초록 ▼

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 anten

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.

대표청구항 ▼

[ What is claimed is:] [1.] An antenna system comprising:a plurality of antennas, each of said plurality of antennas outputting a radio frequency signal, each of said radio frequency signals having a power associated therewith, each of said plurality of antennas receiving said radio frequency signal

[ What is claimed is:] [1.] An antenna system comprising:a plurality of antennas, each of said plurality of antennas outputting a radio frequency signal, each of said radio frequency signals having a power associated therewith, each of said plurality of antennas receiving said radio frequency signal from a source, said source being located in a near field region of at least one of said plurality of antennas, said source being located a variable distance from at least one of said plurality of antennas;a detection circuit, the detection circuit being responsive to said radio frequency signals output from said plurality of antennas, said detection circuit outputting a control signal, said control signal being representative of which of said radio frequency signals has a greatest power; andan output circuit, said output circuit being responsive to said control signal, said output circuit outputting said radio frequency signal having said greatest power in response to said control signal, thereby increasing an immunity to said variable distance between said source and said at least one of said plurality of antennas.