Title:
弾性波フィルタ、分波器および通信装置
Document Type and Number:
Japanese Patent JP7213747
Kind Code:
B2
Abstract:
To provide an acoustic wave filter that can be reduced in size.SOLUTION: An acoustic wave filter F1 comprises: a piezoelectric substrate 3; and a resonator 1 that includes a plurality of electrode fingers 15 constituting a serial arm of a filter on the piezoelectric substrate 3, the resonator 1 including a first resonance part 23, a second resonance part 25 and a third resonance part 27 that are longitudinally coupled to the first resonance part 23 on both sides in a propagation direction of an elastic wave of the first resonance part 23 and different in frequency design from the first resonance part 23, and a pair of reflectors 9 that are located on both sides of the row of the first resonance part 23, the second resonance part 25, and the third resonance part 27.SELECTED DRAWING: Figure 2
Inventors:
Go Nakai
Application Number:
JP2019084365A
Publication Date:
January 27, 2023
Filing Date:
April 25, 2019
Export Citation:
Assignee:
Kyocera Corporation
International Classes:
H03H9/145; H03H9/64
Domestic Patent References:
| JP2000049558A | ||||
| JP2001230657A | ||||
| JP2016054393A |
Foreign References:
| WO2017208629A1 |
Attorney, Agent or Firm:
Yasuhiro Iijima
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