstract
A broadband radial waveguide power amplifier has been designed and fabricated using a spatial power dividing/combining technique. A simple electromagnetic model of this power-dividing/combining structure has been developed. Analysis based on equivalent circuits gives the design formula for perfect power-dividing/combining circuits. The measured small-signal gain of the eight-device power amplifier is 12-16.5 dB over a broadband from 7 to 15 GHz. The measured maximum output power at 1-dB compression is 28.6 dBm at 10 GHz, with a power-combining efficiency of about 91-. Furthermore, the performance degradation of this power amplifier because of device failures has also been measured.
Keywords
equivalent circuits; microwave power amplifiers; power combiners; power dividers; broadband radial waveguide power amplifier; electromagnetic model; equivalent circuits; frequency 7 GHz to 15 GHz; gain 12 dB to 16.5 dB; small-signal gain; spatial power combining; spatial power dividing;
fLanguage
English
Journal_Title
Microwaves, Antennas & Propagation, IET
Publisher
iet
ISSN
1751-8725
Type
jour
DOI
10.1049/iet-map.2008.0299
Filename
5331955
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