Title :
Nonlinearity compensation of linear power amplifier for mobile communication
Author :
Oosaki, Kuninori ; Akaiwa, Yoshihiko
Author_Institution :
Dept. of Electr. Eng., Kurume Nat. Coll. of Technol., Japan
Abstract :
We examines nonlinearity compensation with a 836.5 MHz high efficiency power amplifier. We use the high frequency negative feedback method, which is robust against changes in the amplifier characteristics and whose circuit implementation is easy. The maximum feedback gain of the amplifier is 9 dB. Thus, in the unsaturated region, the distortion is reduced by 9 dB. In the saturated region, an improvement is not obtained due to the reduction of the feedback gain. Computer simulation of the saturated region shows that the feedback amplifier provides a distortion improvement of 10 dB if a feedback gain of 20 dB is achieved. Computer aided design of a feedback amplifier shows an encouraging result for achieving a feedback gain of 20 dB
Keywords :
UHF power amplifiers; circuit CAD; circuit analysis computing; feedback amplifiers; land mobile radio; linear network synthesis; 20 dB; 836.5 MHz; 9 dB; amplifier characteristics; computer aided design; computer simulation; distortion; high efficiency power amplifier; high frequency negative feedback method; linear power amplifier; maximum feedback gain; mobile communication; nonlinearity compensation; saturated region; unsaturated region; Feedback amplifiers; Feedback circuits; Feedback loop; Frequency; High power amplifiers; Mobile communication; Negative feedback; Power amplifiers; Radiofrequency amplifiers; Voltage;
Conference_Titel :
Universal Personal Communications. 1995. Record., 1995 Fourth IEEE International Conference on
Conference_Location :
Tokyo
Print_ISBN :
0-7803-2955-4
DOI :
10.1109/ICUPC.1995.496909
