Linear-linear basis functions for MLFMA solutions of magnetic-field and combined-field integral equations
Date
2007
Authors
Ergul, O.
Gurel, L.
Editor(s)
Advisor
Supervisor
Co-Advisor
Co-Supervisor
Instructor
Source Title
IEEE Trans on Antennas Propagation
Print ISSN
0018-926X
Electronic ISSN
1558-2221
Publisher
Institute of Electrical and Electronics Engineers
Volume
55
Issue
4
Pages
1103 - 1110
Language
English
Type
Journal Title
Journal ISSN
Volume Title
Series
Abstract
We present the linear-linear (LL) basis functions to improve the accuracy of the magnetic-field integral equation (MFIE) and the combined-field integral equation (CFIE) for three-dimensional electromagnetic scattering problems involving closed conductors. We consider the solutions of relatively large scattering problems by employing the multilevel fast multipole algorithm. Accuracy problems of MFIE and CFIE arising from their implementations with the conventional Rao-Wilton-Glisson (RWG) basis functions can be mitigated by using the LL functions for discretization. This is achieved without increasing the computational requirements and with only minor modifications in the existing codes based on the RWG functions.