Antenna device commonly used for two frequencies

Details Antenna device commonly used for two frequencies Antenna device commonly used for two frequencies

2006-01-31

2006-01-31

Dinh, Trinh Vo (Department: 2821)

Communications: radio wave antennas

Antennas

Microstrip

C343S725000, C343S728000, C343S846000

Reexamination Certificate

active

06992634

ABSTRACT:
A patch antenna for a first frequency is disposed on a first face of a dielectric substrate, and has a first size. A coil antenna for a second frequency is disposed on the first face of the dielectric substrate so as to surround the patch antenna, and has a second size which is larger than the first size. A ground member is disposed on a second face of the dielectric substrate, and has a third size which is larger than the first size and smaller than the second size.

REFERENCES:
patent: 5300936 (1994-04-01), Izadian
patent: 5952971 (1999-09-01), Strickland
patent: 2004/0051675 (2004-03-01), Inoue
patent: 2004/0217907 (2004-11-01), Inoue
patent: 9-98014 (1997-04-01), None

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