Communications: radio wave antennas – Antennas – Microstrip
Reexamination Certificate
2005-12-13
2005-12-13
Le, Hoanganh (Department: 2821)
Communications: radio wave antennas
Antennas
Microstrip
C343S846000
Reexamination Certificate
active
06975272
ABSTRACT:
A circularly polarized wave antenna device contains a dielectric substrate provided on a ground conductor1, electrodes provided on the dielectric substrate to face the ground conductor. The electrodes form capacitors together with the ground conductor. A radiating conductor plate is made of a metal plate. Leg pieces are bent toward the dielectric substrate side at a plurality of locations on the radiating conductor plate. Two electric lengths on the radiating conductor plate that are generated in the directions passing the center of the radiating conductor plate and orthogonal to each other are equal to each other. Areas of the electrodes to which two leg pieces provided on a first line S3are connected are different from those of the electrodes to which two leg pieces provided on a second line S4are connected.
REFERENCES:
patent: 5181044 (1993-01-01), Matsumoto et al.
patent: 5864318 (1999-01-01), Cosenza et al.
patent: 6049314 (2000-04-01), Munson et al.
patent: 6133883 (2000-10-01), Munson et al.
patent: 6456249 (2002-09-01), Johnson et al.
patent: 7-297626 (1995-11-01), None
patent: 2002-237714 (2002-08-01), None
ALPS Electric Co. Ltd.
Brinks Hofer Gilson & Lione
Le Hoang-anh
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