基于光纤信道的载人航天发射场微波信号转发系统关键问题研究与试验验证

Studies on Microwave Signals over Fiber Forwarding System in Manned Spaceflight Launch Center

航天器微波信号转发系统是载人航天测发系统的重要组成部分,航天器上下行微波信号的转发传输质量直接影响到任务实施。从分析转发系统无线转发模式存在的多径干扰等问题入手,采用光纤传输模式消除多个点位间的空间多径干扰,塔架前端通过天线切换技术以及吸波材料的布设,达到良好的电磁屏蔽效果,大幅度提高了微波信号传输质量,满足了任务需求。

Microwave signals forwarding system, an important manned spaceflight vehicle testing and launching systems, has been developed to achieve microwave data forwarding between the space vehicle and remote testing equipment in manned spaceflight launch center. Based on theoretical analysis and practice, optical fiber link as well as antenna switches and microwave absorption technology were used to avoid the mnhipath interference. The engineering experiment results showed that the EMI environment in the launch tower had been well-established, and that the mission requirement could be satisfied.