Material Realizations of Perfect Electric Conductor Objects

Authors

  • Ari Sihvola Department of Radio Science and Engineering Aalto University School of Science and Technology P.O. Box 13000, FI–00076 AALTO, Finland
  • Ismo V. Lindell Department of Radio Science and Engineering Aalto University School of Electrical Engineering PO Box 13000, FI-00076 Aalto, Finland
  • Henrik Wallén Department of Radio Science and Engineering Aalto University School of Electrical Engineering PO Box 13000, FI-00076 AALTO, Finland
  • Pasi Ylä- Oijala Department of Radio Science and Engineering Aalto University School of Electrical Engineering PO Box 13000, FI-00076 Aalto, Finland

Keywords:

Material Realizations of Perfect Electric Conductor Objects

Abstract

This article discusses the distinction between interfaces and boundaries in electromagnetics. Boundary conditions can be used to narrow down the computation domain of complex problems. However, terminating the space by a boundary condition is an approximation in real-world situations where fields penetrate across interfaces. To make this approximation accurate, the material parameters need to have a very strong contrast between the materials on the adjacent sides of the interface. In this article, the question is addressed how extreme the permittivity and permeability have to be in order to reasonably model a surface as a perfect electric conductor (PEC) boundary. It is argued that in addition to the large value of the permittivity, also a very small magnitude of the permeability is necessary in order to speed up the convergence of a material response towards the ideal PEC case.

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Published

2022-06-17

How to Cite

[1]
A. . Sihvola, I. V. . Lindell, . H. . Wallén, and P. Y.-. Oijala, “Material Realizations of Perfect Electric Conductor Objects”, ACES Journal, vol. 25, no. 12, pp. 1007–1016, Jun. 2022.

Issue

2010: Vol 25 Iss 12

Section

General Submission