Title :
A High Efficiency Power Amplifier System for CDMA
Author :
Hang, Cynthia Y. ; Wang, Yuanxun ; Itoh, Tatsuo
Author_Institution :
University of California Los Angeles, 405 Hilgard Ave., Los Angeles, CA 90095, cynthiah@ee.ucla.edu
Abstract :
In this paper, the study of a new power combining scheme which has either one or four amplifiers on depending upon the levels of input signal, is extended to a system with its RF carrier modulated by a IS-95 forward link CDMA signal. The performance is compared with the case where either one amplifier or a Wilkinson combined 4-amplfier array is used. The simulated data indicates that this new approach can reach high efficiency while still keeping the good linearity. In the case when the bias current is about 32% of Idss, the power added efficiency (PAE) of the new combining scheme is about 36.9%.
Keywords :
High power amplifiers; Linearity; Multiaccess communication; Peak to average power ratio; Power amplifiers; Power generation; RF signals; Radio frequency; Radiofrequency amplifiers; Switches;
Conference_Titel :
Microwave Conference, 2002. 32nd European
Conference_Location :
Milan, Italy
DOI :
10.1109/EUMA.2002.339395
