电讯技术2024，Vol.64Issue(1)：43-50,8.DOI:10.20079/j.issn.1001-893x.220624002
低轨卫星L频段中继通信载荷技术研究
Research on L-band Relay Communication Payload Technology for LEO Satellites
摘要
Abstract
To support the real-time high data rates communications between sea and land-based systems,a highly integrated,low-cost and low-power L-band relay communication payload is designed and implemented for low Earth orbit(LEO)satellites.The relay communication payload integrates the communication antenna,radio frequency(RF)front-end,signal processing unit,power conversion unit and interface unit.The receiving front-end is designed with an active phased array antenna,and the transmitting unit is designed with a GaN power amplifier to improve the G/T value of the receiving unit and the effective isotropic radiated power(EIRP)of the transmitting unit.The signal processing unit integrates a zero intermediate frequency(IF)receiving structure and a direct RF modulation structure to complete the functions of receiving and demodulating 8 Mb/s data in the reverse link and processing and forwarding data in the forward link.The space environment simulation experiments in individual and followed with the satellite situations are done and the simulation tests of the communications link between the satellite and the ground systems are finished.The payload on board enables L-band satellite communications.Its mass is 12.87 kg and power consumption in more than 30 W RF power is 91.2 W(3.04 A/30 V)in-25℃～+55℃conditions.关键词
低轨卫星/L频段中继通信/相控阵天线Key words
LEO satellite/relay communication/phased array antenna分类
信息技术与安全科学引用本文复制引用
刘冕,赵晖,胡一皓,刘才瑞,薛晟,王晋阳,梁显锋..低轨卫星L频段中继通信载荷技术研究[J].电讯技术,2024,64(1):43-50,8.基金项目
中国科学院战略性先导科技专项(A类)(XDA22000000) （A类）
