Antenna-feeder device and antenna

Details Antenna-feeder device and antenna Antenna-feeder device and antenna

2005-11-28

2008-08-05

Phan, Tho G (Department: 2821)

Communications: radio wave antennas

Antennas

Wave guide type

C343S7810CA

Reexamination Certificate

active

07408522

ABSTRACT:
An antenna comprises: a main reflector being a body of revolution of parabolic shape; a sub-reflector being a body of the revolution of elliptic shape having a circle and a vertex oriented to the main reflector and being placed between the circle and the main reflector, one focal point of the sub-reflector being placed on the axis of revolution and the other focal point of the sub-reflector being placed out of the axis, the sub-reflector circle being placed in the plane of the main reflector edge circle; a radiator being placed along the axis of revolution of the main reflector and being placed between the main reflector and the sub-reflector; and wherein the sub-reflector has eccentricity ranging from 0.55 to 0.75.

REFERENCES:
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patent: 1804673 (1931-05-01), Chace
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patent: 6603437 (2003-08-01), Chang
patent: 6697028 (2004-02-01), Gothard et al.
patent: 6985120 (2006-01-01), Lewry et al.
patent: 7187340 (2007-03-01), Kralovec et al.
patent: 973583 (1963-04-01), None
patent: 61-245605 (1986-10-01), None

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