Bai Jin, Li Lixia, Chai Chenyang
School of Mechanical and Electrical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
Sensors (Basel). 2024 Aug 28;24(17):5584. doi: 10.3390/s24175584.
This article introduces a novel petal-like SAW topology insulator, which can transmit sound waves with low loss and high flexibility in an ultra-wide frequency band by simultaneously adjusting multiple structural parameters of phononic crystals. Using finite element analysis, it was found that adjusting these parameters can generate a broadband gap of 55.8-65.7 MHz. This structure can also achieve defect immunity and sharp bending in waveguide transmission. When this topology insulator is applied to resonators, compared to traditional designs, the insertion loss is reduced by 22 dB, the on-load quality factor is increased by 227%, the off-load quality factor is increased by 1024.5%, and the quality sensitivity is improved by 3.7 times compared to bare devices.
本文介绍了一种新型花瓣状声表面波拓扑绝缘体，通过同时调整声子晶体的多个结构参数，可在超宽频带内以低损耗和高灵活性传输声波。利用有限元分析发现，调整这些参数可产生55.8 - 65.7 MHz的宽带隙。这种结构在波导传输中还能实现缺陷免疫和急剧弯曲。当这种拓扑绝缘体应用于谐振器时，与传统设计相比，插入损耗降低了22 dB，负载品质因数提高了227%，空载品质因数提高了1024.5%，品质灵敏度比裸器件提高了3.7倍。
