EP0566522A1
Expired / Lapsed
EP
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Antenna system and method of manufacturing said system
Assignee: Celwave Rf AS
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Filing: 1993-04-14
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Granted: —
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Expires: 2013-04-14
Abstract
Abstract An antenna system comprises at least two dipole antennas (6) constituting an antenna module and is placed above and parallel with a common, artificial ground plane (5) in the form of an electrically conducting plate, for instance the bottom of a metal box (2). The dipoles (7) and the feed lines (8, 9, 10, 11) are designed as air dielectric strip-lines and are configured in one piece of a homogeneous material and extend mechanically and electrically in an uninterrupted manner from the dipoles to the antenna connector. The parts configured in one piece are produced by punching out sheet metal, and after suitable bending the parts are inserted in corresponding openings (16) in the ground plane (5).
Inventors
- 👤 Torben Funder
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 04:02
CPC Classifications
H; H01; H01Q; H01Q21/00; H01Q21/0087; H01Q21/06; H01Q21/061; H01Q21/062
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
116 words
Antenna system comprising at least two dipole antennas (6) constituting an antenna module (40) and placed above and parallel to a common, artificial ground plane (5) in the form of an electrically conducting plate, feed lines (8, 9, 10, 11) designed as wave guides with air dielectric from the dipoles to a common feeding point (4) and where the dipoles are carried by legs (17) which can form part of the feed lines, characterized in that the feed lines from each dipole (6) to the common point (4) and at least one dipole arm (7) in each dipole and possibly a matching leg (17) are configured mechanically and electrically in one piece of a homogeneous material.
Claim 2
Dependent Claim
116 words
Antenna system comprising at least two dipole antennas (6) constituting an antenna module (40) and placed above and parallel to a common, artificial ground plane (5) in the form of an electrically conducting plate, feed lines (8, 9, 10, 11) designed as wave guides with air dielectric from the dipoles to a common feeding point (4) and where the dipoles are carried by legs (17) which can form part of the feed lines, characterized in that the feed lines from each dipole (6) to the common point (4) and at least one dipole arm (7) in each dipole and possibly a matching leg (17) are configured mechanically and electrically in one piece of a homogeneous material.
Claim 3
Dependent Claim
33 words
Antenna system according to claim 1, characterized in that the legs (17, 17') of each dipole have an area (18) with reduced width or thickness in the end pointing away from the dipoles.
Claim 4
Dependent Claim
66 words
Antenna system according to claim 2, characterized in that the ground plane (5, 25) is the bottom of a box (2, 22) of an electrically conducting material and where the side opposite the bottom is open or of a non-electrically conducting material and where through-going openings (16) are provided in the ground plane corresponding to the reduced width or thickness of the dipole legs (17, 17').
Claim 5
Dependent Claim
46 words
Antenna system according to any of the claims 1-3, characterized in that at least one of the dipole legs (17') in each dipole (6) is positioned and fixed in relation to the feed line (8) by means of at least one holder (14) of dielectric material.
Claim 6
Dependent Claim
29 words
Antenna system according to claim 1, characterized in that the common feeding point is an antenna connector (4), to which a feed line is secured both mechanically and electrically.
Claim 7
Dependent Claim
45 words
Antenna system according to any of the claims 1-4, characterized in that it comprises a number of antenna modules (40) configured in one piece and coupled together by means of at least one additional feed line (28) and is placed in a common ground plane.
Claim 8
Dependent Claim
88 words
Method of manufacturing an antenna module for an antenna system according to claim 1, where the antenna system is made up of active antennas with matching feed lines and a common ground plane, characterized in that the part of the antenna module which is configured in one piece is punched or cut out of sheet metal (30) of electrically conducting material and that it is bent in previously defined points and secured by welding or soldering to an electrically conducting plate constituting a ground plane for the antenna.
Claim 9
Dependent Claim
44 words
Method according to claim 7, characterized in that also the parts which are not configured in one piece with the rest of the antenna module are punched or cut out of sheet metal and are secured to the ground plane by welding or soldering.
Claim 10
Dependent Claim
68 words
Method according to claim 7 or 8, characterized in that through-going holes (16) are made in the ground plane, preferably square holes, that the legs of each dipole are punched or cut out in such a manner that there are areas (18) with reduced width or thickness corresponding to the square holes, and that the soldering or the welding is made on the back of the ground plane.
Claim 11
Dependent Claim
55 words
Method according to claim 7, 8 or9, characterized in that during the punching or cutting out of the antenna parts, areas (14) are formed in parts which are to be positioned in relation to each other and that holders (13) are inserted in these areas, preferably before the parts are secured to the ground plane.
References Cited (Backward Citations)
DE2325704A1
Cited
DE9104722U1
Cited
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