Title:
HIGH FREQUENCY TRANSFORMER AND PHASE SHIFTER
Document Type and Number:
WIPO Patent Application WO/2018/012400
Kind Code:
A1
Abstract:
This high frequency transformer according to the present invention comprises a primary coil (LI) and a secondary coil (L2) in which the coil winding axes are in a coaxial relationship and are magnetically coupled to each other, a first terminal connected with a first end of the primary coil (L1), a second terminal connected with a first end of the secondary coil (L2), and a common terminal connected to a second end of the primary coil (L1) and a second end of the secondary coil (L2). The primary coil (L1) and the secondary coil (L2) are helical coils including a plurality of looped conductive patterns each formed across the plurality of layers, wherein of the plurality of looped conductive patterns forming the primary coil (L1), first looped conductive patterns closest to the second end of the primary coil (L1) has a larger number of turns than the average number of turns of the other looped conductive patterns included in the primary coil (L1).
Inventors:
UEKI NORIYUKI (JP)
Application Number:
PCT/JP2017/024818
Publication Date:
January 18, 2018
Filing Date:
July 06, 2017
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01F19/00; H01F17/00; H03H7/18
Domestic Patent References:
| WO2015033632A1 | 2015-03-12 | |||
| WO2016114181A1 | 2016-07-21 |
Foreign References:
| JPH06216689A | 1994-08-05 | |||
| JPH04199804A | 1992-07-21 | |||
| JP2002541658A | 2002-12-03 | |||
| JP2012124470A | 2012-06-28 | |||
| JPH0737728A | 1995-02-07 | |||
| JPH0738368A | 1995-02-07 |
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (JP)
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