Title:
ANTENNA DEVICE, AND COMMUNICATION TERMINAL DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/034587
Kind Code:
A1
Abstract:
Provided is a multiband-compatible antenna device such that frequency characteristics can be easily controlled. The antenna device includes: a looped radiating element (11) with a feeding terminal on one end and a ground terminal on the other; and a matching circuit including a first inductance element (L1) loaded at the feeding terminal, and a second inductance element (L2) loaded at the ground terminal and connected to the first inductance element (L1) through a magnetic field. The antenna device is characterized in that the looped radiating element (11) is configured to resonate in a plurality of resonance modes including an even mode and an odd mode, and the first inductance element (L1) and the second inductance element (L2) are wound and connected such that they strengthen the magnetic field with respect to one of the even mode and the odd mode while weakening the magnetic field with respect to the other.
Inventors:
ISHIZUKA KENICHI (JP)
NISHIDA HIROSHI (JP)
NISHIDA HIROSHI (JP)
Application Number:
PCT/JP2013/072673
Publication Date:
March 06, 2014
Filing Date:
August 26, 2013
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01Q1/50; H01P5/08; H01Q7/00; H01Q9/30
Domestic Patent References:
| WO2010104179A1 | 2010-09-16 | |||
| WO2012099085A1 | 2012-07-26 |
Foreign References:
| JP2009206975A | 2009-09-10 |
Other References:
See also references of EP 2741366A4
Download PDF: