A simple method to cut down configuration of feedforward power amplifier

Author

Xiaowei Zhu ; Jianyi Zhou ; Wei Hong ; Hongxin Zhao

Author_Institution

Lab. of Millimeter Waves, Southeast Univ., Nanjing, China

Volume

2

fYear

2000

fDate

11-16 June 2000

Firstpage

791

Abstract

This paper describes a low cost and simple design method for feedforward linear power amplifier. The adaptive control techniques are employed in loop I to cancel carrier and extract error signal. In the loop II, the lookup table method of temperature correction is utilized for ensuring third-order intermodulation products (IMD/sub 3/) cancellation. The achievement has been realized in 460 MHz multicarrier power amplifier and CDMA base station power amplifier. The two-tone (IMD/sub 3/) are less than 62 dBc and the operation bandwidth is more than 20 MHz at 460 MHz. The ACPR of CDMA power amplifier is better than 40 dBc.

Keywords

UHF power amplifiers; adaptive control; code division multiple access; digital communication; feedforward; intermodulation; table lookup; 20 MHz; 460 MHz; ACPR; CDMA base station power amplifier; adaptive control techniques; design method; error signal; feedforward power amplifier; linear power amplifier; lookup table method; multicarrier power amplifier; operation bandwidth; temperature correction; third-order intermodulation products; Adaptive control; Bandwidth; Base stations; Costs; Design methodology; Error correction; Multiaccess communication; Power amplifiers; Table lookup; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest. 2000 IEEE MTT-S International

Conference_Location

Boston, MA, USA

ISSN

0149-645X

Print_ISBN

0-7803-5687-X

Type

conf

DOI

10.1109/MWSYM.2000.863300

Filename

863300