Title:
無線端末装置及びこれに用いるコモンモードフィルタ
Document Type and Number:
Japanese Patent JP5077317
Kind Code:
B2
Abstract:
To provide a radio terminal device which can improve a reception sensitivity of an antenna and can reduce a mounting area of a coil.
The radio terminal device 10 includes: an antenna 13; a radio section 12 and a control section 11 for transmitting and receiving a signal through the antenna 13; an audio line as a low-frequency signal line of 100 MHz or less; a speaker 14 connected to an end of the audio line; and a common mode filter 20 introduced on the audio line. The common mode filter 20 includes a drum core consisting of a non-magnetic ceramic material, and first and second coils wound on a core portion of the drum core. The first and second coils are magnetically coupled with each other.
COPYRIGHT: (C)2011,JPO&INPIT
Inventors:
Tomonari Toshio
Tomokazu Ito
Toshihiro Kuroshima
Tomokazu Ito
Toshihiro Kuroshima
Application Number:
JP2009235634A
Publication Date:
November 21, 2012
Filing Date:
October 09, 2009
Export Citation:
Assignee:
tdk Corporation
International Classes:
H04M1/00; H04M1/725
Domestic Patent References:
| JP2007281639A | ||||
| JP2004146683A | ||||
| JP2008091359A |
Attorney, Agent or Firm:
Mitsuhiro Washito
Ogata Japanese
Yasuyuki Kurose
Takuya Mitani
Ogata Japanese
Yasuyuki Kurose
Takuya Mitani