EP0355898A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A planar array antenna, comprising coplanar waveguide printed feed lines cooperating with apertures in a ground plane
Assignee: Individual
•
Filing: 1989-08-03
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Granted: —
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Expires: 2009-08-03
Abstract
Abstract This invention relates to a planar array antenna of the kind comprising coplanar feed lines (3) disposed in a flat circuit and cooperating by microwave coupling with a metal ground plane (7) pierced by apertures (2), the feed lines presenting a termination (6) juxtaposed with each aperture, and a reflecting lower plate (7) disposed at a distance of approximately a quarter wavelength, wherein the metal plane comprises a metal coating deposited on a dielectric substrate, the feed lines comprising microstrips disposed in channels (5) which open into the apertures, and the array of apertures, channels and microstrips being produced on the dielectric substrate by single face printed circuit techniques. The invention is applicable to antennas for reception of direct broadcasts from satellites.
Inventors
- 👤 Emmanuel Rammos
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 04:48
CPC Classifications
H; H01; H01Q; H01Q25/00; H01Q25/001; H01Q1/00; H01Q1/36; H01Q1/38; H01Q21/00; H01Q21/0006; H01Q21/0075
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
117 words
A planar array antenna including multiple planar circuits each consisting of dielectric material supporting a layer of conductive material having apertures and channels formed therein, and adapted to generate or receive microwave radiation having linear or circular polarization, comprising coplanar waveguide lines cooperating in microwave coupling with the apertures, said coplanar waveguide lines comprising a center conductor located within the channels, the channels issuing into the apertures and the center conductors penetrating into and terminating in the apertures to form probes, and a lower ground plane of conductive material parallel to the planar circuit, comprising the apertures and coplanar waveguide lines, located at a distance of approximately a quarter of the wavelength at which the antenna operates.
Claim 2
Dependent Claim
117 words
A planar array antenna including multiple planar circuits each consisting of dielectric material supporting a layer of conductive material having apertures and channels formed therein, and adapted to generate or receive microwave radiation having linear or circular polarization, comprising coplanar waveguide lines cooperating in microwave coupling with the apertures, said coplanar waveguide lines comprising a center conductor located within the channels, the channels issuing into the apertures and the center conductors penetrating into and terminating in the apertures to form probes, and a lower ground plane of conductive material parallel to the planar circuit, comprising the apertures and coplanar waveguide lines, located at a distance of approximately a quarter of the wavelength at which the antenna operates.
Claim 3
Dependent Claim
25 words
An antenna as claimed in claim 1, wherein the planar circuit is accommodated in a housing having a conductive base forming the lower ground plane.
Claim 4
Dependent Claim
22 words
An antenna as claimed in claim 1, wherein each aperture is fed by two orthogonal probes at a phase difference of 90°.
Claim 5
Dependent Claim
31 words
An antenna as claimed in any of claims 1 to 3, wherein a layer of dielectric material is interposed as a spacer between the lower ground plane and the planar circuit.
Claim 6
Dependent Claim
30 words
An antenna as claimed in any of claim 1, including two planar circuits, generating respectively right-hand and left-hand circular polarization, the apertures of the respective planar circuits being superimposed vertically.
Claim 7
Dependent Claim
15 words
An antenna as claimed in claim 1, including two planar circuits generating orthogonal linear polarizations.
Claim 8
Dependent Claim
39 words
An antenna as claimed in claim 1, wherein the apertures are disposed in sub-arrays of four apertures fed by two orthogonal probes with a phase difference of 90°, the respective apertures being rotated relative to each other by 90°.
Claim 9
Dependent Claim
18 words
An antenna as claimed in claim 4, wherein the dielectric layers have grooves juxtaposed to the center conductors.
Claim 10
Dependent Claim
24 words
An antenna as claimed in claim 4, including cavities within the dielectric layer whose upper edge is not in contact with the planar circuit.
Claim 11
Dependent Claim
29 words
An antenna as claimed in claim 9, wherein the cavities disposed in the dielectric layer comprise indents on their upper edges, the indents being juxtaposed to the center conductors.
Claim 12
Dependent Claim
20 words
An antenna as claimed in claim 9, comprising open cavities disposed in front of the cavities within the dielectric layer.
Claim 13
Dependent Claim
28 words
An antenna as claimed in claim 1, wherein each aperture is fed by one probe and comprises one central metallic bar at 45° with respect to the probe.
Claim 14
Dependent Claim
29 words
An antenna as claimed in claim 1, wherein each aperture is fed by one probe and comprises two diametrally opposed metallic bars at 45° with respect to the probe.
Claim 15
Dependent Claim
21 words
An antenna as claimed in claim 1, wherein each aperture is fed by one probe and the aperture is asymetrically shaped.
Claim 16
Dependent Claim
13 words
An antenne as claimed in claim 9, wherein the cavity comprises a septum.
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