Journal ArticleDOI
GTD analysis of the radiation patterns of a shaped subreflector
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In this article, the principal plane radiation pattern of a subreflector shaped using the method enunciated by Collins has been analyzed based on the uniform geometrical theory of diffraction (UGTD).Abstract:
A technique of analyzing the principal plane radiation patterns of a subreflector shaped using the method enunciated by Collins [1] has been presented. The analysis is based on the uniform geometrical theory of diffraction (UGTD) [2], and a simplified procedure has been adopted in the determination of the principal plane radii of curvature of the subreflector. The numerical results obtained based on UGTD correlate well with those obtained using the method of physical optics (PO).read more
Citations
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A New Method of Designing Circularly Symmetric Shaped Dual Reflector Antennas Using Distorted Conics
TL;DR: In this article, a new method of designing circularly symmetric shaped dual reflector antennas using distorted conics is presented, where the surface of the shaped subreflector is expressed using a new set of equations employing differential geometry.
Journal ArticleDOI
Comments on "Wide-band diffraction improved dual-shaped reflectors"
TL;DR: In this article, a uniform procedure suitable for both large and small sub-reflector systems, is presented, which can be used for both dual-and single-antenna systems.
Journal ArticleDOI
Analysis of Electrically Small Hyperbolic Subreflectors Utilizing the Geometrical Theory of Diffraction
TL;DR: In this paper, the results for 3 to 8 λ -diameter hyperboloidal subreflectors, using the geometrical theory of diffraction (GTD) are presented and compared with the physical optics approach and other data.
References
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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
Design of dual-reflector antennas with arbitrary phase and amplitude distributions
TL;DR: In this paper, a generalization of the optical design is presented which allows the synthesis of reflector shapes for arbitrary phase and amplitude distributions in the aperture of the larger reflector with an arbitrary primary feed.
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.
Journal ArticleDOI
Diffraction by an arbitrary subreflector: GTD solution
TL;DR: Rahmat-Samii, Mittra, and Galindo-Israel as discussed by the authors studied the high-frequency asymptotic solution of diffraction by a conducting subreflector using Keller's geometrical theory.
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