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The PMCHWT equation of the double negative media (DNG) is obtained based on its constitutive relationship. And the surface currents and radar cross section (RCS) at a single frequency point is computed by Method of moments (MOM). The asymptotic waveform evaluation (AWE) technique for dispersive dielectric medium is deduced and applied to electromagnetic scattering analysis of double-negative medium...
A new incident source with different angles was constructed for dealing with wide-angle scattering problems. Considering the impendence matrix in method of moments (MOM) is independent from incident angles, the equivalent relationship between induced current and the measured CS-current was build, while the CS-current can be computed directly under the new incident source. Finally, we can reconstruct...
A new high-order basis function method based on the best uniform approximation theory is proposed to the solution of combined field integral equation (CFIE) for two-dimensional perfect electric conductor. The surface current is approximated by Chebyshev series. Under lower discretization than the conventional method of moments (MOM), the new high-order method can analyze the scattering problems of...
A new adaptive algorithm based on the Maehly approximation theory is proposed to complete the scattering analysis over a broad frequency band. Firstly, the Chebyshev polynomial approximation for surface current is obtained by using method of moments at frequency points corresponding to the Chebyshev nodes. Secondly, the Chebyshev series are matched via the Maehly approximation to a rational function...
A high-order PE method has been derived and analyzed for solving multi-object RCS for the first time. Compared with the existing method SPE, the present method has following features: Firstly, boundary conditions including PML and scatterers boundary conditions can be handled as easy as SPE method. Secondly, to obtain the full bistatic RCS, we need only two rotated PE runs for high-order PE while...
Estimating parameters of inverse scattering is very important for studies of characteristics of radar targets. In this paper, a modified state-space method for estimating parameters is presented. Unlike the original algorithm, a new Hankel matrix is constructed and incorporated an iterative method to refine the estimates. The validity and effectiveness of the method are proven theoretically and experimentally
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