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Cassegrain antenna

About: Cassegrain antenna is a research topic. Over the lifetime, 3207 publications have been published within this topic receiving 28278 citations.


Papers
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Journal ArticleDOI
Jose A. Martinez-Lorenzo1, Marcos Arias1, O. Rubinos1, J. Gutierrez1, A. Garcia-Pino1 
TL;DR: An improved version of the hourglass reflector antenna with a shaped profile to obtain a cosecant-squared elevation pattern, and with a feed array which is designed to achieve adequate and reconfigurable beamwidth in the horizontal plane.
Abstract: In this communication a reflector antenna is presented as a feasible solution for Local to Multipoint Distribution System base station with a reconfigurable number of sectorial beams. The antenna is an improved version of the hourglass reflector antenna with a shaped profile to obtain a cosecant-squared elevation pattern, and with a feed array which is designed to achieve adequate and reconfigurable beamwidth in the horizontal plane.

24 citations

Journal ArticleDOI
TL;DR: The conditions derived in Granet are extended to take into account the phase-center position of the feed, to achieve the minimum-blockage condition.
Abstract: For pt.1 see ibid., vol.40, no.2, p.76-82 (1998). An easy procedure to design classical Cassegrain or Gregorian dual-reflector antennas has been presented in Granet (1998). This procedure allows the antenna designer to fully define the antenna geometry with different sets of input parameters, depending on the requirements of the antenna size and its performance. In this paper the conditions derived in Granet are extended to take into account the phase-center position of the feed, to achieve the minimum-blockage condition. This procedure can be used as the starting point of a synthesis procedure, where both main reflector and subreflector are shaped to create the desired aperture-field distribution.

24 citations

Journal ArticleDOI
TL;DR: In this paper, an axially-displaced ellipse (ADE) dual-reflector antenna for the achievement of an omnidirectional coverage is proposed, and some relevant features are compared against previously suggested reflector antennas, designed for the same purpose.
Abstract: In this work, an axially-displaced-ellipse (ADE) dual-reflector antenna for the achievement of an omnidirectional coverage is proposed. Its geometry is briefly presented and some relevant features are compared against previously suggested reflector antennas, designed for the same purpose. The present ADE configuration is capable of yielding the desired aperture illumination with relatively smaller reflector dimensions, thus providing a compact arrangement suited for use at base stations of point-to-multi-point radio links. Numerical simulations are presented to illustrate the usefulness and advantages of the proposed reflector antenna. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 40: 250–254, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.11344

24 citations

Patent
29 Dec 1999
TL;DR: In this article, an antenna system comprising a feed array, a sub-reflector and a main reflector which are oriented to define a front-fed dual reflector antenna geometry is described.
Abstract: An antenna system comprising a feed array, a subreflector and a main reflector which are oriented to define a front-fed dual reflector antenna geometry. The feed array is comprised of a plurality of separate feeds which are aligned in a predetermined contour. Each feed array is coupled to a feed network which acts to combine the illumination beams of clusters of a preselected number of feeds to produce a plurality of composite illumination beams. Each composite illumination beam is directed to be incident upon a separate predetermined location on the subreflector which directs the composite illumination beams towards the main reflector. Each composite illumination beam is reflected by the main reflector in a preselected direction so that each composite illumination beam forms an antenna beam that impinges a predetermined coverage area on the Earth. Each antenna beam defines a separate coverage cell in the coverage area, wherein the position and orientation of the feeds, the subreflector and the main reflector provides antenna beams over a full Earth field of view coverage area where each antenna beam is approximately symmetrically shaped.

24 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202318
202267
202111
202018
201920
201824