Circularly polarized dual frequency lightweight deployable anten

Details Circularly polarized dual frequency lightweight deployable anten Circularly polarized dual frequency lightweight deployable anten

1994-10-07

1996-05-21

Wimer, Michael C.

Communications: radio wave antennas

Antennas

With lumped reactance filter in active antenna

343709, 343797, 343821, H01Q 2126, H01Q 134

Patent

active

055194079

ABSTRACT:
A deployable antenna assembly includes a canister providing an elongated mber and an elongated hollow mast with a mounting member on its upper end. A coaxial cable extends into the hollow mast to provide radio signals to the antenna assembly of four antenna members of resiliently deflectable members spaced at 90 degree intervals about the periphery of a mounting plate. In the non-deployed position elongated arms extend downward along the inner wall of a canister. A resonant circuit having an inductive coil and a capacitor are located at an intermediate position on the arms. A smooth material is placed between the resonant circuit and the wall of the canister to prevent scraping and damage to the resonant circuit upon deployment. Each opposed pair of antenna element comprises a dipole. A pair of baluns are formed by the arrangement of coaxial cable. A hybrid circuit forming a phase shifter is securely affixed to a mounting plate.

REFERENCES:
patent: 3176298 (1965-03-01), Nettles
patent: 3769622 (1973-10-01), Munson
patent: 3789416 (1974-01-01), Kuecken et al.
patent: 5091732 (1992-02-01), Mileski et al.

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