Communications: radio wave antennas – Antennas – Wave guide type
Reexamination Certificate
2008-01-29
2008-01-29
Ho, Tan (Department: 2821)
Communications: radio wave antennas
Antennas
Wave guide type
C343S797000, C343S897000
Reexamination Certificate
active
07324057
ABSTRACT:
The present invention provides a parabolic dish reflector antenna for wireless communications that is dually polarized for diversity reception purposes while causing minimal visual disturbance for use with cellular base stations and repeaters. The antenna comprises a reflector of paraboloidal shape along both the longitudinal and latitudinal axes of its diameter. The reflector of the antenna is comprised of 4 identical quadrants assembled at the installation site, where each quadrant is made of thin metal ribs with large openings metal mesh stretched and attached to the ribs. The antenna further comprises a feed that is located around the focal point. The antenna feed comprises an open cup-shaped conductive cavity wherein the two orthogonally mounted feeding elements of the antenna located within its volume, are low cost printed circuit board elements.
REFERENCES:
patent: 4005433 (1977-01-01), Tsuda
patent: 4800393 (1989-01-01), Edward et al.
patent: 4893132 (1990-01-01), Habibi
patent: 5421376 (1995-06-01), Sinha
patent: 5952983 (1999-09-01), Dearnley et al.
patent: 6067053 (2000-05-01), Runyon et al.
Argaman Gideon
Shtern Shmuel
Angenehm Law Firm
Friederichs N Paul
Ho Tan
LandOfFree
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