A highly efficient chireix amplifier using adaptive power combining

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...

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Bibliographic Details
Main Authors: Qureshi, J., Liu, R., de Graauw, A.J.M., van der Heijden, M.P., Gajadharsing, J., de Vreede, L.C.N.
Format: Conference Proceeding
Language:English
Subjects:
adaptive matching
Chireix
high efficiency
LINC
Loading
out-phasing
Power amplifier
Power amplifiers
Power combiners
Power generation
Transistors
Transmitters
varactor
Varactors
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Summary: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.
ISSN:0149-645X
2576-7216
DOI:10.1109/MWSYM.2008.4632943