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本文提出天线近场等效增益的概念,并利用FEKO软件对几种航天领域常用的双反射面天线近场进行了仿真计算,由此得出天线的等效近场增益。根据仿真计算结果,总结出电大双反射面天线的近场增益分布规律。双反射面天线的辐射分为六个不同的区域,并给出相应区域的等效近场增益。该结果可应用电大天线微波辐射安全性和天线间电磁兼容性快速分析,具有较强的工程应用价值。
In this paper, the concept of near-field equivalent gain of antenna is proposed. The FEKO software is used to simulate the near-field of the commonly used double-reflector antenna in several aerospace fields. The equivalent near-field gain of the antenna is obtained. Based on the simulation results, the distribution of near-field gain of the antenna with double reflector is summarized. The radiation from the dual reflector antenna is divided into six different areas and gives the equivalent near-field gain for the corresponding area. This result can be applied to the microwave antenna radiation safety and rapid analysis of electromagnetic compatibility between antennas, with strong engineering application value.