Communications: radio wave antennas – Antennas – Wave guide type
Patent
1991-01-29
1993-02-16
Hille, Rolf
Communications: radio wave antennas
Antennas
Wave guide type
343840, H01Q 1300
Patent
active
051874911
ABSTRACT:
A radar type center fed antenna comprising a small radiating horn supported at the focal point of a parabolic reflector by three struts which are oriented to minimize the parallel polarization scattering and which have a low scattering ogive cross-section. The horn is mounted at the vertex of the parabolic surface and the intersection of the three struts using a bracket that provides minimal blockage. The struts are attached to the perimeter of the reflector. One strut having a feed waveguide is attached to the top-center of the reflector and the other two are attached at points on either side of the bottom-center at thirty degree angles to the vertical plane. The strut shape and feed-horn supporting and attaching arrangement and the integration of the feed waveguide into one of the struts results in a very low sidelobe antenna that produces a far-field pattern that has very low forward scattering due to feed and strut blockage.
REFERENCES:
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Michelson et al., "Terminal Doppler Weather Radar", Microwave Journal, Feb. 1990, pp. 139-148.
"A New Horn Antenna with Suppressed Sidelobes and Equal Beam-widths," P. D. Potter, Microwave Journal, vol. VI, pp. 195-202, Jun. 1963.
"Antenna Engineering Handbook", second edition, Richard C. Johnson and Henry Jasik, Editors, McGraw-Hill, Inc., 1983, Chapter 15.
"Radar Handbook," second edition, Merrill I. Skolnik, McGraw-Hill Inc., 1990, Chapter 6.
Chang Kaichiang
Geyh Edward A.
Schuss Jack J.
Upton Jeffrey C.
Dawson Walter F.
Hille Rolf
Le Hoang-anh
Raytheon Company
Sharkansky Richard M.
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