DocumentCode :
1783538
Title :
Wideband high power high efficiency linear GaN power amplifier for cognitive radio application
Author :
Demenitroux, W. ; Mandica, L. ; Richardeau, C. ; Gerfault, B. ; Berthou, N. ; Grandgeorge, P.
Author_Institution :
Thales Commun. & Security, Cholet, France
fYear :
2014
fDate :
6-7 Oct. 2014
Firstpage :
620
Lastpage :
623
Abstract :
This paper describes a linear, high efficient, high power push-pull GaN amplifier in the VHF-UHF band. This PA shows an efficiency of 60-55% from 10 MHz to 650 MHz, for an output power of 100W and a compressed gain of 19,5 +/-1.5 dB. By reducing the drain voltage to 30V, the efficiency is 70-60 with an output power of 47 dBm and a power gain of 18,5 +/-1.5 dB. Moreover, the measured EVM is less than 2% for an efficiency about 40% and an output power from 0 dBm to 45 dBm using a 64-QAM modulation at 50V. Nevertheless, the record efficiency of 60% have been measured on a 3pi/8 PSK (EDGE) digital modulation with an EVM <; 2.5%, for a tunable output power from 42 to 48 dBm.
Keywords :
III-V semiconductors; UHF power amplifiers; VHF amplifiers; cognitive radio; differential amplifiers; gallium compounds; phase shift keying; quadrature amplitude modulation; wide band gap semiconductors; 3pi-8 PSK digital modulation; 64-QAM modulation; EDGE; EVM; GaN; VHF-UHF band; cognitive radio application; compressed gain; drain voltage reduction; efficiency 60 percent to 55 percent; frequency 10 MHz to 650 MHz; in-band linearity; power 100 W; power gain; power push pull amplifier; record efficiency; tunable output power; voltage 30 V; voltage 50 V; wideband high power high efficiency linear power amplifier; Bandwidth; Gallium nitride; Linearity; Microwave amplifiers; Modulation; Power amplifiers; Power generation; ACPR; Cognitive Radio; EVM; GaN; Power amplifier; linearity; push-pull;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
European Microwave Integrated Circuit Conference (EuMIC), 2014 9th
Conference_Location :
Rome
Type :
conf
DOI :
10.1109/EuMIC.2014.6997933
Filename :
6997933
Link To Document :
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