Broadband omnidirectional microwave parabolic dish-shaped cone a

Details Broadband omnidirectional microwave parabolic dish-shaped cone a Broadband omnidirectional microwave parabolic dish-shaped cone a

1997-04-22

2000-01-04

Wimer, Michael C.

Communications: radio wave antennas

Antennas

Wave guide type

343840, H01Q 1919

Patent

active

060115211

ABSTRACT:
An omnidirectional microwave antenna comprises a paraboloidal reflector disposed above the ground and facing downwardly with a substantially horizontal aperture and a substantially vertical axis. A vertically oriented feed horn is located below the paraboloidal reflector on the axis of the paraboloidal reflector and has a phase center located near the focal point of the paraboloidal reflector. A conical reflector having a shaped reflecting surface defined by the parameters of a mathematical equation extends downwardly away from the periphery of the feed horn for reflecting radiation received vertically from the paraboloidal reflector in a horizontal direction away from the conical reflector, and for reflecting horizontally received radiation vertically to the paraboloidal reflector. A radome extends downwardly from the outer periphery of the paraboloidal reflector and includes an absorber material for absorbing radiation propagated laterally from the feed horn and the conical reflector above the aperture of the feed horn.

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Colman et al. "W Sidelobe Antennas for Millimeter Wave Communication Systems" Electronics Technology Div. of Naval Research Lab., Washington, D.C. pp. 240-243.
Jakeichi et al., "The Omnidirectional Horn Reflector Antenna," G-AP International Symposium, Sep. 14-16, 1970, pp. 40-47.
M. Orefice and P. Pininoli, "Dual Reflector Antenna With Narrow Broadside Beam for Omnidirectional Coverage," Electronics Letters, vol. 29, No. 25, Dec. 9, 1993, pp. 2158-2159.
M. Orefice et al., "A Dual Reflector Antenna For Omnidirectional Coverage," IEEE Antennas and Propagation Society International Symposium 1993, 1993 International Symposium Digest Antennas and Propagation, vol. 1, Jun. 28-Jul. 2, 1993, pp. 274-277.

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