Communications: radio wave antennas – Antennas – Antenna with parasitic reflector
Patent
1987-06-22
1989-04-04
Sikes, William L.
Communications: radio wave antennas
Antennas
Antenna with parasitic reflector
343880, 343882, 343765, H01Q 1912
Patent
active
048190071
ABSTRACT:
A reflector-type microwave antenna includes a paraboloidal reflector and a feed horn located at the focal point of the reflector for launching microwave signals onto the reflector and receiving microwave signals from the reflector. A supporting frame for the reflector and feed horn includes three arms extending along the rear side of the reflector to three spaced mounting locations on the rear side of the reflector. The arms are fastened to the spaced mounting locations on the rear side of the reflector by fastening means having a loose condition in which the arm is attached to the reflector but free to move relative to the reflector, and a tightened condition in which the respective arm is rigidly attached to the reflector. The fastening also includes swivel means for permitting tilting movement of the arm relative to the reflector surface when the fastening means is in the loose condition, and permitting the arm to assume different positions relative to the reflector when the fastening means is in the tightened condition. In its preferred form, the fastening means includes a cupped member having a peripheral flange secured to the rear side of the reflector so that forces transmitted between the respective arms and the reflector are distributed over the area of the reflector encompassed by the flanges.
REFERENCES:
patent: 3299428 (1967-01-01), Tessari
patent: 4251819 (1981-02-01), Vickland
patent: 4404565 (1983-09-01), Gurney et al.
patent: 4550319 (1985-10-01), Ganssle et al.
patent: 4652890 (1987-03-01), Crean
Andrew Corporation
Hoanganh Le
Rudisill Stephen G.
Sikes William L.
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