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Accuracy of Sources and Near-Zone Fields When Using Potential Integral Equations at Low Frequencies
Date
2017-01-01
Author
Gur, Ugur Meric
Ergül, Özgür Salih
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We consider method-of-moments solutions of the recently developed potential integral equations (PIEs) for low-frequency electromagnetic problems involving perfectly conducting objects. The electric current density, electric charge density, and near-zone fields calculated by using PIEs are investigated at low frequencies, in contrast to those obtained via the conventional electric-field integral equation (EFIE). We show that: 1) the charge density can accurately be found by using EFIE despite the very poor accuracy in the current density; 2) using PIEs instead of EFIE leads to accurate computations of the dominating solenoidal part of the current density, while the vanishingly small irrotational part and the charge density become inaccurate; 3) it is possible to accurately compute the charge density, in addition to the current density, when using PIEs, but at the cost of a solution of an additional integral equation. Numerical examples involving spherical objects are presented to demonstrate the accuracy of sources and near-zone fields when PIEs and EFIE are used.
Subject Keywords
Potential integral equations (PIEs)
,
Method of moments
,
Low-frequency problems
URI
https://hdl.handle.net/11511/40516
Journal
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
DOI
https://doi.org/10.1109/lawp.2017.2746016
Collections
Department of Electrical and Electronics Engineering, Article
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U. M. Gur and Ö. S. Ergül, “Accuracy of Sources and Near-Zone Fields When Using Potential Integral Equations at Low Frequencies,”
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
, pp. 2783–2786, 2017, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/40516.