Communications: radio wave antennas – Antennas – Wave guide type
Reexamination Certificate
2007-04-10
2007-04-10
Dinh, Trinh Vo (Department: 2821)
Communications: radio wave antennas
Antennas
Wave guide type
C343S772000, C343S785000
Reexamination Certificate
active
11311399
ABSTRACT:
A feedhorn, a radio wave receiving converter, and an antenna that can be reduced in size and have high reliability can be obtained. A feedhorn portion constitutes part of a converter, and includes a chassis body with a waveguide having an opening, a dielectric as a dielectric member connected to the opening, and a waterproof cover as a protective member. The waterproof cover covers the dielectric and contacts (tightly attached) to a portion of the surface of the dielectric (in the dielectric, the portion of the surface away from waveguide). The waterproof cover is formed of a material having substantially the same electric characteristics (permittivity and dielectric loss tangent) as the material forming the dielectric.
REFERENCES:
patent: 6501432 (2002-12-01), Yuanzhu
patent: 2005/0140560 (2005-06-01), Nagano et al.
patent: 2006/0125705 (2006-06-01), Nagano
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Nagano Atsushi
Okabe Yosuke
Dinh Trinh Vo
Sharp Kabushiki Kaisha
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