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Derivation and application of a class of generalized boundary conditionsBoundary conditions involving higher order derivatives are presented for simulating surfaces whose reflection coefficients are known analytically, numerically, or experimentally. Procedures for determining the coefficients of the derivatives are discussed, along with the effect of displacing the surface where the boundary conditions are applied. Provided the coefficients satisfy a duality relation, equivalent forms of the boundary conditions involving tangential field components are deduced, and these provide the natural extension to nonplanar surfaces. As an illustration, the simulation of metal-backed uniform and three-layer dielectric coatings is given. It is shown that fourth order conditions are capable of providing an accurate simulation for uniform coating at least a quarter of a wavelength in thickness.
Document ID
19900036543
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Senior, Thomas B. A.
(Michigan Univ. Ann Arbor, MI, United States)
Volakis, John L.
(Michigan, University Ann Arbor, United States)
Date Acquired
August 14, 2013
Publication Date
December 1, 1989
Publication Information
Publication: IEEE Transactions on Antennas and Propagation
Volume: 37
ISSN: 0018-926X
Subject Category
Electronics And Electrical Engineering
Accession Number
90A23598
Funding Number(s)
CONTRACT_GRANT: NAG2-541
Distribution Limits
Public
Copyright
Other

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