Fixed-reflector antenna for plural telecommunication beams

Communications: radio wave antennas – Antennas – With spaced or external radio wave refractor

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Details

343840, 343757, 343761, 343914, H01Q 1910, H01Q 1514

Patent

active

052835910

ABSTRACT:
The antenna particularly for domestic, collective or community installations, receives plural telecommunication beams and comprises a preferably paraboloidal fixed reflector with an axis of symmetry. At least one grating of annular diffraction members is substantially symmetrical with regard to the axis and is placed parallel to the reflector. The grating defines first and second focal points symmetrical to the axis towards which are susceptible to converge first and second beams directed substantially parallel to straight lines going through the centre of the grating and through first and second focal points respectively. A microwave head can sweep the focal plane along a focal line, or several microwave heads are positioned on a gantry thereby receiving or emitting plural beams, though the reflector is fixed.

REFERENCES:
patent: 2043347 (1936-06-01), Clavier et al.
patent: 3189907 (1965-06-01), Buskirk
patent: 3384895 (1968-05-01), Webb
patent: 4837583 (1989-06-01), Chevallier et al.

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