快速分析非均匀介质体宽带散射特性的算法

doi:10.3969/j.issn.1001-2400.2015.05.014

Abstract

Abstract:

The asymptotic waveform evaluation (AWE) based on the volume integral equation (VIE) is applied to accelerate wide-band electromagnetic scattering properties of arbitrarily shaped inhomogeneous dielectric bodies. For the analysis over a single frequency, the discontinuity of the normal component of the volume current on both sides of the medium interface should be considered. Nevertheless, the problem can be solved well by adoption of VIE and expansion of the electric flux density with SWG basis functions. However, the wide-band analysis requires repeated radar cross section (RCS) calculations over different frequencies, which takes excessively much time. To acquire the prediction of wide-band RCS rapidly, in this paper, AWE greatly reduces the computation time by deducing and computing the high derivatives of the impedance matrix and excitation vector, expanding the electric flux density with the Taylor series and further broadening the bandwidth using padé approximation. Finally, numerical examples are displayed to demonstrate the accuracy and efficiency of this method.

Key words: volume integral equation, asymptotic waveform evaluation, wide-band scattering

ZHAO Bo;GONG Shuxi;WANG Xing;DONG Hailin. Fast analysis of wide-band scattering properties of inhomogeneous dielectric bodies[J].J4, 2015, 42(5): 80-85.

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Fast analysis of wide-band scattering properties of inhomogeneous dielectric bodies

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