DocumentCode :
1358641
Title :
Oblique Diffraction of Arbitrarily Polarized Waves by an Array of Coplanar Slots Loaded by Dielectric Semi-Cylinders
Author :
Tsalamengas, John L. ; Vardiambasis, I.O.
Author_Institution :
Sch. of Electr. & Comput. Eng., Nat. Tech. Univ. of Athens, Athens, Greece
Volume :
60
Issue :
2
fYear :
2012
Firstpage :
1171
Lastpage :
1176
Abstract :
We study oblique diffraction of arbitrarily polarized plane-waves by a finite array of slots of infinite length on a common ground plane, backed by an array of dielectric semi-cylinders. The formulation is based on a combined eigenfunctions expansion and integral equation approach. For the diffracted field, series expansions in cylindrical wave functions are used to which several singular integral terms are superimposed that fully account for the presence of each of the slots. The relevant system of singular integral equations is discretized by an exponentially convergent Nyström method. Noticeably, all matrix elements take simple closed-form expressions. Numerical examples and case studies illustrate the convergence of the algorithm and bring to light the influence of the dielectric loads on the characteristics of the structure.
Keywords :
eigenvalues and eigenfunctions; electromagnetic wave diffraction; electromagnetic wave polarisation; integral equations; Nystrom method; coplanar slot; cylindrical wave function; dielectric load; dielectric semicylinder; diffracted field; eigenfunction expansion; finite array; matrix element; oblique diffraction; polarized plane-waves; series expansion; singular integral equation; Arrays; Convergence; Current density; Dielectrics; Equations; Integral equations; Manganese; Dielectric cylinders; Nyström method; electromagnetic diffraction; integral equations; slot arrays;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.2011.2173129
Filename :
6058620
Link To Document :
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