期刊
MICROMACHINES
卷 13, 期 5, 页码 -出版社
MDPI
DOI: 10.3390/mi13050779
关键词
MEMS; Lamb-wave resonator; quality factor; transverse mode; reflection boundary
类别
资金
- National Natural Science Foundation of China [62174092, 61804084]
This paper introduces a high quality-factor and spectrum-clean AlN Lamb-wave resonator, which achieves improved Q values and spectral purity through optimized boundary reflection conditions and electrode design.
This paper presents a high quality-factor (Q) and spectrum-clean AlN Lamb-wave resonator (LWR). The width of its lateral reflection boundary was optimized to weaken the transverse modes' coupling and wave guiding, and then to improve the LWR's Q value and spectral purity, which was verified by finite element analysis and experimental characterization. In addition, the series resonance quality factor (Q(s)) value of the interdigitated (IDT)-Ground LWR is similar to that of the IDT-Floating LWR, but its parallel resonance quality factor (Q(p)) is nearly doubled, due to the reduction of the electrical loss induced by its static capacitance (C-0). The measured results show that the designed LWR with optimized boundary reflection conditions and IDT-Ground structure exhibit Q(s) and Q(p) values as high as 4019.8 and 839.5 at 401.2 MHz and 402.9 MHz, respectively, meanwhile, it has good spectral purity. Moreover, the influence of the metal ratio and material of the LWR's IDT electrodes on the device's performance was also studied by theoretical analysis and experimental verification.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据