Patent
Antenna structure with relatively offset reflectors for electromagnetic detection and space telecommunication equipment
TLDR
In this article, an antenna structure includes an at least partly parabolic main reflector and an auxiliary reflector, the two reflectors having confronting concave surfaces and lying respectively above and below a horizontal plane including a common focus of these surfaces.Abstract:
An antenna structure includes an at least partly parabolic main reflector and an auxiliary reflector of generally similar configuration, the two reflectors having confronting concave surfaces and lying respectively above and below a horizontal plane including a common focus of these surfaces. A corrugated horn illuminating the auxiliary reflector extends at the level of the latter, with a substantially horizontal axis, between vertical planes passing through the vertex of the parabolic main-reflector surface and through the common focus; in one embodiment, the horn forms with the auxiliary reflector a unitary assembly closed on all sides except for an upper aperture facing the main reflector.read more
Citations
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Patent
Antenna arrangements using focal plane filtering for reducing sidelobes
TL;DR: In this article, the main reflector is made slightly oversize to intercept the smoothened-out image of the feed aperture illumination along a line which produces a predetermined level of edge intensity.
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Microwave hematoma detector
TL;DR: The Microwave Hematoma Detector (MHT) as mentioned in this paper is a non-invasive device designed to detect and localize blood pooling and clots near the outer surface of the body.
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Bicollimated offset Gregorian dual reflector antenna system
TL;DR: A dual reflector antenna has two reflectors concave to each other and specially shaped so that beams incident on the antenna from two directions are reflected therefrom in collimated beams in two other directions as discussed by the authors.
Patent
Shaped dual reflector antenna system for generating a plurality of beam coverages
TL;DR: In this paper, a dual-reflector antenna system is provided for generating a shaped main beam radiation pattern (20) and at least one additional secondary spot beam radiation patterns (30,32).
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Compact scanning beam antenna feed arrangement
TL;DR: In this paper, a feed arrangement for compact scanning beam antennas is proposed, which comprises a linear phased array of small feed elements, which form an approximate line source that radiates a wedge-shaped cylindrical beam toward a subreflector, which is shaped to focus the beam to a point source which then produces a spherical wavefront.
References
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Patent
Antenna system including a paraboloidal reflector and an exciter
TL;DR: In this paper, an improved antenna system of the type including a parabolic antenna with offset exciting in which only the upper portion of the parabola is used, an approximately horizontal bottom plate, and an exciter which is disposed above the bottom plate was presented.
Patent
Scanning antenna with moveable beam waveguide feed and defocusing adjustment
Hiroshi Yokoi,Masataka Akagawa +1 more
TL;DR: In this paper, an aperture antenna consisting of at least one reflector, a primary radiator, and a plurality of movable beam-wave-guide reflectors arranged between the reflector and the primary radiator is used for directing electric waves from the primary radiators towards the reflectors.
Patent
Corrugated horn fed offset paraboloidal reflector
TL;DR: In this article, a high frequency antenna achieves low signal-levels in far-out sidelobe andacklobe antenna pattern regions through utilization of a corrugated feed-horn acting as a non-axial source for a cooperating parabolic reflector.
Patent
Casseyrain antenna system with rotatable main reflector for scanning
Mitsuo Tanaka,Masao Kamimura +1 more
TL;DR: In this paper, the authors present an antenna system consisting of a main radar, a sub-reflector, and a main reflector, capable of transforming the ELECTROMAGNETIC WAVE from the SUB-Reflector into a plane wave and emitting it into the air or space.