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 -5.8dB and -37.3° to 0.8dB and 6.7° by proposed predistortion linearizer, respectively.
Keywords :
Schottky diodes; linearisation techniques; microwave diodes; travelling wave amplifiers; carrier complex power series; predistortion linearizer; reflective Schottky diode; resistor-terminated transmission line; satellite traveling wave tube amplifiers; Circuits; Isolators; K-band; Nonlinear distortion; Phase distortion; Predistortion; Satellites; Schottky diodes; Signal generators; Voltage;
Conference_Titel :
Microwave Conference, 2005 European
Print_ISBN :
2-9600551-2-8
DOI :
10.1109/EUMC.2005.1610246
