应用于北斗卫星导航的频率选择表面研究与设计

Study and Design of Frequency Selective Surface Applied to Beidou Satellite Navigation

为提升北斗导航信息频段兼容性,设计了一款基于频率选择表面(FSS)的天线罩。利用CST电磁仿真软件,以典型导航天线为例,仿真分析了FSS天线罩对导航天线性能的影响。仿真结果表明,所设计的FSS天线罩对天线轴比、S11、增益等参数影响较小。在此基础之上,进一步仿真分析了FSS天线罩加载前后,在2.405GHz平面波辐照下,天线端口接收波形的变化。仿真结果表明加载FSS天线罩能够有效抑制干扰信号,提升导航天线在复杂电磁环境中的电磁兼容性。

In order to improve the compatibility of Beidou navigation information frequency band,a radome based on frequency selective surface(FSS)is designed.Using CST electromagnetic simulation software,the influence of FSS radome on the performance of navigation antenna is simulated and analyzed by taking a typical navigation antenna as an example.The simulation results show that the designed FSS radome has little influence on the axial ratio,S11 and gain,etc..On this basis,the changes of received electromagnetic wave in antenna port under the radiation of plane wave at 2.405 GHz before and after FSS radome loading are further simulated and analyzed.The simulation results show that loading FSS radome can effectively suppress the interference signals and improve the electromagnetic compatibility of navigation antennas in complex electromagnetic environment.