Title :
High-efficiency X band GaN power amplifier for small satellite downlink system
Author :
Watanabe, Hiromi ; Ceylan, Oguzhan ; Saito, Hiroshi ; Tomiki, Atsushi ; Nunomura, Hitoshi ; Shigeta, Osamu ; Iwakire, Naohiko ; Shinke, Takahiro ; Fukami, Tadashi
Author_Institution :
Dept. of Electr. Eng. & Inf. Syst., Univ. of Tokyo, Tokyo, Japan
Abstract :
A high-speed downlink communication system is required to meet various applications for small satellites. The purpose of this research is to develop a high-data-rate (typically over 300Mbps) communication system. Generally, the operation at nonlinear region provides high efficiency for a RF power amplifier. However the amplitude-phase modulated signal, which is an efficient scheme in term of frequency band, requires high linearity. In order to amplify amplitude-phase modulated signal for high data rate, a 2W X Band GaN-HEMT power amplifier and digital pre-distortion technique were developed. In this paper measurements and simulations of the system are presented.
Keywords :
power amplifiers; satellite links; RF power amplifier; amplify amplitude phase modulated signal; digital predistortion technique; frequency band; high data rate communication system; high efficiency X band power amplifier; high speed downlink communication system; power 2 W; satellite downlink system; Bit rate; Downlink; Gallium nitride; Power amplifiers; Satellites; Space vehicles; Transmitters; GaN-HEMT PA; X band; digital pre-distortion; downlink; small satellite;
Conference_Titel :
Microwave Symposium Digest (IMS), 2013 IEEE MTT-S International
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4673-6177-4
DOI :
10.1109/MWSYM.2013.6697795
