Communications: radio wave antennas – Antennas – Microstrip
Reexamination Certificate
2005-02-01
2010-06-22
Chen, Shih-Chao (Department: 2821)
Communications: radio wave antennas
Antennas
Microstrip
C343S702000, C343S876000
Reexamination Certificate
active
07741998
ABSTRACT:
An antenna device for a portable radio communication device operable in at least a first and a second frequency band, includes first and second electrically conductive planar radiating elements. The first radiating element has a feeding portion connectable to a feed device of the portable radio communication device. The second radiating element includes a grounding portion connectable to ground. A controllable switch is arranged between the first and second radiating elements for selectively interconnecting and disconnecting the radiating elements. The state of the switch is controlled by means of a control voltage input. A first filter is arranged between the feeding portion and the control voltage input, to block radio frequency signals. By providing a high pass filter between the first and second radiating elements above a ground plane, quad-band operation is provided with high efficiency in a physically small antenna device.
REFERENCES:
patent: 6417813 (2002-07-01), Durham
patent: 6930639 (2005-08-01), Bauregger et al.
patent: 7057472 (2006-06-01), Fukamachi et al.
patent: 2008/0224942 (2008-09-01), von Arbin
patent: 1 237 222 (2002-09-01), None
patent: 1 361 623 (2003-11-01), None
patent: 1714351 (2009-04-01), None
patent: 2 335 798 (1998-03-01), None
patent: 11298231 (1999-10-01), None
patent: 2000236209 (2000-08-01), None
patent: WO 01/20718 (2001-03-01), None
May 21, 2007: EP Communication pursuant to Article 96(2).
Chen Shih-Chao
Harness & Dickey & Pierce P.L.C.
Laird Technologies AB
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