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Fast modeling of electromagnetic scattering from 2D electrically large PEC objects using the complex line source type Green's function

Published online by Cambridge University Press:  08 January 2019

Deniz Kutluay  and
Taner Oğuzer
Deniz Kutluay*
Affiliation:
Dokuz Eylül University, Graduate School of Natural and Applied Sciences, Buca, İzmir-Turkey
Taner Oğuzer
Affiliation:
Electrical and Electronics Eng. Department, Dokuz Eylül University, Buca, İzmir-Turkey
*
Author for correspondence: Deniz Kutluay, E-mail: kutluaydenizz@gmail.com
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Abstract

This study introduces an alternative approach to the numerical solution of two-dimensional (2D) electromagnetic scattering problems by a numerical method of moments (MoM). The real source position vector is replaced by a complex quantity, then Green's function generates a complex source point beam, therefore the interactions between the far zone elements in the impedance matrix are neglected, except the basis functions near to the edges, strongly localizing the impedance matrix. The memory storage increases with the number of edges, but for a fixed number of the edges, it is linearly proportional with N, i.e. O(N). Consequently, the overall running time can be drastically reduced and the far zone scattering pattern and the near field can be found. The proposed procedure is first explained for the single perfectly electrically conducting (PEC) strip geometry, then extended to the scattering by 2D PEC objects with closed polygonal cross-sections. Numerical results are presented for a strip and a square cylinder in both polarizations. The relative errors are also compared with the standard MoM.

Keywords

Key wordsElectromagnetic scatteringcomputational electromagneticsradar cross section
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 11 , Issue 3 , April 2019 , pp. 276 - 286
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2019 

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