DocumentCode
2942024
Title
A highly efficient chireix amplifier using adaptive power combining
Author
Qureshi, J. ; Liu, R. ; de Graauw, A.J.M. ; van der Heijden, M.P. ; Gajadharsing, J. ; de Vreede, L.C.N.
Author_Institution
DIMES, Delft University of Technology, Feldmannweg 17, 2628 CT, The Netherlands
fYear
2008
fDate
15-20 June 2008
Firstpage
759
Lastpage
762
Abstract
A novel, highly efficient out-phasing amplifier with adaptive power combiner is presented. Saturated class-F operation is used for the amplifier cells. Varactor tuning is applied to make the output power combining network adaptive. Use of optimum input drive conditions and output varactor tuning, to eliminate imaginary loading introduced by the out-phasing principle, yields an amplifier efficiency of more than 50% over a 9 dB power back-off range.
Keywords
circuit tuning; power amplifiers; varactors; adaptive power combining; highly efficient chireix amplifier; out-phasing amplifier; output varactor tuning; power amplifiers; varactor tuning; Amplitude modulation; Circuits; High power amplifiers; Operational amplifiers; Power amplifiers; Power combiners; Power generation; Transmitters; Varactors; Voltage; Chireix; LINC; Power amplifier; adaptive matching; high efficiency; out-phasing; varactor;
fLanguage
English
Publisher
ieee
Conference_Titel
Microwave Symposium Digest, 2008 IEEE MTT-S International
Conference_Location
Atlanta, GA
ISSN
0149-645X
Print_ISBN
978-1-4244-1780-3
Electronic_ISBN
0149-645X
Type
conf
DOI
10.1109/MWSYM.2008.4632943
Filename
4632943
Link To Document