Title:
FILTER AND MULTIPLEXOR
Document Type and Number:
WIPO Patent Application WO/2020/031783
Kind Code:
A1
Abstract:
An additional circuit (20), having IDT electrode groups (201, 202) connected in multiple stages between input/output terminals (T1, T2). The IDT electrode group (201) has IDT electrodes (211, 212) arranged in the direction of propagation of elastic waves, and the IDT electrode group (202) has IDT electrodes (221, 222) arranged in the direction of propagation of elastic waves. One end of the IDT electrode (211) and one end of the IDT electrode (221) are connected to the input/output terminals (T1, T2) respectively. The other ends of the IDT electrodes (211, 221) are commonalized with each other and connected to ground (26). One end of the IDT electrode (212) and one end of the IDT electrode (222) are commonalized with each other, and the other ends of the IDT electrodes (212, 222) are commonalized with each other. The additional circuit (20) is connected in parallel to at least a part of a filter circuit, and forms a filter.
Inventors:
TAKAMINE YUICHI (JP)
Application Number:
PCT/JP2019/029734
Publication Date:
February 13, 2020
Filing Date:
July 30, 2019
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/64; H03H9/72
Foreign References:
| JP2013118611A | 2013-06-13 | |||
| JP2018088678A | 2018-06-07 | |||
| JP2003008390A | 2003-01-10 | |||
| JP2016171446A | 2016-09-23 |
Attorney, Agent or Firm:
YOSHIKAWA, Shuichi et al. (JP)
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