Adaptive array antenna

Details Adaptive array antenna Adaptive array antenna

1986-03-03

1987-10-13

Sikes, William L.

Communications: radio wave antennas

Antennas

Antenna with parasitic reflector

343846, H01Q 344

Patent

active

047001976

ABSTRACT:
A small linearly polarized adaptive array antenna for communication systems is disclosed. The directivity and pointing of the antenna beam can be controlled electronically in both the azimuth and elevation planes. The antenna has low RF loss and operates over a relatively large communications bandwidth. It consists, essentially, of a driven .lambda./4 monopole surrounded by an array of coaxial parasitic elements, all mounted on a ground plane of finite size. The parasitic elements are connected to the ground plane via pin diodes or equivalent switching means. By applying suitable biasing voltage, the desired parasitic elements can be electrically connected to the ground plane and made highly reflective, thereby controlling the radiation pattern of the antenna.

REFERENCES:
patent: 2533078 (1950-12-01), Woodward
patent: 3560978 (1971-02-01), Himmel et al.
patent: 3725938 (1973-04-01), Black et al.
patent: 3846799 (1974-11-01), Gueguen
patent: 4631546 (1986-12-01), Dumas et al.

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