Communications: radio wave antennas – Antennas – Antenna with parasitic director
Reexamination Certificate
2007-11-20
2010-06-29
Cho, James H. (Department: 2819)
Communications: radio wave antennas
Antennas
Antenna with parasitic director
C343S846000
Reexamination Certificate
active
07746286
ABSTRACT:
An antenna device suitable for short distance wireless communication is provided which can have a good symmetry of directional characteristics and increase a gain at both end sides in a longitudinal direction of a ground pattern. An antenna device is formed by patterning a metal conductor on a printed substrate. The antenna device is provided with a ground pattern of a rectangular shape, a power feed element arranged adjacent to one short side portion of the ground pattern, a correction pattern that projects from the short side portion and is located lateral to the power feed element, and a parasitic radiation element extending along the short side portion at a separation position facing the short side portion of the ground pattern through the power feed element and the correction pattern. An electrical length of the parasitic radiation element is set to be approximately ½ of a resonant length. When power is feed, the power feed element is excited to radiate electric waves.
REFERENCES:
patent: 6091366 (2000-07-01), Zhang et al.
patent: 6844853 (2005-01-01), Tai et al.
patent: 6977616 (2005-12-01), Yuanzhu
patent: 6985108 (2006-01-01), Mikkola et al.
patent: 7026999 (2006-04-01), Umehara et al.
patent: 7050010 (2006-05-01), Wang et al.
patent: 7170450 (2007-01-01), Chang et al.
patent: 7319432 (2008-01-01), Andersson
patent: 2004/0108957 (2004-06-01), Umehara et al.
patent: 2005/0110692 (2005-05-01), Andersson
patent: 1 271 690 (2003-01-01), None
patent: 1 359 639 (2003-11-01), None
patent: 2003-273639 (2003-09-01), None
patent: 2004-343285 (2004-12-01), None
European Search Report from European Application No. 07023677 dated Aug. 26, 2008.
Alps Electric Co. ,Ltd.
Beyer Law Group LLP
Cho James H.
Lo Christopher
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