Improved point-matching method with application to scattering from a periodic surface

The method of modal expansions is a fundamental technique for solving the electromagnetic boundary value problems. As its practical alogrithm, the point-matching method has been used but frequently failed. A new computer-aided procedure based on the method of modal expansions is presented and applie...

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Bibliographic Details
Published in:I.R.E. transactions on antennas and propagation 1973-09, Vol.21 (5), p.657-662
Main Authors: Ikuno, H., Yasuura, K.
Format: Article
Language:English
Subjects:
Application software
Boundary value problems
Diffraction
Electromagnetic reflection
Electromagnetic scattering
Equations
Geometry
Gratings
Periodic structures
Rayleigh scattering
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Summary:The method of modal expansions is a fundamental technique for solving the electromagnetic boundary value problems. As its practical alogrithm, the point-matching method has been used but frequently failed. A new computer-aided procedure based on the method of modal expansions is presented and applied to the scattering from a periodic structure composed of a perfectly conducting surface. As an example, the scattering from the grating with a sinusoidal height profile is calculated. It is demonstrated numerically that the new procedure leads to desirable results, while the point-matching method does not. Several physical characteristics on the reflection grating including the diffraction anomalies are explored.
ISSN:0018-926X
0096-1973
1558-2221
DOI:10.1109/TAP.1973.1140592