Correction method for transverse defocussing of parabolic antenn

Details Correction method for transverse defocussing of parabolic antenn Correction method for transverse defocussing of parabolic antenn

1980-12-03

1982-12-21

Lieberman, Eli

Communications: radio wave antennas

Antennas

With means for moving directive antenna for scanning,...

343766, 343840, H01Q 312, H01Q 1912

Patent

active

043652522

ABSTRACT:
A correction method for transverse defocussing of paraboloid oriented relative to the source initially aligned with the focus consists of securing said paraboloid to first platform, articulating said first platform through hinge means jointed to second platform, itself articulated through further hinge means jointed to a stationary part, and then orienting said hinge means to said focus, while providing moving means for said platforms, said moving means being servocontrolled responsive to pointing error detector thereby to hold permanently said focus close to the source.
Provision is also made of a parabolic antenna comprising means for carrying out said method. The system is applied to radio and TV broadcast apparatus aboard satellites.

REFERENCES:
patent: 3166750 (1965-01-01), Ball
patent: 3262321 (1966-07-01), Moul
patent: 3333269 (1967-07-01), Vilbig et al.
patent: 3374977 (1968-03-01), Moy et al.
patent: 3565515 (1971-02-01), De Mey
patent: 3680141 (1972-07-01), Karikomi

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