天线辐射性能并行测试场研究

Study on Parallel Test Field of Antenna Radiation Performance

常规的解决多天线辐射性能批量测量问题采用的是一个天线测量暗室进行分时段测量或者使用多个暗室进行测量的方法。上述方法存在着测量效率低以及测量试验自动化程度低等问题,同时由于天线电磁解算难以通过解析表达,使得天线量化分析比较困难。为解决上述问题,提出对多发射源以及配套的天线测量机构进行空域组合的试验方案,难点在于如何建立精准的多天线辐射性能测试场电磁模型并且分析多发射源结构之间的互耦影响以及对被测天线在同时工作情况下指向发生变化时它们之间可能会出现的耦合影响等关键问题进行研究进而论证方案可行性。对所建立的天线测试场模型进行仿真计算。仿真结果表明,新建立的天线测试场模型中各发射源位置选择恰当,结构间耦合影响满足环境指标要求,解决了多天线批量远场测试问题,能够为多天线辐射性能并行测量提供参考。

This article put forward an testing scheme which forms a complete set of antenna measurement institutions with radiation sources in airspace combination. The difficulty lies in how to build a more accurate electromagnetic model of field for antenna radiation performance testing and then analyse the mutual coupling effects between structure, including the analysis of coupling influence between the antenna under the condition of work at the same time and researching the key problems such as feasibility of the scheme. Simulation calculation was carried out based on the established model of antenna test field. The simulation results show that all the source location in new antenna testing field model is very appropriate, and the coupling influence between structures satisfies the requirement of en- vironmental indicators, which can solve the problem of multiple antenna＇ s batch testing in far field and can be used in testing of multiple antenna radiation performance parallel measurement.