Journal ArticleDOI
Large lateral feed displacements in a parabolic reflector
W. Imbriale,P. Ingerson,W. Wong +2 more
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In this paper, the radiation patterns of a parabolic reflector with large lateral-feed displacements are computed utilizing both the vector current method and scalar aperture theory, and compared to experimental results.Abstract:
The radiation patterns of a parabolic reflector with large lateral-feed displacements are computed utilizing both the vector current method and scalar aperture theory, and compared to experimental results. The theory is general enough to include asymmetric primary pattern illumination. The scalar and vector solutions are derived from the same initial equation so that the approximations used in obtaining the scalar solution are clearly displayed. Results from the vector and scalar theories are compared and the range of validity of the approximate analysis is indicated.read more
Citations
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Journal ArticleDOI
A new series representation for the radiation integral with application to reflector antennas
V. Galindo-Israel,Raj Mittra +1 more
TL;DR: In this paper, the radiated far field is determined from a rapidly convergent series representation of the radiation integral, where the coefficients of the series are independent of the observation angles, and the field may be determined very rapidly at large numbers of points.
Journal ArticleDOI
An efficient technique for the computation of vector secondary patterns of offset paraboloid reflectors
TL;DR: In this article, a series approach for the rapid computation of the vector secondary pattern of offset paraboloid reflectors wherein the feed is displaced is presented, which has been demonstrated to provide an efficient means for evaluating the radiation integral of symmetric parabolic reflectors without compromising the ease or speed of computation.
Book
Phased Arrays for Radio Astronomy, Remote Sensing, and Satellite Communications
TL;DR: Find a modern approach to the analysis, modeling and design of high sensitivity phased arrays by combining network theory, numerical methods and computational electromagnetic simulation techniques to enable full system analysis and design optimization.
Proceedings ArticleDOI
Full-sampling array feeds for radio telescopes
TL;DR: In this article, the array design constraints imposed by complete sampling of the fields near the reflector focus are examined, and a modified form of field matching is a good starting approximation.
References
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Journal ArticleDOI
Lateral-feed displacement in a paraboloid
TL;DR: In this article, the beam shift and degradation of a paraboloidal reflector with an offset feed is analyzed by the scalar plane wave theory, and the beam characteristics for a tapered circularly symmetric illumination are presented.
Journal ArticleDOI
Determination of the maximum scan-gain contours of a beam-scanning paraboloid and their relation to the Petzval surface
W.V.T. Rusch,A. Ludwig +1 more
TL;DR: In this paper, the scan-plane fields in the focal region of a beam-scanning paraboloid are determined from physical optics and the contours for maximum scan-gain are determined as a function of F/D and illumination taper and compared with the Petzval surface.
Journal ArticleDOI
Paraboloidal reflector patterns for off-axis feed
TL;DR: In this paper, the problem of predicting the radiation pattern for an asymmetrically illuminated paraboloid is covered in some detail, and the current distribution method is given in a final form suitable for machine computation.
Journal ArticleDOI
Experimental verification of the analysis of umbrella parabolic reflectors
W. Imbriale,P. Ingerson,W. Wong +2 more
TL;DR: In this paper, the authors extended the analysis to the case where the primary feed illumination is not symmetric, because real primary feeds usually have unequal E - and H -plane beamwidths.