混合算法分析卫星星体对导航天线辐射特性的影响

Analysis of Influence of Satellite on Radiation Characteristics of Navigation Antenna by Hybrid Algorithm

摘要:

为了测试卫星星体对星载导航天线辐射特性的影响,对太阳翼展开状态下的导航天线进行了数值研究,提出了一种基于矩量法MOM及物理光学法PO的混合算法,将研究目标划分为MOM区及PO区,并进行网格剖分,计算出卫星星体对导航天线影响后的辐射特性,计算结果表明,卫星星体与星载导航天线之间的耦合作用会降低天线主瓣内的辐射增益;同时,考虑到卫星星体的电大尺寸,以金属平台附近的线天线为例,采用矩量法MOM及仿真软件FEKO验证了混合算法MOM-PO的正确性。

Abstract:

To test the influence of satellite astral on the radiation characteristics of onboard navigation antenna, the antenna in the condition that the solar wings are spreading is studied numerically, and the hybrid algorithm MOM-PO which is based on method of moment MOM and physical optics PO is proposed to divide the research objectives into MOM zones and PO zones which are meshed. The influence of satellite astral on radiation characteristics of the navigation antenna is calculated, the results show that the coupling of stars and navigation antennas will reduce the radiation gain inside main lobe. Taking into account the size of the satellite, wire antenna nearby the metal platform is calculated to verify the hybrid algorithm MOM-PO by MOM and software FEKO.