Multiple beam planar array with parasitic elements

Details Multiple beam planar array with parasitic elements Multiple beam planar array with parasitic elements

1997-07-17

1999-07-27

Wong, Don

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343819, 343853, H01Q 2100

Patent

active

059298235

ABSTRACT:
A multiple beam antenna array utilizing strategically placed parasitic elements to control side lobe levels is disclosed. Two specific arrangements of such parasitic elements are taught. A first preferred arrangement of parasitic elements provides for their placement between a ground plane and a plane of active antenna elements. An alternative preferred arrangement of parasitic elements provides for their placement both between a ground plane and a plane of active antenna elements, as well as in front of the active antenna elements. Both such embodiments provide improved side lobe control over a similar antenna system without parasitic elements. Moreover, the characteristics of the main lobe are improved by both embodiments.

REFERENCES:
patent: 3742513 (1973-06-01), Ehrenspeck
patent: 4131896 (1978-12-01), Miller
patent: 4897664 (1990-01-01), Killackey et al.
patent: 5012256 (1991-04-01), Maddocks
patent: 5382959 (1995-01-01), Pett et al.
patent: 5485167 (1996-01-01), Wong et al.
patent: 5589843 (1996-12-01), Meredith et al.

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