A High Power Asymmetric Doherty Amplifier with Improved Linear Dynamic Range

An asymmetric high power extended Doherty amplifier, which has the extended peak efficiency over a 9-dB of output power and a linear dynamic range is presented in this paper. The power amplifier is designed by using two different LDMOS FET's for W-CDMA base station applications. To realize the...

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Bibliographic Details
Published in2006 IEEE MTT-S International Microwave Symposium Digest pp. 1348 - 1351
Main Authors Ju-Young Lee, Ji-Yeon Kim, Jong-Heon Kim, Kyoung-Joon Cho, Stapleton, S.P.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.06.2006
Subjects
Asymmetric Doherty
Dynamic range
Efficiency extension
FETs
High power amplifiers
Impedance
linear dynamic range
Multiaccess communication
Peak to average power ratio
Power amplifier
Power amplifiers
Power dividers
Power engineering and energy
Power generation
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Summary:An asymmetric high power extended Doherty amplifier, which has the extended peak efficiency over a 9-dB of output power and a linear dynamic range is presented in this paper. The power amplifier is designed by using two different LDMOS FET's for W-CDMA base station applications. To realize the peak efficiency extension and a linear dynamic range, a two times larger peaking device compared to the main device, and an unequal power divider is used. This asymmetric Doherty amplifier obtained a measured P1dB of 49.8 dBm. An efficiency of 31.1 % and an ACLR of -35 dBc are achieved at 9 dB back-off point, respectively
ISBN:9780780395411
0780395417
ISSN:0149-645X
2576-7216
DOI:10.1109/MWSYM.2006.249499