Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Patent
1997-06-24
2000-01-18
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
342374, 455422, H01Q 322, H01Q 324, H01Q 326
Patent
active
06016123&
ABSTRACT:
An antenna arrangement (10) for a cellular radio base station is provided with a plurality of r.f. transceivers, including one or more antenna arrays (12) each comprising a plurality of sub-arrays (20) each selectively operpable to form a beam in azimuth. Each sub-army is provided with elevation beamforming means (24) and individual transmit and receive amplifiers (30,32). Each sub-array beamformer is coupled to at least one r.f. transmitter feed (26)nd each r.f. receiver feed is coupled to at least two sub-array beamformers, the sub-arrays of each antenna array together forming a multiplicity of separate substantially coincident beams in azimuth. A method of operation is also disclosed.
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Personal and Mobile Radio Communications Conference, 1991, Warwick pp. 272-279--Swales and Beach `A Spectrum Efficient Cellular Base Station Antenna Architecture`--pp. 276-278; Figs. 10,11.
Proceedings of the Mediterrean Ekectrotechnical Conference Melecon '89 Apr. 1989, Lisboa. pp. 493-496--Bartolucci et al. `Single Antenna Receivers for Advanced Satellite T/R Systems`--pp. 494-496; Figs. 2-6.
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Transactions of the Institute of Electronics, Information and Communication Engineers of Japan, vol. E74, No. 6, Jun. 1991, Tokyo JP pp. 1547-1555 Yamada et al. `Base and Mobile Station Antennas for Land Mobile Radio Systems`.
Barton Paul
Chrystie Peter John
Edwards Keith Russell
Searle Jeffrey Graham
Blum Theodore M.
Northern Telecom Limited
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