基于FDTD的机载短波天线辐射特性分析  

Analysis of Radiation Characteristic of Airborne Short Wave Antenna Based on FDTD Method

作　　者：孙文昌[1] 韦高[1] 姜通[1] 

机构地区：[1]西北工业大学,陕西西安710072

出　　处：《计算机仿真》2009年第9期80-83,共4页Computer Simulation

摘　　要：机载天线辐射特性的研究对于机载天线的设计与布局具有重要的意义。机载天线在机身的影响下会改变其原有辐射特性,针对上述问题采用时域有限差分法(FDTD)对机载短波天线的辐射特性进行了分析,并应用FDTD对某型号机载短波天线进行了仿真:使用软件建立整机模型,应用自适应网格对其进行了剖分,设置了PML吸收边界,添加激励并计算得出增益方向图,最后将仿真结果与实测结果进行了比较,二者在天线工作频带内吻合,验证了FDTD对机载天线辐射特性进行分析的有效性与实用性。Radiation characteristic is an important factor for the design and arrangement of airborne antennas. Owing to the affects of airframe, the airborne antenna＇ s radiation characteristic will be changed, so this paper analyzies the short wave airborne antenna based on FDTD, and then carries out a simulation for one type of short wave airborne antenna by FDTD： professional software is employed to model the airplane , PML is taken as absorbing boundary, then the antenna is powered and its radiation pattern is calculated. Finally, by comparing the results of simulation and measurements, it proved to be reliable and practicable to adopt FDTD for the analysis of electrically large antennas.

关 键 词：电大尺寸 机载短波天线 时域有限差分法 辐射特性 

分 类 号：TN822.3[电子电信—信息与通信工程]