A design of K-band predistortion linearizer using reflective Schottky diode for satellite TWTAs

Author

Jeong, Hee-Young ; Park, Sang-Keun ; Ryu, Nam-Sik ; Jeong, Yong-Chae ; Yom, In-Bok ; Kim, Young

Author_Institution

Dept. of Inf. & Commun. Eng., Chonbuk Nat. Univ., Chonju, South Korea

fYear

2005

fDate

3-4 Oct. 2005

Firstpage

597

Lastpage

600

Abstract

In this paper, a new predistortion method to reduce nonlinearity of a traveling wave tube amplifiers (TWTAs) is proposed. Nonlinear transfer characteristics of TWTA are analyzed using a carrier complex power series (CCPS). An inverse complex power series of a predistortion linearizer to linearize TWTA are also proposed. The inverse nonlinear distortion characteristics of predistorter can be realized with reflective structure that is composed of Schottky diode and resistor-terminated transmission line. The AM-to-AM and the AM-to-PM characteristics of TWTA on K-band were improved from -5.8 dB and -37.3/spl deg/ to 0.8 dB and 6.7/spl deg/ by proposed predistortion linearizer, respectively.

Keywords

Schottky diodes; linearisation techniques; satellite communication; travelling wave amplifiers; K-band predistortion linearizer; carrier complex power series; inverse nonlinear distortion characteristics; reflective Schottky diode; resistor-terminated transmission line; satellite TWTA; traveling wave tube amplifiers; Circuits; Isolators; K-band; Nonlinear distortion; Phase distortion; Predistortion; Satellites; Schottky diodes; Signal generators; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Gallium Arsenide and Other Semiconductor Application Symposium, 2005. EGAAS 2005. European

Conference_Location

Paris

Print_ISBN

88-902012-0-7

Type

conf

Filename

1637289