ANTENNA DEVICE AND COMMUNICATION TERMINAL APPARATUS

Title:

ANTENNA DEVICE AND COMMUNICATION TERMINAL APPARATUS

Document Type and Number:

WIPO Patent Application WO/2011/090080

Kind Code:

A1

Abstract:

An antenna device (106) is provided with an antenna element (11), and an impedance conversion circuit (25) connected to the antenna element (11). The impedance conversion circuit (25) is connected to the feeding end of the antenna element (11). The impedance conversion circuit (25) is inserted between the antenna element (11) and a feeding circuit (30). The impedance conversion circuit (25) is provided with a first inductance element (L1) connected to the feeding circuit (30), and a second inductance element (L2) coupled to the first inductance element (L1). A first end of the first inductance element (L1) is connected to the feeding circuit (30), a second end thereof is connected to the antenna, a first end of the second inductance element (L2) is connected to the antenna element (11), and a second end thereof is connected to a ground.

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Inventors:

KATO NOBORU (JP)
ISHIZUKA KENICHI (JP)

Application Number:

PCT/JP2011/050884

Publication Date:

July 28, 2011

Filing Date:

January 19, 2011

Export Citation:

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Assignee:

MURATA MANUFACTURING CO (JP)
KATO NOBORU (JP)
ISHIZUKA KENICHI (JP)

International Classes:

H01Q1/50; H01P1/00; H01P5/08; H01P5/10; H01Q1/24; H04B1/3822; H04B1/40

Foreign References:

JP2000244273A	2000-09-08
JP2004304615A	2004-10-28
JP2009246624A	2009-10-22
JP2005323132A	2005-11-17
JP2004336250A	2004-11-25
JP2006173697A	2006-06-29
JP2000124728A	2000-04-28
JP2008035065A	2008-02-14

Other References: