Wavelet Based MBPE Technique for Fast RCS Computation of DNG Metamaterials

Abstract

Described by the drude model, the DNG metamaterials is essentially a dispersive media, the scattering analysis of it over broad band by asymptotic waveform evaluation (AWE) technique is difficult since the computation of high order differential coefficients for the impedance matrix elements, to reduce the differential order, the model-based parameter estimation (MBPE) technique based on two expanded points is applied to analysis the scattering characters of double-negative (DNG) metamaterials. A wavelet matrix transform (WMT) is used to get a sparse matrix equation in wavelet-domain, which is solved over a broad frequency band by the MBPE. As compared with AWE, the MBPE technique obtained more accurate results over a broader frequency band.