Antenna device having radiation characteristics suitable for...

Details Antenna device having radiation characteristics suitable for... Antenna device having radiation characteristics suitable for...

2007-07-24

2007-07-24

Phan, Tho (Department: 2821)

Communications: radio wave antennas

Antennas

Microstrip

C343S767000

Reexamination Certificate

active

11314578

ABSTRACT:
An antenna device includes a plate-shaped conductor and a radiating conductor that extends outward from an end portion of the conductor and has a length corresponding to a quarter wavelength of a first frequency. A strip-shaped slot portion formed by removing a part of the plate-shaped conductor extending inward from the end portion has a length corresponding to a quarter wavelength of a second frequency. A feed portion is perpendicular to the slot portion and crosses over the slot portion. The feed portion feeds the same signals to the slot portion and the radiating conductor.

REFERENCES:
patent: 6664931 (2003-12-01), Nguyen et al.
patent: 6906669 (2005-06-01), Sabet et al.
patent: 2003/0043083 (2003-03-01), Huang
patent: 2004/0104851 (2004-06-01), Kadambi et al.
patent: 2003-133838 (2003-05-01), None

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