An intermodulation products generator for predistortion of base station HPAs

Author

Xiao, M.X. ; Cheung, S.W. ; Yuk, T.I.

Author_Institution

Dept. of Electr. & Electron. Eng., Univ. of Hong Kong, Hong Kong

fYear

2009

fDate

18-22 Jan. 2009

Firstpage

602

Lastpage

605

Abstract

This paper presents the design of an intermodulation (IM) products generator for predistortion of high-power amplifiers (HPAs) used in the base stations of cellular mobile systems. The IM products generator composes of two simple mixers constructed with Schottky diodes, has a simple structure and requires no external dc bias voltage. Simulation and measurement results show that the generator has a low conversion loss and low spurious frequency components. Studies of the IM3 generator for predistortion of a practical base station HPA are also carried out by simulation and measurements. Measurement result of a two-tone test shows that the predistorter can suppress the 3^rd intermodulation distortion (IMD) products by 15 dB.

Keywords

Schottky diode mixers; cellular radio; intermodulation distortion; power amplifiers; HPA; IM3 generator; Schottky diodes; base station; cellular mobile systems; high-power amplifiers; intermodulation distortion; intermodulation products generator; mixers; predistortion; two-tone test; Base stations; DC generators; Distortion measurement; Frequency measurement; High power amplifiers; Loss measurement; Mixers; Predistortion; Schottky diodes; Voltage measurement; High Power Amplifier; Intermodulation distortion; Intermodulation products generator; Mixer; RF Analog Predistortion;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio and Wireless Symposium, 2009. RWS '09. IEEE

Conference_Location

San Diego, CA

Print_ISBN

978-1-4244-2698-0

Electronic_ISBN

978-1-4244-2699-7

Type

conf

DOI

10.1109/RWS.2009.4957423

Filename

4957423