Topic
Cassegrain antenna
About: Cassegrain antenna is a research topic. Over the lifetime, 3207 publications have been published within this topic receiving 28278 citations.
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24 May 1982
7 citations
TL;DR: The performance of offset Cassegrain antennas, shaped to provide wide scan angles, is outlined for use in earth stations which are capable of accessing several satellites simultaneously and Limitations on scan performance are discussed.
Abstract: The performance of offset Cassegrain antennas, shaped to provide wide scan angles, is outlined for use in earth stations which are capable of accessing several satellites simultaneously. The effect on the beam efficiency of scanning over a rectangular-shaped coverage region located about the geostationary arc is described. Limitations on scan performance are discussed as is the effect of satellite tracking by feed movement.
7 citations
Patent•
02 Feb 2002TL;DR: In this paper, a reflector and a satellite antenna system comprising of a single reflector were considered, and the extent of each respective plate toward the second reflector element was chosen so that the transmission losses in the first reflector elements were minimized.
Abstract: The invention concerns a reflector and a satellite antenna system comprising such a reflector. In the satellite antenna system, microwave radiation from one or more feed horns (5) is emitted at the reflector (1), which comprises first and second reflector elements (2, 3). Upon reflection of the radiation from the reflector elements (2, 3), a distinct beam shape for the reflected microwave energy is generated. The reflector elements (2, 3) are disposed at a fixed distance from one another so that radiation that passes the first reflector element (2) strikes the second element. The first reflector element (2) comprises a lattice structure aimed toward the feed horn, which lattice structure consists of plates (8) of electrically conductive material, wherein the distance between the plates and the depth of said plates are adapted for reflection of polarization parallel to the plates. The invention is characterized in that the extent of each respective plate toward the second reflector element is chosen so that the transmission losses in the first reflector element are minimized.
7 citations
Patent•
14 Jul 2000
TL;DR: In this article, the authors describe a broadband antenna with a spiral arm parallel to a reflector that has a dielectric layer (3b) and a metallic surface (3c).
Abstract: The broadband antenna has a spiral arm (2) that is parallel to a reflector (3) that has a dielectric layer (3b) and a metallic surface (3c). The separating distance (d) is set to suit the frequency range. The metal surface is organized as an array of elements.
7 citations
01 Jan 1977
TL;DR: The final author version and the galley proof are versions of the publication after peer review and the final published version features the final layout of the paper including the volume, issue and page numbers.
Abstract: • A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page numbers.
7 citations