车载体及地面环境对天线电磁特性的影响研究

与自由空间中不同,在实际复杂的电磁环境中,通信车载体及地面环境对天线的辐射特性会产生重要的影响。建立天线、通信车载体及地面环境一体化的仿真模型对提高仿真精度,指导工程应用具有重要的意义。本文应用FEKO仿真软件建立了准确的通信车载体模型,依据介质电参数建立了典型地面环境的等效模型,详细讨论了天线的架设高度以及天线的架设角度对天线的电磁特性的影响规律,为分析复杂电磁环境下天线的性能和系统间电磁兼容性预测问题提供了数据支持,具有重要的应用价值。

Radiation Characteristics of Rectangular Patch Antennas with an Array of Pins

The patch antennas with an array of pins （pin array patch antennas） with excellent radiation characteristics are investigated for various substrate thicknesses. The radiation in the horizontal plane of a pin array patch antenna is very small compared to that of a conventional patch antenna. And the increase of forward radiation and the decrease of backward radiation of a pin array patch antenna are obtained than those conventional one＇s. Also the half-power beamwidth of E -plane radiation pattern of a pin array patch antenna is narrower compared to that of the conventional so that the directivity is improved.