Adaptive shared aperture and cluster beamforming

Details Adaptive shared aperture and cluster beamforming Adaptive shared aperture and cluster beamforming

2007-01-09

2010-10-12

Chang, Kent (Department: 2617)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C343S853000

Reexamination Certificate

active

07813766

ABSTRACT:
An adaptive shared aperture and cluster beamforming antenna system includes an aperture with first and second sub-arrays, each having a plurality of antenna elements. The antenna system further includes first and second dividers configured to receive first and second signals from the first and second sub-arrays, respectively, and to provide a first and second plurality of divided signals to a corresponding first and second plurality of variable attenuators. The antenna system further includes a first combiner configured to receive a first attenuated signal from a first one of the first plurality of variable attenuators and a second attenuated signal from a first one of the second plurality of variable attenuators, and a second combiner configured to receive a third attenuated signal from a second one of the first plurality of variable attenuators and a fourth attenuated signal from a second one of the second plurality of variable attenuators.

REFERENCES:
patent: 4257050 (1981-03-01), Ploussios
patent: 5936592 (1999-08-01), Ramanujam et al.
patent: 6701141 (2004-03-01), Lam
patent: 6906665 (2005-06-01), Lam
patent: 6956537 (2005-10-01), Scherzer et al.
patent: 6965762 (2005-11-01), Sugar et al.
patent: 7009560 (2006-03-01), Lam et al.

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