Telecommunications antenna

Details Telecommunications antenna Telecommunications antenna

1996-10-07

1999-01-19

Issing, Gregory C.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a steerable array

342361, H01Q 322, H01Q 2106

Patent

active

058618406

ABSTRACT:
An antenna system is comprised of a plurality of independently constructed and operated antenna units, upon which are mounted a plurality of transmit and receive antenna pairs. This structure provides a means for the antenna system to be arranged to provide substantially hemispherical radio coverage. By adjusting the phase of each version of a radio signal to the transmitter or received, the signal may be formed into a beam according to known techniques of directional beam forming providing the antenna system with directional gain. Additionally, using a plurality of transmit and receive antenna pairs reduces the energy transmitted by each transmit antenna alone to a level which permits a branch line coupler to be sufficient to orthogonally polarize the transmitted and received radio signals negating the requirement for the duplexing filter for duplex operation.

REFERENCES:
patent: 3854140 (1974-12-01), Ranghelli et al.
patent: 4124852 (1978-11-01), Steudel
patent: 4370012 (1983-01-01), Bevan et al.
patent: 5038147 (1991-08-01), Cerro et al.
patent: 5173711 (1992-12-01), Takeuchi et al.
patent: 5243354 (1993-09-01), Stern et al.
patent: 5247269 (1993-09-01), Boulouard et al.
patent: 5686926 (1997-11-01), Kijima et al.

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