A surface acoustic wave resonator and electronic device
By setting protrusions in the inner busbars of the interdigital transducer to form a sawtooth structure, the problem of Q-value reduction caused by transverse modes in the surface acoustic wave filter is solved, and transverse mode suppression and Q-value improvement are achieved.
CN224401501UActive Publication Date: 2026-06-23EPIC MEMS XIAMEN CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- EPIC MEMS XIAMEN CO LTD
- Filing Date
- 2025-06-13
- Publication Date
- 2026-06-23
AI Technical Summary
Technical Problem
Traditional surface acoustic wave filters generate transverse modes during sound wave propagation, leading to a decrease in Q value.
Method used
A first protrusion is provided in the inner busbar of the interdigital transducer to form an inner edge sound velocity zone. A sawtooth structure is formed by multiple first protrusions, which causes diffuse reflection of sound waves during transverse propagation and suppresses the generation of transverse modes.
Benefits of technology
It effectively suppresses the generation of transverse modes and improves the Q value of surface acoustic wave devices.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN224401501U_ABST
Abstract
This application discloses a surface acoustic wave (SAW) resonator and electronic device, applicable to the field of SAW technology. The interdigital transducer includes two outer busbars and at least two inner busbars arranged opposite each other. The inner busbars are disposed between the outer busbars, and both the outer and inner busbars are parallel to the length direction. Each inner busbar has multiple first protrusions extending along its width direction and along its length direction to form an inner edge sound velocity region on at least one side of the inner busbar. The sound velocity in the inner edge sound velocity region is lower than that in the inner layer sound velocity region. The sawtooth structure formed by the multiple first protrusions causes diffuse reflection of sound waves during transverse propagation, thereby reducing the Q value of transverse clutter modes and effectively suppressing the generation of transverse modes.
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