ELECTRICALLY TILTED ANTENNA SYSTEM WITH POLARISATION DIVERSITY
First Claim
1. An antenna system including:
- a) a dual polarised antenna with electrical tilt adjustable polarisations;
b) a respective corporate feed means for relaying intermediate signals between each antenna polarisation and delaying means, each corporate feed means being arranged to provide for the electrical tilt of the associated antenna polarisation to be adjustable in response to relative delay of a plurality of intermediate signals and the delaying means providing for intermediate signals to be subject to relative delays;
c) a respective signal feeder associated with each antenna polarisation; and
d) two stations each for at least one of receiving and transmitting signals via the antenna polarisations and signal feeders, the antenna system being arranged such that each antenna polarisation is associated with a signal of one respective station and with a polarisation diversity signal of the other respective station.
2 Assignments
0 Petitions
Accused Products
Abstract
An electrically tilted antenna system with polarisation diversity has a dual polarised, tilt adjustable antenna (32). The antenna (32) has dipoles (34, 36) of two orthogonal polarisations associated with independently adjustable electrical tilt angles. The tilt angles are implemented by relative delays between corporate feed input or output signals, the delays being introduced by an antenna tilt assembly (54). Two signal feeders (F21, F22) associated with different antenna polarisations connect the antenna tilt assembly (54) to a base station filter assembly (50): the base station filter assembly 50 routes transmit signals from base stations (BS21, BS22) to different antenna polarisations via respective feeders (F21, F22) and the antenna tilt assembly (54). This assembly also divides receive signals from feeders (F21, F22) between both base stations (BS21, BS22). Each antenna polarisation is associated with transmit and receive signals of a respective base station (BS21 or BS22) and with a polarisation diversity signal of the other base station (BS22 or BS21). The antenna system may be used with two or more base stations operating with contiguous frequencies.
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Citations
18 Claims
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1. An antenna system including:
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a) a dual polarised antenna with electrical tilt adjustable polarisations; b) a respective corporate feed means for relaying intermediate signals between each antenna polarisation and delaying means, each corporate feed means being arranged to provide for the electrical tilt of the associated antenna polarisation to be adjustable in response to relative delay of a plurality of intermediate signals and the delaying means providing for intermediate signals to be subject to relative delays; c) a respective signal feeder associated with each antenna polarisation; and d) two stations each for at least one of receiving and transmitting signals via the antenna polarisations and signal feeders, the antenna system being arranged such that each antenna polarisation is associated with a signal of one respective station and with a polarisation diversity signal of the other respective station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of operating an antenna system having a dual polarised antenna with electrical tilt adjustable polarisations providing polarisation diversity and a respective corporate feed means associated with each antenna polarisation and providing for the electrical tilt of that antenna polarisation to be adjustable in response to relative delay of a plurality of intermediate signals, the method including:
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a) relaying intermediate signals between each antenna polarisation and providing for intermediate signals to be subject to relative delays; b) providing a respective signal feeder associated with each antenna polarisation; and c) using two stations each for at least one of receiving and transmitting signals via the antenna polarisations and signal feeders, each antenna polarisation being associated with a signal of one respective station and with a polarisation diversity signal of the other respective station. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification