A Ka-band analog predistortion linearizer for travelling wave tube amplifiers

Author

Hai-Lin Deng;De-Wei Zhang;Dong-Fang Zhou;Shu-Xing Wang;Jia-Xuan Wang

Author_Institution

Department of Electromagnetic Field and Microwave, Zhengzhou Institute of Information Science and Technology, Zhengzhou 450001 China

Volume

1

fYear

2015

Firstpage

1

Lastpage

3

Abstract

In order to compensate the nonlinear distortion of the traveling wave tube amplifiers (TWTAs), a new analog predistortion linearizer based on vector synthesis technique is presented. This linearizer consists of quadrature hybrids, adjustable analog attenuator based on PIN diodes and nonlinear circuit based on Schottky diodes. The analog predistortion linearizer can realize the expansion of amplitude and phase within the operating frequency (29~31 GHz) and rated input power range and achieve the compensation effect of different amplitudes and phases in reasonably adjusting the bias voltages of PIN and Schottky diodes. The Third Order Intermodulation (TOI) of a Ka-band TWTA was improved about 8.1 dB at -6dB output power back off (OBO) thanks to this proposed predistortion linearizer.

Keywords

"Predistortion","Decision support systems","Conferences","Microwave circuits","Microwave communication","Microwave FET integrated circuits","Microwave integrated circuits"

Publisher

ieee

Conference_Titel

Microwave Conference (APMC), 2015 Asia-Pacific

Print_ISBN

978-1-4799-8765-8

Type

conf

DOI

10.1109/APMC.2015.7411577

Filename

7411577