Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Patent
1997-01-31
1998-06-23
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
455 73, H01Q 302
Patent
active
057710171
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 for receiving r.f. signals for a given call include a plurality of receive amplifiers (62; FIG. 6a) one for each beam of an antenna array, means for combining the outputs of the plurality of receive amplifiers, switching means for applying the combined receive signals to the r.f. transceiver handling the given call; and a single power amplifier (52; FIG. 6a) for transmitting r.f. signals for the given call for applying the transceiver transmit signal to an individual one of the beams.
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Davies, "Proposed Advanced Base Station Antennas for Future Cellular Mobile Radio Systems", A.T.R., vol. 22, No. 1, 1988, pp. 55-60.
Swales, "A Spectrum Efficient Cellular Base Station Antenna Architecture", 1991 Personal and Mobile Radio Communications Conference, Warwick, United Kingdom, pp. 272-279.
Broome Keith Roy
Chrystie Peter John
Dean Stuart James
Northern Telecom Limited
Phan Dao L.
Tarcza Thomas H.
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