Minimum Reflection Properties of Planar Impedance-Matched Boundaries

Reflection of plane electromagnetic waves from an impedance boundary with the surface impedance equal to the wave impedance of the surrounding medium is addressed. It is shown that compared with other impedance boundaries, the impedance-matched boundary guarantees the lowest mean reflectance when th...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2014-11, Vol.62 (11), p.5666-5670
Main Author: Osipov, Andrey V.
Format: Article
Language:English
Subjects:
Antennas
Boundaries
Electromagnetic reflection
Electromagnetic scattering
electromagnetic scattering by absorbing media
electromagnetic theory
Electromagnetic waves
Electromagnetics
Impedance
Incident waves
Metamaterials
microwave absorbers
optical reflection
Optical surface waves
radar scattering
Reflection
reflection coefficient
Reflectivity
remote sensing
Surface impedance
Surface waves
Thin films
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Summary:Reflection of plane electromagnetic waves from an impedance boundary with the surface impedance equal to the wave impedance of the surrounding medium is addressed. It is shown that compared with other impedance boundaries, the impedance-matched boundary guarantees the lowest mean reflectance when the incidence direction and polarization of the incident wave are random and uniformly distributed. In addition to the classical realization as a thick layer of a lossy magnetic material, the impedance-matched boundary can be realized as a thin layer of metamaterial absorber.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2014.2354415