Communications: radio wave antennas – Antennas – With polarization filter or converter
Patent
1983-03-31
1986-09-16
Lieberman, Eli
Communications: radio wave antennas
Antennas
With polarization filter or converter
343781CA, 343915, H01Q 19195
Patent
active
046125507
ABSTRACT:
An inverted Cassegrain antenna utilizing polarization rotation. The polarizer-reflector or mirror utilized comprises two or more polarizer-reflector elements joined together around hinges perpendicular to the widening direction required. A sheet comprising parallel metal wires covers the whole of the elements. For each element, a metal film is separated from the sheet by a first dielectric layer. Each hinge is formed, on one side, by the flexible sheet of metal wires which straddles the gap between elements. The other side of the hinge includes a second dielectric layer backed by a rigid metal strip, also straddling the gap. One end of the metal strip is fixed to the metal film of one adjacent element while the other end of the metal strip is in moveable electrical contact with the metal strip of the other adjacent element. The antenna is particularly applicable to multiple function radars.
REFERENCES:
patent: 3161879 (1964-12-01), Hannan et al.
patent: 3576566 (1971-04-01), Cover et al.
patent: 3717879 (1973-02-01), Ganssle
patent: 4253100 (1981-02-01), Commault et al.
Brucker Jean-Michel
Estang Bernard
Lieberman Eli
Thomson - CSF
Wimer Michael C.
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