开口腔体电磁散射的 GRE 法计算

Calculation of the EM Scattering from Open Cavities by Generalized Ray Expansion

利用广义射线法（ＧＲＥ）来研究开口腔体的电磁散射问题．简单描述了ＧＲＥ的计算方法，并提出了一种口径划分方法，其划分简单，而且具有足够的计算精度．用此法计算了圆口径开口腔体的雷达散射截面（ＲＣＳ），并给出了用入射反射线法（ＳＢＲ）及模式法计算的结果．同ＳＢＲ法比较，ＧＲＥ法更接近于精确的模式解．

Generalized ray expansion (GRE) method was used to study the problem of electromagnetic scattering by open cavities. The GRE method was briefly described,and a method of subaperture gridding was addressed which proved to be simple and efficient. Numerical results attained by this method were presented. Compared with the results from SBR methods, GRE method is more precise and efficient.