Lightweight folding parabolic reflector and antenna system

Details Lightweight folding parabolic reflector and antenna system Lightweight folding parabolic reflector and antenna system

1981-07-02

1985-07-02

Lieberman, Eli

Communications: radio wave antennas

Antennas

Antenna with parasitic reflector

343915, H01Q 1520

Patent

active

045271666

ABSTRACT:
A portable lightweight folding parabolic reflector antenna for reception of microwave signals includes an axial waveguide tube which constitutes the main structural supporting member of the antenna, a ten- to fifteen-foot diameter dish mounted to the waveguide and a sub-reflector supported at the forward end of the waveguide. A low noise amplifier may be mounted to the rear end of the waveguide for amplification of the received signals. The folding dish includes a single sheet of resiliently elastic reflecting mesh supported by a radial framework of normally straight resiliently flexible spokes of tapering cross section. The spokes are pivotable by a lever system between a folded axial position and a deployed radial position. The normally straight spokes are stressed upon deployment by a perimeter cable to the desired parabolic or spherical curvature and the elastic mesh is stretched over the convex side of the radial framework by the perimeter cable, so that the mesh assumes the curvature of the radial spokes to present a dished parabolic reflecting surface towards the subreflector.

REFERENCES:
patent: 2072262 (1937-03-01), Herzog et al.
patent: 2539511 (1951-01-01), Hansen et al.
patent: 2674693 (1954-04-01), Millett et al.
patent: 2829366 (1958-04-01), Armstrong et al.
patent: 2945234 (1960-07-01), Driscoll
patent: 3286270 (1966-11-01), Kelly
patent: 3635547 (1972-01-01), Rushing et al.
patent: 4249184 (1981-02-01), Vines

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