AWE技术在三维介质目标宽带电磁散射特性中的应用

Application of Asymptotic Waveform Estimation Technique in Three Dimensional Dielectric Target's Broadband Electromagnetic Scattering

本文主要研究应用渐近波形估计(AWE)技术分析三维介质目标的电磁散射特性,首先应用AWE技术在介质目标中心频点求解一次积分方程,通过求解可得中心频点的电流系数;给定频段内未知电流系数则是利用外推得到,进而求得介质目标的宽频带电磁特性.文章对典型的三维介质目标:介质圆柱、介质立方体的雷达散射截面进行了计算.从计算结果上看,渐近波形估计技术和矩量法吻合得较好,但AWE技术的效率远远高于矩量法,证明了渐近波形估计技术是分析三维介质目标电磁散射特性的有效方法.文章研究的创新之处在于从计算结果、计算频率点数、CPU时间等方面证实了AWE技术的优势.

This paper mainly studies the application of asymptotic waveform evaluation( AWE) technique for analysis of 3 D electromagnetic scattering characteristics of dielectric objects. Firstly technology of AWE is applied in the media center frequency for a time integral equation,by solving the current coefficient of center frequency;the given frequency band of unknown coefficients is obtained by extrapolation of current, electromagnetic characteristics to calculate the broadband medium target zone. In this paper,the radar cross section of a typical three-dimensional dielectric target: dielectric cylinder and dielectric cube is calculated. The calculating result shows that the asymptotic waveform estimation technique agrees well with the moment method,but the efficiency of AWE is much higher than that of the method of moments,proved the asymptotic waveform evaluation technique is an effective method for the analysis of electromagnetic scattering characteristics of three-dimensional medium target.The innovation of this paper is that it confirms the advantages of AWE technology in terms of calculation results,calculation frequency points and CPU time.