NDLI: An implementation of the impedance-boundary CFIE using linear-linear basis functions and MLFMA

Content Provider	IEEE Xplore Digital Library
Author	West, J.C.
Copyright Year	2010
Description	Author affiliation: Electrical and Computer Engineering, Oklahoma State University, Stillwater, Oklahoma 74078 (West, J.C.)
Abstract	Impedance boundary conditions may be used with integral equation representations of electromagnetic fields to represent various boundaries such as highly lossy and corrugated surfaces. Glisson [1] implemented the three-dimensional impedance boundary electric field integral equation (IB-EFIE), using a moment method based on Rao-Wilton-Glisson (RWG) basis functions to find the electric current on the impedance surface. A limitation of this approach is that the solution is susceptible to inaccuracies when the frequency of the analysis is near an internal resonance of closed bodies that are modeled. More recently, Collino et al. [2] developed a three-dimensional impedance-boundary combined field integral equation (IB-CFIE) implementation that avoids the internal resonances of the IB-EFIE. Direct application of the impedance boundary condition to an electric surface current density expanded in divergence-conforming RWG basis functions yields a magnetic current density expanded in curl-conforming n×RWG basis functions, which gives errors due to the build-up of non-physical line charges when used directly in the CFIE. Collino et al. avoided this by mapping the n×RWG magnetic current expansion into an RWG expansion that avoids the line charges. This expansion was used to model all occurrences of the magnetic current in the IB-CFIE. Their application was limited to zero-order RWG basis functions. In this work, an IB-CFIE is discretized using first-order linear-linear (LL) basis functions. The implementation is derived from that in [2] in that the curl-conforming expansion of the magnetic current is mapped into a divergence-conforming LL expansion. However, this expansion is used only in the term of the IB-CFIE that leads to the charge build-up. The curl-conforming expansion is used in all other terms. This makes the IB-CFIE reduce to the IB-EFIE of [1] when the CFIE weighting constant is appropriately set.
Starting Page	1
Ending Page	4
File Size	197223
Page Count	4
File Format	PDF
ISBN	9781424449675
ISSN	15223965
DOI	10.1109/APS.2010.5561854
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-07-11
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Surface impedance Impedance Scattering Current density Magnetic resonance Boundary conditions Integral equations
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
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