High-Efficiency X Band GaN Power Amplifier for Small Satellite Downlink System

Watanabe H., Ceylan O., Saito H., Tomiki A., Nunomura H., Shigeta O., ...More

IEEE MTT-S International Microwave Symposium Digest (IMS), Washington, United States Of America, 2 - 07 June 2013 identifier

  • Publication Type: Conference Paper / Full Text
  • City: Washington
  • Country: United States Of America


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.