Communications: radio wave antennas – Antennas – With polarization filter or converter
Patent
1975-02-28
1977-01-04
Lieberman, Eli
Communications: radio wave antennas
Antennas
With polarization filter or converter
343840, H01Q 1912
Patent
active
040018369
ABSTRACT:
A parabolic dish is constructed by forming from relatively thin flexible sheet material a planar assembly of relatively narrow curved strips arranged side by side and having arcuate longitudinal edges which conform to curves defined by certain parametric equations, such that the strip assembly may be deformed to a parabolic dish configuration wherein the adjacent strip edges are disposed contiguous one another in planes parallel to a plane containing the principle axis of the dish, and joining the strips of the deformed strip assembly to retain the latter in its parabolic dish configuration. A polarizing parabolic dish antenna reflector is constructed by forming on the strips of the planar strip assembly, as by a photoetching process, a plurality of arcuate electrically conductive grid elements conforming to curves established by the parametric equations and bonding the strip assembly in its deformed parabolic dish configuration to a parabolic reflector dish to provide on the parabolic surface of the dish a polarizing grid comprising the grid elements disposed side by side in equally spaced planes parallel to a plane containing the principle axis of the dish.
REFERENCES:
patent: 2982961 (1961-05-01), Jones
patent: 3119109 (1964-01-01), Miller et al.
patent: 3340535 (1967-09-01), Damonte et al.
Archer John S.
McCracken Harry J.
Anderson Daniel T.
Dinardo Jerry A.
Lieberman Eli
Nyhagen Donald R.
TRW Inc.
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