Resonance Spectrum Characteristics of Effective Electromechanical Coupling Coefficient of High-Overtone Bulk Acoustic Resonator [PDF]
Micromachines, 2016 A high-overtone bulk acoustic resonator (HBAR) consisting of a piezoelectric film with two electrodes on a substrate exhibits a high quality factor (Q) and multi-mode resonance spectrum. By analyzing the influences of each layer’s material and structure (
Jian Li, Mengwei Liu, Chenghao Wang
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Aluminum Nitride-Based Adjustable Effective Electromechanical Coupling Coefficient Film Bulk Acoustic Resonator [PDF]
Micromachines, 2023 The arrival of the 5G era has promoted the need for filters of different bandwidths. Thin-film bulk acoustic resonators have become the mainstream product for applications due to their excellent performance.
Yuanhang Qu +9 more
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Aspect ratio dependence of the effective electromechanical coupling coefficient Ke of the transverse vibration mode for a piezoelectric rectangular thin plate [PDF]
AIP Advances, 2019 In this paper, the apparent elasticity method is used to derive the transverse effective electromechanical coupling coefficient Ke of a piezoelectric rectangular thin plate with an arbitrary aspect ratio G (defined as the ratio of the two transverse ...
Bocheng Ji +4 more
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Mechanisms of Concentric Ring Electrodes in Tuning the Performance of Z-Cut Lithium Niobate Ultrasonic Transducers [PDF]
SensorsZ-cut lithium niobate single crystal demonstrates considerable promise for contact-based ultrasonic nondestructive testing and structural health monitoring (SHM) transducers due to its high piezoelectric coefficients, strong electromechanical coupling ...
Xuesheng Ouyang +10 more
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High-Performance and Thermally Robust A1-Mode Lamb Wave Resonators on Bonded LiNbO3/SiC Membranes [PDF]
MicromachinesIn radiofrequency filters, there is an increasing demand for high-frequency, wide-bandwidth operation. Recently, laterally excited A1-mode Lamb wave resonators (XBARs) have attracted significant attention; however, freestanding structures are ...
Noriyuki Watanabe +4 more
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Enhancing film bulk acoustic resonators performance by optimizing AlN seed layer crystallinity and polarity alignment [PDF]
Nature CommunicationsThe demand for high-performance filters in next-generation wireless communication systems underscores the limited electromechanical coupling of aluminum nitride-based film bulk acoustic resonators.
Tingting Yang +15 more
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Enhanced electromechanical coupling in piezoelectric MEMS vibration energy harvesters via strain-induced phase transition in Mn-doped bismuth ferrite epitaxial films [PDF]
Microsystems & NanoengineeringMn-doped BiFeO3 (BFMO) epitaxial films grown on (100) Si wafers delivered enhanced electrical and piezoelectric properties under systematically optimized growth conditions, realized through a biaxial combinatorial sputtering method.
Sengsavang Aphayvong +7 more
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Study on Vibration Characteristics of Functionally Graded Material Composite Spherical Piezoelectric Transducer [PDF]
SensorsNon-uniform composite structures for transducers exhibit considerable potential in enhancing impedance matching and efficiency. Here, a functionally graded material composite spherical piezoelectric transducer (FGM-cSPT) is proposed, and a three-port ...
Sha Wang, Junjie Shan
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Archives of Acoustics, 2014 In this paper the purpose and manner of conducting the process of asymptotic homogenization of a type 1-3 composite structure are presented. The formulation of the homogenization process is reduced to numerical static analysis of an elementary symmetry ...
K. KYCIA, A. NOWICKI, O. GAJL, T.D. HIEN
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Applied Sciences, 2023 In this study, we propose a fast calculation method that utilizes Kirchhoff’s hypotheses and electroelasticity theory to derive the resonant frequency, antiresonant frequency, and effective electromechanical coupling coefficient of a trilaminar bending ...
Chenhui Zhu +4 more
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