A lumped-element analog predistorter for VHF application

Author

Fang, Xiaohu ; Wu, Guoan ; Zhai, Yu ; Lu, Yanhui ; Xue, Yi ; Li, Wenguang

Author_Institution

Dept. of Electron. Sci. & Technol., HuaZhong Univ. of Sci. & Technol., Wuhan, China

Volume

1

fYear

2010

fDate

17-20 Sept. 2010

Firstpage

1

Lastpage

4

Abstract

An analog predistorter (APD) for VHF application is presented. The proposed predistorter is fully composed of lumped elements. It has a moderate memory compensation capability by using a lowpass filter, and also includes a compact IM3 generator which is capable of canceling the fundamental components. For verification, the proposed predistorter is implemented and applied to a RF power amplifier for 57.463.6MHz application with an average output power of 37dBm, the test results show that IMD3 of power amplifier improves more than 25dB for CW two-tone signal with a tone spacing of 1MHz, and significant improvement of IMD3 is obtained for two-tone signals with tone spacing varying from 5KHz to 3MHz.

Keywords

VHF amplifiers; analogue circuits; compensation; distortion; low-pass filters; power amplifiers; CW two-tone signal; RF power amplifier; VHF application; compact IM3 generator; frequency 57.4 MHz to 63.6 MHz; low-pass filter; lumped-element analog predistorter; memory compensation capability; Delay; Filtering theory; Generators; Microwave filters; Power generation; Predistortion;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals Systems and Electronics (ISSSE), 2010 International Symposium on

Conference_Location

Nanjing

Print_ISBN

978-1-4244-6352-7

Type

conf

DOI

10.1109/ISSSE.2010.5607115

Filename

5607115