Communications: radio wave antennas – Antennas – With coupling network or impedance in the leadin
Patent
1999-03-25
2000-11-21
Wong, Don
Communications: radio wave antennas
Antennas
With coupling network or impedance in the leadin
343700MS, H01Q 2100
Patent
active
061509930
ABSTRACT:
An indoor antenna for a UHF and higher frequency receiver has a plurality of polygon shaped conductive elements spaced apart from each other in a three dimensional arrangement. The signals from each pair of elements are combined through adjustable phase and attenuation networks and the combined signal is supplied to the input of a receiver that includes evaluation circuitry for optimizing the response of the antenna system when subjected to multipath conditions. A plurality of sets of random adjustment values are initially applied to the phase and attenuation networks and the antenna response over the signal band is monitored. The set of random values that exhibits the least deviation from the optimum antenna response over the received frequency band is used as the starting point for an optimization program for the calculation of further adjustments to the individual phase and attenuation networks to optimize the antenna response over the received signal band.
REFERENCES:
patent: 5038147 (1991-08-01), Cerro et al.
patent: 5200756 (1993-04-01), Feller
patent: 5734349 (1998-03-01), Lenormand et al.
Nguyen Hoang
Wong Don
Zenith Electronics Corporation
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