EP0270294A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Microwave reflector assembly
Assignee: Tsiger Technologies Inc
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Filing: 1987-11-24
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Granted: —
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Expires: 2007-11-24
Abstract
Abstract The present invention relates to a reflective assembly for use in an antenna for receiving an incident microwave signal having a wavelength X . The reflective assembly is comprised of a sequence of microwave reflective surfaces (10, 12, 14, 16, 20, 22, 24, 26, 52, 56, 62, 88, 90, 92, 94) facing in a common direction. Each reflective surface is at least a portion of a concave surface of one of a corresponding sequence of paraboloids (44, 46, 48, 50, 80, 82, 84, 86) that have a common axis and a common focal point (FP). A unit (8) is provided for mounting the reflective surfaces in an array such that when the incident microwave signal is received parallel to the access, each reflective surface reflects the incident microwave signal as a reflected microwave signal onto the common focal point, wherein each reflected microwave signal arrives at the common focal point in-phase with each other of the reflected microwave signals.
Inventors
- 👤 Brian H. Moore
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 07:26
CPC Classifications
H; H01; H01Q; H01Q15/00; H01Q15/14; H01Q1/00; H01Q1/40; H01Q15/16; H01Q15/165; H01Q15/167
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
182 words
A reflective assembly for use in an antenna for receiving an incident microwave signal having a wavelength X , characterized in that a sequence of microwave reflective surfaces (10, 12, 14, 16, 20, 22, 24, 26, 52, 58, 62, 88, 90, 92, 94) facing in a common direction, each said reflective surface being at least a portion of a concave surface of one of a corresponding sequence of paraboloids (44, 46, 48, 50, 80, 82, 84, 86) that have a common axis and a common focal point (FP), and means (8) for mounting said reflective surfaces in an array such that when said incident microwave signal is received parallel to said axis, each reflective surface reflects said incident microwave signal as a reflected microwave signal onto said common focal point, wherein each reflected microwave signal arrives at said common focal point in-phase with each other of said reflected microwave signals; and the focal length of each paraboloid differs by m À /2 from the focal length of a paraboloid directly adiacent in the sequence of paraboloids, where m is a non-zero integer.
Claim 2
Dependent Claim
182 words
A reflective assembly for use in an antenna for receiving an incident microwave signal having a wavelength X , characterized in that a sequence of microwave reflective surfaces (10, 12, 14, 16, 20, 22, 24, 26, 52, 58, 62, 88, 90, 92, 94) facing in a common direction, each said reflective surface being at least a portion of a concave surface of one of a corresponding sequence of paraboloids (44, 46, 48, 50, 80, 82, 84, 86) that have a common axis and a common focal point (FP), and means (8) for mounting said reflective surfaces in an array such that when said incident microwave signal is received parallel to said axis, each reflective surface reflects said incident microwave signal as a reflected microwave signal onto said common focal point, wherein each reflected microwave signal arrives at said common focal point in-phase with each other of said reflected microwave signals; and the focal length of each paraboloid differs by m À /2 from the focal length of a paraboloid directly adiacent in the sequence of paraboloids, where m is a non-zero integer.
Claim 3
Dependent Claim
76 words
The assembly of claim 1 characterized in that said means (8) for mounting said sequence of microwave reflective surfaces forms a region which is bounded by first and second major surfaces which are spaced an equidistance apart and edge surfaces and wherein said first and second major surfaces cut the concave surface of each paraboloid in said sequence of paraboloids such that each reflective surface of said sequence of reflective surfaces totally lies within said region.
Claim 4
Dependent Claim
22 words
The assembly of claim 2 characterized in that said first and second major surfaces are separated by a distance of λ /2.
Claim 5
Dependent Claim
32 words
The assembly of claim 3 characterized in that said first and second major surfaces are parallel to one another and are perpendicular to said common axis (Fig. 2, Fig. 3, Fig. 7).
Claim 6
Dependent Claim
34 words
The assembly of claim 3 characterized in that said first and second major surfaces are parallel to one another and are acutely inclined to said common axis towards said common focal point (Fig. 4).
Claim 7
Dependent Claim
26 words
The assembly of claim 3 characterized in that said first and second major surfaces are curved and are symmetrically oriented about the common axis Fig. 5.
Claim 8
Dependent Claim
27 words
An antenna including the reflective assembly according to claim 1, said antenna characterized in that a receiving means (34, 64) is located at the common focal point.
Claim 9
Dependent Claim
128 words
The assembly of claim 1 characterized in that said means for mounting the sequence of microwave reflective surfaces (8) includes a first square expanded polystyrene sheet (104) having a continuous front major surface 106, a back major surface and edge surfaces, the front major surface (106) including a plurality of areas, with each area occupied by one reflective surface (108, 110, 112, 114, 115) of said sequence of microwave reflective surfaces; microwave reflective means located on said major front surface for reflecting said reflected microwave signal to said common focal point; and tub means (102) tightly surrounding the back and edge surfaces of said first expanded polystyrene sheet and having an open front face oriented in the common direction to provide rigidity to said first expanded polystyrene sheet.
Claim 10
Dependent Claim
108 words
The assembly of claim 8 characterized in that said means for mounting the sequence of microwave reflective surfaces further includes a second square expanded polystyrene sheet (122) having major front and back surfaces and edge surfaces, said edge surfaces of the first and second expanded polystyrene sheets being congruent, said second expanded polystyrene sheet being located within said tube means (102) with the back surface being adjacent the front surface of said first expanded polystyrene sheet; and a weatherproof film (126) connected to said tube means across said open front face to seal the tube means, said second expanded polystyrene sheet and said weatherproof film being microwave transparent.
Claim 11
Dependent Claim
31 words
The assembly of claim 9 characterized in that the back surface of the second expanded polystyrene sheet is the mirror image of the front surface of the first expanded polystyrene sheet.
References Cited (Backward Citations)
No citation records indexed.
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