体面积分方程(VSIE)分析任意复杂频率选择结构

Volume-surface Integral Equation for the Analysis of Arbitrarily Complex Frequency Selection Structures

本文提出了一种空域体面积分方程(VSIE)分析频率选择结构的方法。VSIE可以分析任意复杂结构,包括非均匀介质或金属与介质复合问题。利用Ewald变换可加速自由空间周期格林函数(PGF)的收敛。由于自由空间PGF相对平滑,适合用于插值计算。数值仿真结果验证了本文方法的可靠性与精确性。

In this paper,we present the space-domain volume-surface integral equation（ VSIE） method for the analysis of frequency selective structures（ FSS）. VSIE is used to analyze complicated FSS structure involved inhomogeneous dielectric or composite metallic and dielectric. The computation of the spatial domain periodic Green＇s function（ PGF） is accelerated by the Ewald transformation. The free-space PGF is very smooth and amenable to interpolation,resulting in a considerable reduction of matrix-filling time without any significant effect on the accuracy. Numerical examples show the reliability and accuracy of the proposed method.