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EP0647978A2
Expired / Lapsed
EP
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Base station antenna arrangement
Assignee: Nortel Networks Ltd
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Filing: 1994-07-21
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Granted: —
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Expires: 2014-07-21
Abstract
Abstract An antenna for a base station comprising a plurality of antenna arrays (40; Fig. 6a) each capable of forming a multiplicity of separate overlapping narrow beams in azimuth, the arrays being positioned such that the beams formed by the arrays provide a coverage in azimuth wider than each array. Means are provided for splitting (58; Figs. 14b,14c) the transmission output of a given transceiver into two signals prior to transmission power amplification and transmitting said signals in two adjacent narrow overlapping beams.
Inventors
- 👤 Jeffrey Graham Searle
- 👤 Stuart James Dean
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 22:37
CPC Classifications
H; H04; H04W; H04W16/00; H04W16/24; H04W16/28; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24; H01Q1/241; H01Q1/246; H01Q25/00; H04B; H04B7/00; H04B7/02; H04B7/04; H04B7/0408; H04W52/00; H04W52/04; H04W52/06; H04W52/14; H04W52/143; H04W52/30; H04W52/34; H04W52/343; H04W52/36; H04W52/367
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
80 words
An antenna comprising a plurality of layered antenna arrays (40; Fig. 6a) each capable of forming a multiplicity of separate overlapping narrow beams in azimuth, the arrays being positioned such that the beams provide a coverage in azimuth wider than each array; characterised in that the antenna includes means for splitting (58; Figs. 14b, 14c) the transmission output of a given transceiver into two signals prior to transmission power amplification and transmitting said signals in two adjacent narrow overlapping beams.
Claim 2
Dependent Claim
21 words
An antenna arrangement as claimed in claim 1 wherein the split signals are transmitted in quadrature in the two adjacent beams.
Claim 3
Dependent Claim
108 words
An antenna arrangement as claimed in claim 1 or 2 including azimuth beamforming means (44, 46; Fig 6a) for each array; a plurality of r.f. transceivers (84; Fig 6b) each for transmitting and receiving r.f. signals for one or more calls; switching matrix means (78, 82; Fig. 6b) for connecting each transceiver with one or other of the arrays via the beamforming means; and control means (80; Fig. 6b, 64; Fig. 6a) for controlling the switch matrix means whereby a particular transceiver is connected to a particular array, via the beamforming means, to exchange r.f. signals with a remote station located in the area covered by the antenna.
References Cited (Backward Citations)
No citation records indexed.
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