Dual near-field focused antenna array

Details Dual near-field focused antenna array Dual near-field focused antenna array

1999-05-24

2000-09-19

Phan, Tho

Communications: radio wave antennas

Antennas

Microstrip

343778, 343853, H01Q 138

Patent

active

061219339

ABSTRACT:
A communication system for transferring data through the air over a relatively short fixed distance comprising a transmitting antenna which comprises a leaky coaxial cable for radiating electromagnetic energy modulated with data to be transferred; and a plurality of non-linear fixed beam array antennas for receiving the modulated electromagnetic energy from the leaky coaxial cable. The plurality of fixed beam array antennas are juxtaposed with the transmitting antenna such that the transmitting antenna extends at least partially through the near-field regions of the plurality of fixed beam array antennas. The communication system also comprises a selection means which determines which radio frequency output from the plurality of non-linear fixed beam array antennas exhibits the greatest radio frequency power and outputs that particular radio frequency output to a receiver. Also described is a method of increasing the performance of an antenna system, which comprises the steps of inputting radio frequency signals from a plurality of antennas, selecting that radio frequency signal which comprises the greatest radio frequency power, and outputting the radio frequency signal comprising the greatest radio frequency power.

REFERENCES:
patent: 4074270 (1978-02-01), Kaloi
patent: 4328487 (1982-05-01), Cheal
patent: 4379296 (1983-04-01), Farrar et al.
patent: 4575728 (1986-03-01), Theobald et al.
patent: 5039994 (1991-08-01), Wash et al.
patent: 5486836 (1996-01-01), Kuffner et al.
patent: 5657024 (1997-08-01), Shingyoji et al.
patent: 5943017 (1999-08-01), Cosenza et al.

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