Title:
HIGH FREQUENCY FRONT END CIRCUIT AND COMMUNICATION DEVICE
Document Type and Number:
Japanese Patent JP2018093475
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a high frequency front end circuit capable improving attenuation characteristics and pass characteristics.SOLUTION: A high frequency front end circuit 2X includes a multiplexer 14X constituted of multiple filters 11a, 11b including the filter 11a, having one ends in common connection and pass-bands different from each other, a filter 13a having a passband in the passband of the filter 11a, and a switch 21a having a common terminal connected with the other terminal of the filter 11a, and a selection terminal connected with the filter 13a. An elastic wave resonator arranged closest to a switch 21a side, out of one or more elastic wave resonators constituting the filter 11a, and an elastic wave resonator arranged closest to a switch 21a side, out of one or more elastic wave resonators constituting the filter 13a, are series arm resonators.SELECTED DRAWING: Figure 1
Inventors:
TAKEUCHI TAKEHISA
Application Number:
JP2017177224A
Publication Date:
June 14, 2018
Filing Date:
September 15, 2017
Export Citation:
Assignee:
MURATA MANUFACTURING CO
International Classes:
H04B1/00; H03H7/46; H03H9/17; H03H9/54; H03H9/64; H03H9/70; H03H9/72; H04B1/405
Domestic Patent References:
| JP2014523203A | 2014-09-08 | |||
| JP2015201808A | 2015-11-12 | |||
| JP2015528237A | 2015-09-24 | |||
| JP2014521248A | 2014-08-25 | |||
| JP2014140115A | 2014-07-31 | |||
| JP2008085989A | 2008-04-10 | |||
| JP2015115866A | 2015-06-22 |
Attorney, Agent or Firm:
Shuichi Yoshikawa
Masao Sakajima
Masao Sakajima