Charge Recovery for the RWG-Based Method of Moments

Author

Strydom, Willem J. ; Botha, Matthys M.

Author_Institution

Dept. of Electr. & Electron. Eng., Stellenbosch Univ., Stellenbosch, South Africa

Volume

14

fYear

2015

fDate

2015

Firstpage

305

Lastpage

308

Abstract

This letter is concerned with methods of obtaining a better approximation to the true surface charge density on a structure by post-processing the surface divergence of an RWG-based method-of-moments (MoM) solution current. It is shown that derivative recovery techniques developed for the finite element method (FEM) are not suitable. A simple and inexpensive recovery technique based on the properties of RWG basis functions is introduced for charge recovery in the MoM. Satisfactory performance of the proposed method is demonstrated, and its application to a posteriori error estimation is shown.

Keywords

computational electromagnetics; finite element analysis; method of moments; surface charging; FEM; MoM solution current; RWG-based method of moments; charge recovery; finite element method; posteriori error estimation; surface divergence post-processing; true surface charge density; Accuracy; Approximation methods; Error analysis; Finite element analysis; Method of moments; Smoothing methods; Surface treatment; Boundary element method; computational electromagnetics; electromagnetic surface integral equation; error estimator; gradient recovery; post-processing; smoothing;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2014.2362195

Filename

6918369