DocumentCode :
1033975
Title :
Scattering from a periodic array of apertures or plates where the conductors have arbitrary shape, thickness, and resistivity
Author :
Rubin, Barry J.
Author_Institution :
IBM Corporation, Yorktown Heights, NY, USA
Volume :
34
Issue :
11
fYear :
1986
fDate :
11/1/1986 12:00:00 AM
Firstpage :
1356
Lastpage :
1365
Abstract :
The scattering properties of a periodic array of conductors having any shape composed of steps along the coordinate axes and illuminated by a plane wave are obtained through a rooftop current approximation. The solution, which involves a finite dimension matrix equation, is described along with an algorithm that efficiently generates the matrix elements. Results presented for arrays of rectangular apertures and thin, rectangular plates are shown to agree closely with those obtained through standard modal approaches. Convergence with respect to the number of current elements is also explored. Because the normal component of the edge current is nonzero and continuous when thickness is present, convergence is significantly better than for zero-thickness structures. At glancing incidence, however, accuracy requires a finer subsection grid to properly represent the circulating current on the sidewalls, for plates, and the U-shaped current flowing near the corner of the sidewalls, for apertures.
Keywords :
Apertures; Arrays; Electromagnetic scattering by periodic structures; Plates; Apertures; Boundary conditions; Conductivity; Conductors; Convergence; Equations; Scattering; Shape; Surface resistance; Transmission line matrix methods;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.1986.1143765
Filename :
1143765
Link To Document :
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