Communications: radio wave antennas – Antennas – Slot type
Reexamination Certificate
2005-12-13
2005-12-13
Le, Hoanganh (Department: 2821)
Communications: radio wave antennas
Antennas
Slot type
C343S795000, C343S789000
Reexamination Certificate
active
06975276
ABSTRACT:
A cavity backed millimeter-wave antenna comprises a dielectric cavity within a semiconductor substrate having walls defined by a plurality of vias through the substrate, and a gas cavity external to the substrate aligned with the dielectric cavity. A ground plane side of the substrate may be devoid of ground plane conductive material substantially between the walls of the dielectric cavity. In a slot-antenna embodiment, a microstrip feed line may be disposed on the substrate across a slot over the cavities. The slot may be a rectangular region without conductive material on a circuit side of the substrate over the dielectric cavity. In a dipole embodiment, a first pole comprising conductive material may be disposed on a ground plane side of the substrate over the cavities, and a second pole comprising conductive material may be disposed on a circuit side of the substrate over the cavities.
REFERENCES:
patent: 4958165 (1990-09-01), Axford et al.
patent: 5724049 (1998-03-01), Park et al.
patent: 6198445 (2001-03-01), Alt et al.
patent: 6847328 (2005-01-01), Libonati et al.
Alkov Lenoard
Finn Thomas J.
Le Hoang-anh
Raytheon Company
Vick Karl A.
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