渐近波形估计技术用于介质柱宽角度RCS的计算

渐近波形估计技术用于介质柱宽角度RCS的计算

内容简介：基于渐近波形估计(AWE)技术和矩量法(MOM)快速预测任意形状非均匀介质柱体的单站雷达散射截面RCS方向图，采用矩量法求解介质柱的电场积分方程，得到介质柱在某一给定方向入射波照射下的极化电流，然后利用AWE技术将任一角度入射波照射下的极化电流在给定角度附近展开成Taylor级数，通过Pade逼近将Taylor级数转化为有理函数，由此可获得介质柱在任一角度入射波照射下的极化电流，进而计算出RCS方向图。计算结果表明AWE完全能逼近MOM精确计算的曲线，同时可加快计算速度。

Abstract：The method of moments (MOM) in conjunction with the asymptoticwaveform evaluation (AWE) technique is applied to predict the mono-static radar cross section (RCS) pattern of an arbitrarily shaped two-dimensional dielectric cylinder. The electric field integral equation (EFIE) of a dielectric cylinder irradiated at a given direction by radar electromagnetic (EM) wave was solved using MOM to obtain the polarization current of the dielectric cylinder. In the AWE technique, the polarization current at a given angle was expanded in the desired angular band in a Taylor's series. The Taylor's series coefficients were then matched via the Pade approximation to a rational function. Using the rational function, the polarization current is obtained at any angle within the angular range, which is in turn used to calculate RCS of the 2-D dielectric cylinder. It is observed that AWE could result in considerable CPU time saving.

作者：童创明, 洪伟,

关键词：雷达散射截面, RCS, 矩量法, 渐近波形估计技术, 介质柱