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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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DOI
K.K. Chan1, A.R. Raab1
01 Aug 1981
TL;DR: In this article, a structural analysis of reflector antennas is presented, which involves the division of the reflector surface into triangular elements whose distortions are computed using NASTRAN, and the currents flowing on each distorted elemental surface are then used to give the diffracted fields.
Abstract: An important requirement in satellite antenna design is the prediction of the antenna performance when it is placed in the space orbital environment. An accurate estimate of its performance deterioration, caused by antenna distortions which are induced by the temperature extremes encountered, should be obtained. A method suitable for this type of analysis of reflector antennas is presented. It involves the division of the reflector surface into triangular elements whose distortions are computed using a structural analysis program (NASTRAN). The currents flowing on each distorted elemental surface are then used to give the diffracted fields. The computed results of an offset fed reflector are given. A way is suggested, which makes use of monopulse tracking, to minimise the performance degradation caused by the surface distortion.

7 citations

Patent
Corrado Dragone1
05 Dec 1977
TL;DR: In this paper, an antenna system for providing substantially perfect axial symmetry in the radiation pattern was proposed, which combines a curved main reflector, at least two confocal subreflectors disposed to sequentially reflect a ray in either direction between the main reflectors and a focal point of the antenna system as provided by the subreflector most distant along the feed axis from the main reflecting node.
Abstract: The present invention relates to an antenna system for providing substantially perfect axial symmetry in the radiation pattern which combines (a) a curved main reflector, (b) at least two confocal subreflectors disposed to sequentially reflect a ray in either direction between the main reflector and a focal point of the antenna system as provided by the subreflector most distant along the feed axis from the main reflector, and (c) a symmetrical feedhorn disposed at the focal point of the antenna system so that its longitudinal axis coincides with the equivalent axis of the antenna system.

7 citations

Proceedings ArticleDOI
20 Jun 1977

7 citations

Patent
29 Oct 2015
TL;DR: In this article, the second reflector is arranged relative to the first reflector in order to satisfy a near-field interference isolation criterion between the first and second antennae, where the distance between the antenna mounts is less than a distance between antenna mounts arranged in a plane.
Abstract: In one implementation, an apparatus includes: a first reflector portion having a first mount for a first antenna that is configured to operate in a first frequency range, where the first mount characterizes an emission point of a main lobe of the first antenna; and a second reflector portion having a second mount for a second antenna that is configured to operate in a second frequency range that overlaps the first frequency range, where the second mount characterizes an emission point of a main lobe of the second antenna. The second reflector portion is arranged relative to the first reflector portion in order to satisfy a near-field interference isolation criterion between the first and second antennae. In some implementations, the distance between the antenna mounts is less than a distance between the antenna mounts arranged in a plane due to increased spatial diversity between the first and second antennae.

7 citations

Proceedings ArticleDOI
25 Jul 2005
TL;DR: In this article, the deployment mechanism and reflector surface were designed and constructed using sheet aluminum, a fine metal mesh, an existing feed and low noise block, and a directionally adjustable base.
Abstract: A prototype is herein presented for a new mechanism for deploying reflector antennas introduced by the authors in M. Terada et al. (2005, 1999). The prototype, herein referred to as DRSAT (deployable reflector for satellite applications), was constructed using sheet aluminum, a fine metal mesh, an existing feed and low noise block, and a directionally adjustable base. The deployment mechanism and reflector surface were designed and constructed using these base materials. The DRSAT design employs a 39-cm offset reflector antenna, which when collapsed occupies less than 0.03 m/sup 3/. Computer simulations performed with the program PRAC (parabolic reflector analysis code) (M. Terada, 1999) were conducted to validate the design and assess the impact of surface errors during manufacturing.

7 citations


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