Title :
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
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;
Conference_Titel :
Gallium Arsenide and Other Semiconductor Application Symposium, 2005. EGAAS 2005. European
Conference_Location :
Paris
Print_ISBN :
88-902012-0-7
