Patent EP0591770A2 successfully refreshed from Google Patents.
EP0591770A2
Expired / Lapsed
EP
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Sectorized cellular radio base station antenna
Assignee: Motorola Solutions UK Ltd
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Filing: 1993-09-23
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Granted: —
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Expires: 2013-09-23
Abstract
Abstract A sectorized cellular radio base station antenna is provided comprising: a plurality (e.g. six) of angularly separated directional transmit antennas (11), each transmit antenna having a central access of transmission, for serving mobile units located in sectors centred on the axis of transmission of the transmit antennas; a plurality (e.g. six) of angularly separated directional receive antennas (30), each having a central axis of reception; and diversity combining means for combining signals from adjacent receive antennas. The central axis of the receiving antennas are at an angular offset to the central axis of the transmit antennas and, for a mobile in a given sector served by a given transmit antenna, the diversity combining means are arranged to combine the signals from the two receive antennas the axes of which lie on either side of that transmit antenna axis.
Inventors
- 👤 Michael James Dumbrill
- 👤 Idris John Mark Rees
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 08:50
CPC Classifications
H; H04; H04W; H04W16/00; H04B; H04B7/00; H04B7/02; H04B7/04; H04B7/0491; H04W16/24
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
138 words
A sectorized cellular radio base station antenna comprising: a plurality of angularly separated directional tranmit antennas (47-52), each transmit antenna having a central axis of transmission, for serving mobile units (60) located in sectors centred on the axes of transmission of the transmit antennas; a plurality of angularly separated directional receive antennas (30-35), each having a central axis of reception; and diversity combining means (41) for combining signals from adjacent receive antennas; characterized in that the central axes of the receive antennas are at an angular offset to the central axes of the transmit antennas and, for a mobile in a given sector served by a given transmit antenna, the diversity combining means are arranged to diversity combine the signals from the two receive antennas the axes of which lie on either side of that transmit antenna axis.
Claim 2
Dependent Claim
28 words
An antenna according to claim 1, wherein each transmit antenna has an area of transmission overlapping substantially half of the area of transmission of each adjacent transmit antenna.
Claim 3
Dependent Claim
30 words
An antenna according to claim 1 or 2, wherein each receive antenna has an area of reception overlapping substantially half of the area of reception of each adjacent transmit antenna.
Claim 4
Dependent Claim
32 words
An antenna according to any one of claims 1 to 3, wherein the central axis of each receive antenna approximately bisects the angle between the central axes of two adjacent transmit antennas.
Claim 5
Dependent Claim
34 words
An antenna according to any one of claims 1 to 4, wherein the diversity combining means comprise selection means for selecting the signal of greater strength from the signals from the two receive antennas.
Claim 6
Dependent Claim
29 words
An antenna according to any one of claims 1 to 4, further comprising maximum ratio diversity combining means for combining the signals from the two antennas in weighted proportions.
Claim 7
Dependent Claim
34 words
An antenna according to any one of the preceding claims comprising six transmit antennas at evenly distributed angles around the base station and six receive antennas at evenly distributed angles around the base station.
Claim 8
Dependent Claim
52 words
A base station comprising an antenna according to any one of the preceding claims in combination with a plurality of radio transceivers (41-46), each having first and second diversity receive ports and a plurality of splitter means (36-40), each splitter means connecting one receive antenna to diversity receive ports of two transceivers.
Claim 9
Dependent Claim
65 words
A base station according to claim 8, further comprising switching means connecting the splitters to the transceivers and connecting the transceivers to the transmit antennas, and control means (72) for selectively connecting a transceiver simultaneously to: (a) a transmit antenna and (b) a splitter connected to the two receive antennas the axes of which lie on either side of the axis of that transmit antenna.
Claim 10
Dependent Claim
135 words
A sectorized cellular radio base station antenna comprising: a plurality of angularly separated directional receive antennas (30-35), each receive antenna having a central axis of reception, for serving mobile units located in sectors centred on the axes of reception of the receive antennas; a plurality of angularly separated directional transmit antennas (47-48), each having a central axis of transmission; and splitter means (36-40) for splitting transmit signals to adjacent transmit antennas; characterized in that the central axes of the transmit antennas are at an angular offset to the central axes of the receive antennas and, for a mobile in a given sector served by a given receive antenna, the splitter means are arranged to pass a transmit signal to two transmit antennas, the axes of which lie on either side of that receive antenna axis.
References Cited (Backward Citations)
No citation records indexed.
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