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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25 Jun 2006
TL;DR: In this article, a new aspheric surface pre-collimation lenses system for the optical antenna of space laser communication has been optimum designed by optical design software CODE-V. By the use of Visual C++, an optical system design software has been set up to analyze optical antenna for the Space laser communication system, and some simulation results have been obtained.
Abstract: A new aspheric surface pre-collimation lenses system for the optical antenna of space laser communication has been optimum designed by optical design software CODE-V. Meanwhile, a Cassegrain antenna with aspheric surface has been designed. By the use of Visual C++, an optical system design software has been set up to analyze optical antenna for the space laser communication system, and some simulation results have been obtained.
13 citations
01 Oct 1976
TL;DR: Computed data based upon analytical models of the antennas and experimental results obtained from antennas constructed for operation at 30 GHz are presented for applications which include both communications and tracking radars.
Abstract: In many practical applications the performance of offset parabolic reflector antennas are limited by the reflectors' depolarising and beam-squinting properties. The paper describes progress in the development of a new class of primary-feed antennas which overcome these major limitations. Computed data based upon analytical models of the antennas and experimental results obtained from antennas constructed for operation at 30 GHz are presented for applications which include both communications and tracking radars.
13 citations
15 Mar 1978
13 citations
07 Aug 2002
TL;DR: The WARLOC radar has been integrated as a transportable system, using the 100 kW peak, 10 kW average power gyro-klystron amplifier, a low-loss transmission line, a quasioptical duplexer, and a Cassegrain antenna as discussed by the authors.
Abstract: High power millimeter wave instrumentation radars have a number of important applications ranging from defense missions to basic scientific studies At the Naval Research Laboratory, a new high power 94 GHz radar named WARLOC has been developed. This radar employs a high power gyro-klystron as the final power amplifier and was developed during 1996-2001. The WARLOC radar has been integrated as a transportable system, using the 100 kW peak, 10 kW average power gyro-klystron amplifier, a low-loss transmission line, a quasioptical duplexer, and a Cassegrain antenna. The transmitter operation and waveguide system is the subject of this paper.
13 citations
Patent•
15 Mar 2000
TL;DR: In this article, a multi-feed, multi-band antenna includes a parabolic dish reflector, a plurality of four-port feeds, and may also include one or more orthomode two-port feed.
Abstract: A multi-feed, multi-band antenna includes a parabolic dish reflector, a plurality of four-port feeds, and may also include one or more orthomode two-port feeds. Each four-port feed is constructed to conduct multiple frequency bands and multiple polarized RF signals within each of the bands. A mounting structure mounts each of the feeds at a different position in a line and in a plane parallel to the rim of the reflector. The four-port feeds are of a size which allows them to be mounted adjacent each other and two degrees apart. The mounting structure positions the feeds at a distance F from the reflector. The diameter D of the reflector and the distance F have a relationship such that F/D is less than approximately 0.5.
13 citations