Title:
積層型バルントランス
Document Type and Number:
Japanese Patent JP4470191
Kind Code:
B2
Abstract:
An object is to provide a laminated balun transformer that can achieve improved balance characteristics and suppress occurrence of parasitic inductance. The laminated balun transformer is a transformer that has an impedance transformation ratio of one to four and outputs balanced signals generated fromanunbalancedsignal. The laminated balun transformer includes a magnetic substrate 1, a laminated body 2, and external electrodes 4-1 to 4-6. Thelaminatedbody2includes a first transformer 5, a second transformer 6, and a nonmagnetic body 7 which completely covers the first and second transformers 5 and 6 from the outside. The first and second transformers 5 and 6 are arranged side by side in a direction substantially parallel to the magnetic substrate 1. A primary coil 5-1 of the first transformer 5 and a secondary coil 6-2 of the second transformer 6 are configured to be 180-degree rotationally symmetric with respect to a center line L, while a secondary coil 5-2 and a primary coil 6-1 are also configured to be 180-degree rotationally symmetric with respect to the center line L.
Inventors:
Yasuhiro Fujiki
Katsuji Matsuda
Kosuke Ishida
Katsuji Matsuda
Kosuke Ishida
Application Number:
JP2007516223A
Publication Date:
June 02, 2010
Filing Date:
April 06, 2006
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
H01F19/06; H01F17/00; H01F27/29
Domestic Patent References:
| JP2002359507A | ||||
| JP11054336A | ||||
| JP9139315A | ||||
| JP2005509300A |
Attorney, Agent or Firm:
Takakazu Tsukahara