复杂目标宽带电磁散射特性幅相分离插值方法

Amplitude-Phase Detached Interpolation of Scattering from Complex Targets in a Broad Band

本文针对目标散射体表面感应电流的特性,提出了一种新的插值方法——幅相分离法,该方法将最佳一致逼近和相位提取结合起来,通过求解给定频带内的切比雪夫节点和节点处的表面电流,结合相位提取得到整个频带内的感应电流,从而快速有效地计算了复杂目标的宽带雷达散射截面.数值结果证明了方法的有效性和准确性.

The characteristic of surface electric currents on conducting objects is presented in this paper. A new interpolation theory（Amplitude-phase detached interpolation） is introduced. The best uniform approximation in conjugation with the phase extracted is applied to the conventional high-frequency method, The nodes of Chebyshev within a given frequency range were found firstly,and the surface electric currents at these nodes were computed by the conventional high-frequency method. Then the electric current distribution, which is used to compute the scattered fields and the wideband radar cross section （RCS）, can be obtained at any frequency within the given frequency range via amplitude-phase detached interpolation. The numerical results show that this method is efficient and accurate.