Title :
Linear power amplifier with a modified predistortion compensation for NCDMA applications
Author :
Kao, Yao-Huang ; Chen, Wei-Chung
Author_Institution :
Inst. of Commun. Eng., Nat. Chiao-Tung Univ., Hsin-Chu, Taiwan
Abstract :
The selection of the matched transistor pair in a cascaded architecture for predistortion compensation is nontrivial. In this study, a modified architecture of predistortion with two paths is presented for the high power amplifier. The goal is to develop a 10W linear power amplifier with LDMOS transistor for 8 channels NCDMA repeater from 870 to 880MHz. With the modified scheme, the improvement of intermodulation is larger than 10dB and spurious is less than 50dBc.
Keywords :
UHF power amplifiers; code division multiple access; compensation; intermodulation distortion; power MOSFET; repeaters; 10 W; 870 to 880 MHz; LDMOS transistor; NCDMA applications; high power amplifier; linear power amplifier; matched transistor pair; modified predistortion compensation; Bandwidth; Costs; Driver circuits; High power amplifiers; Nonlinear distortion; Power amplifiers; Power engineering and energy; Predistortion; Repeaters; Testing; LDMOS; Linear Power Amplifier; NCDMA; Predistortion;
Conference_Titel :
Microwave Conference Proceedings, 2005. APMC 2005. Asia-Pacific Conference Proceedings
Print_ISBN :
0-7803-9433-X
DOI :
10.1109/APMC.2005.1606221
