舱外航天服天线设计及仿真验证

Design and Simulation Verification of Antenna for EVA Spacesuit

为提高未来新型舱外航天服天线的性能,解决将天线层与服装热防护层共形和使馈电网络适应舱外环境温度的问题,提出采用织物振子天线形式作为舱外航天服天线整体方案,从天线层结构和馈电网络两方面对舱外航天服天线进行结构设计。根据舱外航天服天线安装位置,建立了相应的仿真模型,采用天线辐射体、热防护层及服装整体一体化电磁仿真技术,对其增益覆盖性进行分析。仿真结果表明:背包方案的舱外航天服天线全向性和增益覆盖性性能较好,增益在-12 dBi时收发天线的覆盖性可以达到90%以上。

To improve the performance of antenna in the new generation EVA spacesuit of China,to solve the technical problems of integrating the antenna radiator with the EVA spacesuit,and to enable the adaptation of the feed network to the ambient temperature in space,a fabric dipole antenna was proposed as the overall scheme for the EVA spacesuit antenna.The structure design of EVA spacesuit antenna was conducted from the aspects of antenna layer and feed network.According to the installation position of EVA spacesuit antenna,the corresponding simulation model was established.The gain coverage of the antenna was analyzed with integrated electromagnetic simulation technology covering antenna radiator,thermal shield and EVA spacesuit.The simulation results showed that the performance of the backpack antenna of EVA spacesuit was better than the other schemes.The transceiver antenna coverage could reach more than 90%when the gain was-12 dBi.