Patent US6069586A successfully refreshed from Google Patents.
US6069586A
Expired / Lapsed
US
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Antenna operating with two isolated channels
Assignee: LGP Allgon Holding AB
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Filing: 1998-02-04
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Granted: 2000-05-30
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Expires: 2018-02-04
Abstract
Abstract An antenna for receiving and/or transmitting electromagnetic waves, comprising an array of antenna elements including at least one longitudinal row of antenna elements (7) located at a distance (d) from each other, each such row of antenna elements being adapted to receive and/or transmit a dual polarized beam including two separate, mutually isolated channels. Along each longitudinal row of antenna elements, in the vicinity of the gap between a respective pair of adjacent antenna elements, preferably at the side of the centre line (C) of the row, there are disposed parasitic elements (8a, 8b) serving to influence the mutual coupling between said adjacent antenna elements in such a way as to improve the isolation between the separate channels.
Inventors
- 👤 Dan Karlsson
- 👤 Stefan Jonsson
- 👤 Bo Karlsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:15
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/52; H01Q1/521; H01Q1/523; H01Q19/00; H01Q19/005; H01Q21/00; H01Q21/06; H01Q21/061; H01Q21/065; H01Q9/00; H01Q9/04; H01Q9/0407; H01Q9/0428
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
166 words
An antenna for receiving and/or transmitting electromagnetic waves, comprising: an array of antenna elements including at least one longitudinal row of antenna elements located at a distance from each other and defining gaps therebetween, parasitic elements located in the vicinity of the gaps between said antenna elements, two mutually isolated channels that receive and/or transmit dual polarized, mutually orthogonal waves from/to each of said antenna elements, wherein each of said parasitic elements include an elongated portion extending longitudinally substantially in parallel to a centre line of said longitudinal row of antenna elements, whereby each elongated portion has one end adjacent the antenna element and extend adjacent to the gap, and wherein said parasitic elements establish, in addition to an inevitable direct inter-channel coupling between the antenna elements in a respective pair of adjacent antenna elements, a further coupling between the antenna elements in said respective pair, said further coupling is phase shifted relative to said direct coupling to substantially reduce the resulting total inter-channel coupling therebetween.
Claim 2
Dependent Claim
166 words
An antenna for receiving and/or transmitting electromagnetic waves, comprising: an array of antenna elements including at least one longitudinal row of antenna elements located at a distance from each other and defining gaps therebetween, parasitic elements located in the vicinity of the gaps between said antenna elements, two mutually isolated channels that receive and/or transmit dual polarized, mutually orthogonal waves from/to each of said antenna elements, wherein each of said parasitic elements include an elongated portion extending longitudinally substantially in parallel to a centre line of said longitudinal row of antenna elements, whereby each elongated portion has one end adjacent the antenna element and extend adjacent to the gap, and wherein said parasitic elements establish, in addition to an inevitable direct inter-channel coupling between the antenna elements in a respective pair of adjacent antenna elements, a further coupling between the antenna elements in said respective pair, said further coupling is phase shifted relative to said direct coupling to substantially reduce the resulting total inter-channel coupling therebetween.
Claim 3
Dependent Claim
23 words
The antenna as defined in claim 1, wherein said parasitic elements are disposed symmetrically with respect to the centre line of said row.
Claim 4
Dependent Claim
18 words
The antenna as defined in claim 1, wherein said parasitic elements are made of an electrically conductive material.
Claim 5
Dependent Claim
24 words
The antenna as defined in claim 1, wherein said parasitic elements are made of a dielectric material having a dielectric constant greater than 2.
Claim 6
Dependent Claim
18 words
The antenna as defined in claim 1, wherein said parasitic elements are constituted by strips wires and/or rods.
Claim 7
Dependent Claim
22 words
The antenna as defined in claim 1, wherein the length of each parasitic element is at least λ/8, λ being the wavelength.
Claim 8
Dependent Claim
29 words
The antenna as defined in claim 1, wherein at least two of said parasitic elements comprise at least two elongated portions located longitudinally in series one after the other.
Claim 9
Dependent Claim
25 words
The antenna as defined in claim 1, wherein at least two of said parasitic elements include an elongated portion having at least one transverse stub.
Claim 10
Dependent Claim
21 words
The antenna as defined in claim 1, wherein the parasitic elements are located outside the centre line (C) of said row.
Claim 11
Dependent Claim
22 words
The antenna as defined in claim 9, wherein said parasitic elements are located outside the region of said row of antenna elements.
Claim 12
Dependent Claim
26 words
The antenna as defined in claim 1, wherein said parasitic elements are located substantially in the same plane as the antenna elements contained in said row.
Claim 13
Dependent Claim
33 words
The antenna as defined in claim 11, wherein said antenna elements are constituted by flat patches carried by a dielectric layer, and wherein said parasitic elements are carried by the same dielectric layer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-05-30 | 2003-11-29 | 2004-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-05-30 | 2007-11-29 | 2008-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-05-30 | 2011-11-29 | 2012-05-30 | $7700.00 | Window Closed / Lapsed |