Antenna apparatus

Details Antenna apparatus Antenna apparatus

2006-11-07

2006-11-07

Wong, Don (Department: 2163)

Communications: radio wave antennas

Antennas

Slot type

C343S7000MS

Reexamination Certificate

active

07132992

ABSTRACT:
In order to have an antenna apparatus small in size and capable of switching its directivity pattern to be adaptive to multiple frequencies, the present invention provides an antenna apparatus having a first antenna element formed at an approximately center position of a planar printed circuit board and second antenna elements formed before and behind the first antenna element. It is possible to construct an antenna in which the first antenna element functions as a radiator and the second antenna elements function as a director or a reflector, respectively, by changing electrical length of the second antenna elements. The antenna becomes adaptive to multiple frequencies by feeding the second antenna elements at different phases to have the second antenna elements functioning as radiators.

REFERENCES:
patent: 3623109 (1971-11-01), Neumann
patent: 4631546 (1986-12-01), Dumas et al.
patent: 6320544 (2001-11-01), Korisch et al.
patent: 6384797 (2002-05-01), Schaffner et al.
patent: 6606057 (2003-08-01), Chiang et al.
patent: 6888505 (2005-05-01), Tran
patent: 2001/0005181 (2001-06-01), Desclos et al.
patent: 11-027038 (1999-01-01), None
patent: 11-168318 (1999-06-01), None
patent: 2003-142919 (2003-05-01), None

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