金属介质复合结构目标电磁散射特性

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.

Electromagnetic Scattering Properties Research of the Dielectric Conductor Composite Structure Targets

The electromagnetic scattering properties of dielectric conductor composite targets have been researched based on the volume/face mixed integral equations solution. According to the equivalent principle , the conductor is replaced by an equivalent surface electric current, and the dielectric is replaced by an equivalent volume polarization current. The respective boundary conditions on the dielectric and the conductor are utilized to solve for the electric current on the entire structure. The method of biconjugate gradients with the fast Fourier transform (BiCGS-FFT) is employed to accelerate the numerical computation.Finally, typical results are presented to illustrate the validity of this method. The presented method lays a solid foundation for the research on scattering properties of complex target with composite structures.