Title:
DEMULTIPLEXING DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/056377
Kind Code:
A1
Abstract:
Provided is a demultiplexing device that separates signals of a plurality of passbands, wherein damping characteristics and isolation characteristics outside of the passbands are improved. The demultiplexing device (1) comprises: a duplexer (100) having a transmission filter unit (110) and a reception filter unit (120) connected to an antenna terminal (T1); and a filter (200) connected to the antenna terminal (T1). An inductor (L1) is connected between the antenna terminal (T1) and a ground potential. Transmission filter units (110, 210) are ladder-type filters that include a plurality of series arm resonators and a plurality of parallel arm resonators, and respectively include polarized inductors (L12, L22) connected between the plurality of parallel arm resonators and the ground potential. The inductor (L1) and polarized inductors (L12, L22) are inductively coupled to each other, and the distance between the inductor (L1) and the polarized inductors (L12, L22) is shorter than the distance between the polarized inductors (L12, L22).
Inventors:
MUKAI TAKAO (JP)
Application Number:
PCT/JP2015/076607
Publication Date:
April 14, 2016
Filing Date:
September 18, 2015
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/64; H03H9/72
Domestic Patent References:
| WO2010067497A1 | 2010-06-17 | |||
| WO2007102560A1 | 2007-09-13 | |||
| WO2014034373A1 | 2014-03-06 |
Attorney, Agent or Firm:
Fukami Patent Office, p. c. (JP)
Patent business corporation Fukami patent firm (JP)
Patent business corporation Fukami patent firm (JP)
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