Title:
ELASTIC WAVE ELEMENT, ELASTIC WAVE FILTER DEVICE, AND MULTIPLEXER
Document Type and Number:
WIPO Patent Application WO/2023/282330
Kind Code:
A1
Abstract:
An elastic wave element (10) comprises: a piezoelectric substrate (100); an IDT electrode (11) having a plurality of interdigitated electrode fingers (11a, 11b); and a reflector (12) having a plurality of reflecting electrode fingers (12a). An average value of the pitches of all of the plurality of interdigitated electrode fingers (11a) is smaller than an average value of the pitches of all of the plurality of reflecting electrode fingers (12a). If the total number of the plurality of interdigitated electrode fingers (11a, 11b) is N, the interdigitated electrode finger closest to the reflector (12) is a first end-side electrode finger, the electrode fingers in a direction from the first end-side electrode finger toward the center of the IDT electrode (11) sequentially are an nth end-side electrode finger (n is a natural number), and the pitch between the nth end-side electrode finger and an (n+1)th end-side electrode finger is an nth end-side pitch, at least one nth end-side pitch satisfying expression 1A: 1≦n≦(0.233×N) is smaller than an average value of the pitches of all of the plurality of interdigitated electrode fingers (11a, 11b).
More Like This:
| JPH11298285 | SURFACE ACOUSTIC WAVE ELEMENT |
| JP6819834 | Elastic wave device |
| WO/2022/059586 | ELASTIC WAVE DEVICE |
Inventors:
KONAKA YOHEI (JP)
Application Number:
PCT/JP2022/026984
Publication Date:
January 12, 2023
Filing Date:
July 07, 2022
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/145; H03H9/64; H03H9/72
Domestic Patent References:
| WO2019198594A1 | 2019-10-17 | |||
| WO2018012367A1 | 2018-01-18 |
Foreign References:
| JP2008252678A | 2008-10-16 | |||
| JP2015073207A | 2015-04-16 |
Attorney, Agent or Firm:
YOSHIKAWA, Shuichi et al. (JP)
Download PDF: