Title:
積層型バルントランス
Document Type and Number:
Japanese Patent JP4622003
Kind Code:
B2
Abstract:
A laminated balun transformer that may be applied to the lines having various impedances is provided. The laminated balun transformer includes a magnetic substrate 1, a laminated body 2, a magnetic substrate 3, and external electrodes 4-1 to 4-6. The laminated body 2 includes a first transformer 5, a second transformer 6, and an insulator 7 that covers the first and second transformers 5 and 6 from the outside. The first transformer 5 is formed of a primary coil 5-1 and a secondary coil 5-2. The second transformer 6 is formed of a primary coil 6-1 and a secondary coil 6-2. Then, the line width of the primary coil 5-1 of the first transformer 5 is set so as to decrease from the side of the internal electrode 52a toward the side of the internal electrode 51a. The line width of the secondary coil 6-2 of the second transformer 6 is also set so as to decrease from the side of the internal electrode 62a toward the side of the internal electrode 61a.
Inventors:
Kosuke Ishida
Application Number:
JP2008517803A
Publication Date:
February 02, 2011
Filing Date:
April 19, 2007
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
H01F19/06; H01F17/00; H01F17/04
Domestic Patent References:
| JPH07176918A | 1995-07-14 | |||
| JPH08191016A | 1996-07-23 | |||
| JPH06120428A | 1994-04-28 | |||
| JPH04206905A | 1992-07-28 | |||
| JPH11214943A | 1999-08-06 | |||
| JP2006013063A | 2006-01-12 | |||
| JP2002359507A | 2002-12-13 | |||
| JP2005333011A | 2005-12-02 |
Foreign References:
| WO2006057115A1 | 2006-06-01 | |||
| WO2006123485A1 | 2006-11-23 |
Attorney, Agent or Firm:
Takakazu Tsukahara