Broadband directional antenna having binary feed network with mi

Details Broadband directional antenna having binary feed network with mi Broadband directional antenna having binary feed network with mi

1990-10-25

1993-12-28

Hajec, Donald T.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343821, 343812, 343789, 343814, H01Q 916

Patent

active

052743918

ABSTRACT:
A broadband antenna array, formed of pairs of horizontally-spaced dipoles that are balun-fed, uses an air dielectric microstrip binary-feed network to optimize antenna bandwidth. Each dipole is fed by a three-wire balun which maintains the proper current distribution on the dipoles over the operating bandwidth. The binary-feed network feeds each dipole individually to further optimize the antenna's pattern bandwidth. The binary-feed network is formed using a conductive ground plane with spaced conductors to utilize an air dielectric, thereby minimizing antenna losses in the feed network. The feed network impedances are chosen to give a broadband impedance match to the dipoles, and the entire assembly of binary-feed network and dipoles is mounted in a reflector box, the dimensions of which are chosen to control the antenna beamwidth. Vertically stacked pairs are used to compress the vertical radiation pattern for greater antenna gain.

REFERENCES:
patent: 2130033 (1938-09-01), Schariau
patent: 2455403 (1948-12-01), Brown
patent: 3482253 (1969-12-01), Zucconi
patent: 3496570 (1970-02-01), Lewis
patent: 3681771 (1972-08-01), Lewis et al.
patent: 3747114 (1973-07-01), Shyhalla
patent: 3750185 (1973-07-01), Evans
patent: 4031537 (1977-06-01), Alford
patent: 4518969 (1985-05-01), Bogner
patent: 4929961 (1990-05-01), Nakase

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