Ultra Wide Acoustic Bandgap Detection in Novel Octagonal Phononic Crystal of MEMS Materials

Zafar, Lubna Razia; Huang, Jianguo; Khan, Muhammad Asif

doi:10.1109/icet49382.2020.9119622

Cited by 1 publication

(1 citation statement)

References 25 publications

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“…Pandey et al designed a mesa around the resonator to reflect the elastic energy back to the resonator [ 18 ]. Using the band gap characteristics of phononic crystals (PCs) to suppress the anchor loss has attracted the attention of researchers [ 3 , 11 , 15 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 ]. For example, Zhu et al used a two-dimensional stomatal PCs unit cell to increase the Q to twice the original [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

H-Shaped Radial Phononic Crystal for High-Quality Factor on Lamb Wave Resonators

Tong

et al. 2023

Sensors

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In this paper, a novel H-shaped radial phononic crystal (H-RPC) structure is proposed to suppress the anchor loss of a Lamb wave resonator (LWR), which has an ultra-high frequency (UHF) and ultra-wideband gap characteristics. Compared to previous studies on phononic crystal (PC) structures aimed at suppressing anchor loss, the radial phononic crystal (RPC) structure is more suitable for suppressing the anchor loss of the LWR. By using the finite element method, through the research and analysis of the complex energy band and frequency response, it is found that the elastic wave can generate an ultra-wideband gap with a relative bandwidth of up to 80.2% in the UHF range when propagating in the H-RPC structure. Furthermore, the influence of geometric parameters on the ultra-wideband gap is analyzed. Then, the H-RPC structure is introduced into the LWR. Through the analysis of the resonant frequency, it is found that the LWR formed by the H-RPC structure can effectively reduce the vibration energy radiated by the anchor point. The anchor quality factor was increased by 505,560.4% compared with the conventional LWR. In addition, the analysis of the LWR under load shows that the LWR with the H-RPC structure can increase the load quality factor by 249.9% and reduce the insertion loss by 93.1%, while the electromechanical coupling coefficient is less affected.

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Section: Introductionmentioning

confidence: 99%

H-Shaped Radial Phononic Crystal for High-Quality Factor on Lamb Wave Resonators

Tong

et al. 2023

Sensors

View full text Add to dashboard Cite

show abstract

Ultra Wide Acoustic Bandgap Detection in Novel Octagonal Phononic Crystal of MEMS Materials

Cited by 1 publication

References 25 publications

H-Shaped Radial Phononic Crystal for High-Quality Factor on Lamb Wave Resonators

H-Shaped Radial Phononic Crystal for High-Quality Factor on Lamb Wave Resonators

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