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


Watanabe H., Ceylan O., Saito H., Tomiki A., Nunomura H., Shigeta O., ...Daha Fazla

IEEE MTT-S International Microwave Symposium Digest (IMS), Washington, Amerika Birleşik Devletleri, 2 - 07 Haziran 2013 identifier

  • Basıldığı Şehir: Washington
  • Basıldığı Ülke: Amerika Birleşik Devletleri

Özet

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.