Journal ArticleDOI
GTD analysis of the radiation patterns of wide-flare corrugated conical and E-plane sectoral horns
M. Narasimhan,M. Sheshadri +1 more
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In this paper, the E -plane radiation patterns of wide-flare corrugated conical and E-plane sectoral horns were obtained employing the theory of Kouyoumjian and Pathak and the slope diffraction technique.Abstract:
The E -plane radiation patterns of wide-flare corrugated conical and E -plane sectoral horns ( 2\alpha_{0} ) excited in the dominant mode are obtained employing the theory of Kouyoumjian and Pathak [12] and the slope diffraction technique [11]. Besides the other parameters of the horn, the finite thickness of the corrugated edge has been taken into account with a view to improve the accuracy of the pattern computation. The analysis presented enables one to predict accurately radiation patterns over the main beam, near and far sidelobes, and the back lobes of the horns. Validity of the analysis is established by satisfactory agreement between the calculated and measured E -plane patterns of a few typical experimental wide-flare corrugated conical and E -plane sectoral horns.read more
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Approximate boundary conditions
TL;DR: Approximate boundary conditions are a means for simulating material and surface effects in scattering and propagation as discussed by the authors, and criteria for their validity are given for the validity of these conditions.
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Journal ArticleDOI
A uniform geometrical theory of diffraction for an edge in a perfectly conducting surface
R.G. Kouyoumjian,P.H. Pathak +1 more
TL;DR: In this article, a compact dyadic diffraction coefficient for electromagnetic waves obliquely incident on a curved edse formed by perfectly conducting curved plane surfaces is obtained, which is based on Keller's method of the canonical problem, which in this case is the perfectly conducting wedge illuminated by cylindrical, conical, and spherical waves.
Journal ArticleDOI
Evaluation of edge-diffracted fields including equivalent currents for the caustic regions
C. Ryan,Leon Peters +1 more
TL;DR: In this paper, the authors used the geometrical theory of diffraction to obtain the backscattered field for plane-wave incidence on a target with particular emphasis on those regions that are usually avoided, namely, the caustic region and its immediate vicinity.
ReportDOI
The dyadic diffraction coefficient for a perfectly conducting wedge
P. H. Pathak,R. G. Kouyoumjian +1 more
TL;DR: In this article, a ray-fixed coordinate system is introduced and used to derive a new, compact form of the dyadic diffraction coefficient for an electromagnetic wave incident on a perfectlyconducting wedge.
Journal ArticleDOI
Slope diffraction and its application to horns
TL;DR: In this article, a new slope diffraction function for the half plane is presented along with applications, which is valid through the shadow region and is applied to find the far-fields for a source on the surface of a conducting wedge.
Journal ArticleDOI
Pattern analysis of corrugated horn antennas
C. Mentzer,L. Peters +1 more
TL;DR: In this paper, the authors used a knowledge of the aperture fields to predict the pattern using aperture integration and diffraction theory, and verified the assumptions made concerning the aperture field were verified by probing the internal fields and aperture fields of an X band corrugated horn.