Dual frequency lightweight deployable antenna system

Details Dual frequency lightweight deployable antenna system Dual frequency lightweight deployable antenna system

1995-05-22

1996-06-11

Hajec, Donald T.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343709, H01Q 2126

Patent

active

055260098

ABSTRACT:
A lightweight deployable antenna system capable of operating at two frequies concurrently, includes a canister providing an elongated chamber and mast therewithin. A conductor extends into the mast to provide radio signals to an antenna assembly and three broadband coaxial cables, which are coiled about a spacer and are electrically connected to the antenna assembly. The antenna assembly comprises four antenna elements of resiliently deflectable wire spaced at 90 degree intervals. Each antenna element has a generally helical coil and an elongate arm with a copper tape flag disposed on the distal end thereof. Pairs of the elongate arms form dipoles which are of differing lengths so that each pair of antenna elements resonates at a frequency which differs from the frequency at which the other pair resonates. Each elongate arm is adapted to extend downwardly in the canister in a non-deployable position and at a 45.degree. angle to a horizontal plane in a deployed position.

REFERENCES:
patent: 3702479 (1972-11-01), Uheig
patent: 3740754 (1973-06-01), Epis
patent: 3922683 (1975-11-01), Kumpebeck
patent: 4083051 (1978-04-01), Woodward
patent: 4218685 (1980-08-01), Ellis
patent: 4446465 (1984-05-01), Donovan
patent: 5091732 (1992-02-01), Mileski et al.

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