Asymptotic waveform evaluation for scattering by inhomogeneous dielectric bodies of revolution

Abstract

In this article, an application of the asymptotic waveform evaluation technique to accelerate wideband scattering analysis by lossless dielectric objects is given. The solution is based on the volume integral equation together with the method‐of‐moments. Computational examples for so‐called bodies‐of‐revolution are given. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1028–1031, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22326

Wideband analysis of Luneburg lenses using VIE-BOR method combined with AWE

“…using proper derivatives of kernels present in (3). Suitable formulas can be found in author's paper [7]. 3.The right hand side of the matrix equation, depending on the excitation, is also expanded into Taylor series.…”

“…Moreover, the wideband computations are possible with use of the asymptotic waveform evaluation (AWE) method [5], [6]. The AWE scheme for the algorithm [4] is described in [7]. The examples of the radar cross section (RCS) calculations are given for lenses of moderate electrical size.…”

On the Far-Field Calculations Using AWE and the Method of Moments

“…In order to compare different attitudes, we perform example calculation of the RCS of a layered dielectric sphere using volume integral equation (VIE) formulation developed by the author for bodies with rotational symmetry [5].…”

“…Apart of other applications, it has been successfully used in conjunction with the integral-equations/method-of-moments (IE/MoM) method for wideband calculation of scattered fields. Applications include scattering by perfect electric conductor (PEC) objects [3], homogeneous dielectric bodies [4], and inhomogeneous dielectric bodies of revolution [5].…”

“…For each particular frequency point, the RCS is then computed independently, using known current distribution for this frequency. Here, we investigate another possibility, consisting of obtaining also approximations for the far-field operators.In order to compare different attitudes, we perform example calculation of the RCS of a layered dielectric sphere using volume integral equation (VIE) formulation developed by the author for bodies with rotational symmetry [5].The rest of this paper is organized as follows. First, the essentials of AWE method are outlined, with emphasis on calculation of secondary parameters from the approximate solution.…”