Title:
ANTENNA FOR A FOLDABLE RADIO DEVICE
Document Type and Number:
WIPO Patent Application WO2004109848
Kind Code:
B1
Abstract:
An antenna intended for a foldable radio device, and a radio device with such an antenna. The first turning part (TP1) of the radio device includes the radio frequency transmitting and receiving amplifiers of the device, an antenna port (AP) and a first antenna element (320), by which the device has a signaling connection with the base stations of the radio network when the device is closed. The back part of the cover of the second turning part (TP2) or at least its surface is conductive. When the device is turned into the open position, the electromagnetic coupling between the conductive part of the outer cover (330) and said antenna element is strengthened so that the conductive part of the outer cover begins to function as a planar radiator at least in one of the operating bands of the device. In that case, the first antenna element functions as a feeding element for the radiator (331) formed by the conductive part of the outer cover. A better quality radio connection is achieved in the radio device during the actual network connection, compared to corresponding prior art radio devices, because the radiating surface is relatively large and is located on the outer cover of the device. The quality of the radio connection is achieved without needing to draw an antenna cable through the hinge between the turning part of the device.
Inventors:
ANNAMAA PETTERI (FI)
Application Number:
PCT/FI2004/000342
Publication Date:
March 17, 2005
Filing Date:
June 04, 2004
Export Citation:
Assignee:
FILTRONIC LK OY (FI)
ANNAMAA PETTERI (FI)
ANNAMAA PETTERI (FI)
International Classes:
H01Q1/24; H01Q5/00; H01Q9/04; (IPC1-7): H01Q1/24
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