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基于体-面混合积分方程方法,研究了介质导体复合结构目标的电磁散射特性.对导体采用面积分方程,对介质应用体积分方程,由等效原理建立以导体面电流及任意非均匀介质体极化电流为未知量的矩阵方程,利用稳定的双共轭梯度并结合快速傅立叶变换技术(BiCGS-FFT)来加速矩阵方程求解,相对于传统的矩量法大大降低了计算时间和内存需求.数值结果验证了该方法的正确性.同时,它为复杂复合结构目标散射特性研究奠定了一定的基础.
Based on the method of body-surface hybrid integral equation, the electromagnetic scattering characteristics of the composite conductor with dielectric conductor are studied. For the conductor, the integral equation is applied to the conductor, and the integral equation is established for the conductor by the equivalent principle. Polarization current is an unknowns matrix equation. Stabilized bi-conjugate gradient and Fast Fourier Transform (BiCGS-FFT) are used to accelerate the matrix equation. Compared with the traditional method of moment, the computational time and memory requirements are greatly reduced. The numerical results validate the correctness of this method, and at the same time, it lays a solid foundation for the research on scattering characteristics of complex composite structures.