Patent EP0084420A2 successfully refreshed from Google Patents.
EP0084420A2
Expired / Lapsed
EP
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An antenna, particularly for the reception of satellite communications
Assignee: PA Consulting Services Ltd
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Filing: 1983-01-10
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Granted: —
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Expires: 2003-01-10
Abstract
Abstract A groundstation antenna comprises a body 1 of a foamed plastics material having on a rear parabolic surface a metallised coating (3) providing a main reflecting surface. A front surface of the body (1) has on a hyperbolic surface a metallised coating (2) providing a sub-reflector. A feed horn is received within a rear recess (4) in the body 1. The main reflector and the sub reflector are thus accurately located with respect to one another and protected from the weather. In an alternative embodiment (Figure 7), two casing members are joined at their outer peripheries to form an antenna of enclosed, hollow shell-like form.
Inventors
- 👤 Graham Leslie Maile
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 16:58
CPC Classifications
H; H01; H01Q; H01Q15/00; H01Q15/14; H01Q15/141; H01Q19/00; H01Q19/10; H01Q19/18; H01Q19/19
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
60 words
An antenna comprising a main reflector having a parabolic reflecting surface, a sub-reflector having a hyperbolic reflecting surface.and a microwave feed system aligned along the axis of the main reflector, wherein the two reflecting surfaces are accurately, permanently and non-adjustably located one with respect to the other and the two reflecting surfaces are protected from the environment surrounding the antenna.
Claim 2
Dependent Claim
60 words
An antenna comprising a main reflector having a parabolic reflecting surface, a sub-reflector having a hyperbolic reflecting surface.and a microwave feed system aligned along the axis of the main reflector, wherein the two reflecting surfaces are accurately, permanently and non-adjustably located one with respect to the other and the two reflecting surfaces are protected from the environment surrounding the antenna.
Claim 3
Dependent Claim
27 words
An antenna according to claim 1, wherein the main reflector and the sub-reflector are constituted by a single body of material coated to provide the reflecting surfaces.
Claim 4
Dependent Claim
18 words
An antenna according to claim 2, wherein the single body of material is a foamed synthetics plastics material.
Claim 5
Dependent Claim
21 words
An antenna according to claim 2 or 3, wherein the reflecting surfaces are applied to the body of material by spraying.
Claim 6
Dependent Claim
28 words
An antenna according to any of claims 2 to 4, wherein the body of material has a recess which receives a feed horn of the microwave feed system.
Claim 7
Dependent Claim
28 words
An antenna according to claim 5, wherein a mounting flange is secured to the body of material around the recess, the mounting flange serving to mount the antenna.
Claim 8
Dependent Claim
37 words
An antenna according to claim 1, wherein the main reflector and the sub-reflector are provided by respective casing members which are permanently joined together around their external edges to form a shell-like structure enclosing the reflecting surfaces.
Claim 9
Dependent Claim
30 words
An antenna according to claim 7, wherein the casing member providing the main reflector has an orifice in the centre thereof, the microwave feed system being located in the orifice.
Claim 10
Dependent Claim
30 words
An antenna according to claim 8, wherein a mounting flange for the antenna surrounds the orifice and supports the feed horn in alignment along the axis of the main reflector.
References Cited (Backward Citations)
No citation records indexed.
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