DocumentCode :
1285370
Title :
Electric-dipole radiation over a wedge with imperfectly conductive faces: a first-order physical-optics solution
Author :
Papadopoulos, Athanasios I. ; Chrissoulidis, Dimitrios P.
Author_Institution :
Dept. of Electr. & Comput. Eng., Aristotelian Univ. of Thessaloniki, Greece
Volume :
47
Issue :
11
fYear :
1999
fDate :
11/1/1999 12:00:00 AM
Firstpage :
1649
Lastpage :
1657
Abstract :
We solve a three-dimensional (3-D) electromagnetic diffraction problem involving an obtuse wedge with penetrable planar faces and an electric dipole which is parallel to the edge of the wedge. The analytical formulation is based on Stratton-Chu (1941) integrals of the electromagnetic field, which is excited by the dipole source on infinitely extending planes that coincide with the faces of the wedge. Fictitious charges are introduced along the edge to account for the discontinuity of the electromagnetic field on the faces across the edge. We evaluate asymptotically the integral expressions for the electric-field intensity far from the edge to obtain uniformly valid formulas. Our first-order physical-optics solution incorporates single reflection from both faces, the lateral wave, the edge-diffracted space wave, the edge-diffracted lateral wave, and transition terms which ensure that the electromagnetic field is finite and continuous at the single-reflection and lateral-wave boundaries. The numerical results establish the validity of this solution through a reciprocity check and comparisons with other analytical solutions
Keywords :
antenna radiation patterns; conducting bodies; dipole antennas; electromagnetic fields; electromagnetic wave diffraction; electromagnetic wave scattering; integral equations; physical optics; 3D electromagnetic diffraction problem; EM wave scattering; Stratton-Chu integrals; dipole source; edge-diffracted lateral wave; edge-diffracted space wave; electric-dipole radiation; electric-field intensity; electromagnetic field; first-order physical-optics solution; imperfectly conductive faces; infinitely extending planes; lateral wave; obtuse wedge; penetrable planar faces; Boundary conditions; Conductivity; Electromagnetic analysis; Electromagnetic diffraction; Electromagnetic fields; Electromagnetic radiation; Electromagnetic reflection; Electromagnetic scattering; Physical theory of diffraction; Surface impedance;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/8.814944
Filename :
814944
Link To Document :
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