时域有限差分(FD-TD)法在电磁幅射系统近场计算中的应用

Use of the Finite-Difference Time-Domain Method for calculating Near-Field of Electromagnetic Radiation Systems

本文讨论了用时域有限差分法计算电磁辐射系统的近场问题。为了验证所用方法的正确性和精确度,计算了几种辐射系统,其中包括结构复杂的环形相控阵列的辐射场。把理论计算所得结果与测量结果进行了比较,表明所用方法是可行的。

The near fields of electromagnetic radiation systems are calculated by using the Finite-Difference Time-Domain (FD-TD) method. It is proved by the results obtained in this paper that the FD-TD method is useful in this calculation. To verify the correctness and accuracy of this method, several kinds of radiation systems are calculated, including the radiation field with structure-complicated Annular Phased Afray(APA). The distribution of the radiation fields in the central space are obtained and compared with the experimental results.