Antenna apparatus

Communications: radio wave antennas – Antennas – Slot type

Reexamination Certificate

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Details

C343S7000MS, C343S768000

Reexamination Certificate

active

11033382

ABSTRACT:
In order to have an antenna apparatus small in size and capable of switching its directivity pattern without degrading its antenna efficiency, the present invention provides an antenna apparatus having a driven element formed at an approximately center position of a planar printed circuit board and parasitic elements not performing feeding formed before and behind the first antenna element, respectively, so that the driven element is caused to function as a radiator and either one of the parasitic elements is made to have a length as long as an electrical length of a radiator or slightly shorter than that to function as a director and the other one of the parasitic elements is left to have an electrical length longer than that of the radiator to function as a reflector.

REFERENCES:
patent: 3541559 (1970-11-01), Evans
patent: 3623109 (1971-11-01), Neumann
patent: 4631546 (1986-12-01), Dumas et al.
patent: 4812855 (1989-03-01), Coe et al.
patent: 5220335 (1993-06-01), Huang
patent: 6320544 (2001-11-01), Korisch et al.
patent: 6606057 (2003-08-01), Chiang et al.
patent: 6888505 (2005-05-01), Tran
patent: 2002/0105471 (2002-08-01), Kojima et al.
patent: 35-6916 (1935-06-01), None
patent: 53-40733 (1978-04-01), None
patent: 11-027038 (1999-01-01), None
patent: 2000-077929 (2000-03-01), None
patent: 2002-330024 (2002-11-01), None
patent: 2003-142919 (2003-05-01), None
patent: WO 03/058758 (2003-07-01), None
Notification of Reasons for Refusal, Application No. 2004-016186, Drafting date: Aug. 4, 2006.

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