Results 11 to 20 of about 22,436 (254)

Influence of Etching Trench on $K_{eff}^2$ of Film Bulk Acoustic Resonator

Micromachines, 2022
As radio-frequency (RF) communication becomes more ubiquitous globally, film bulk acoustic resonators (FBAR) have attracted great attention for their superior performance.
Chao Gao, Yang Zou, Jie Zhou, Yan Liu, Wenjuan Liu, Yao Cai, Chengliang Sun   +6 more
doaj   +1 more source

Analysis on the Radial Vibration of Longitudinally Polarized Radial Composite Tubular Transducer

Sensors, 2020
The radial vibration of a radial composite tubular transducer with a large radiation range and power capacity is studied. The transducer is composed of a longitudinally polarized piezoelectric ceramic tube and a coaxial outer metal tube.
Xiaoyu Wang, Shuyu Lin
doaj   +1 more source

Lead-Free AE Sensor Based on BZT–BCT Ceramics

Sensors, 2021
In this study, an acoustic emission (AE) sensor was fabricated using lead-free Ba(Zr0.2Ti0.8)O3–0.5(Ba0.7Ca0.3)TiO3 (BZT–BCT) ceramics. The acoustic and electromechanical properties of the AE sensor were determined by the shapes of the piezoelectric ...
Dong-Jin Shin, Woo-Seok Kang, Dong-Hwan Lim, Bo-Kun Koo, Min-Soo Kim, Soon-Jong Jeong, In-Sung Kim   +6 more
doaj   +1 more source

Structure-Size Optimization and Fabrication of 3.7 GHz Film Bulk Acoustic Resonator Based on AlN Thin Film

Frontiers in Materials, 2021
Traditional radio frequency filters cannot meet the demands of miniaturization, high frequency operation, integration, and broadband capacity in new-generation communication system owing to their larger volumes. A thin film bulk acoustic resonator (FBAR)
Pingying Jiang, Shiping Mao, Zaifang An, Chunlong Fei, Lifei Lou, Zhaoxi Li, Tianlong Zhao, Shiyi Jiang, Yintang Yang   +8 more
doaj   +1 more source

An equivalent dipole analysis of PZT ceramics and lead-free piezoelectric single crystals [PDF]

Journal of Advanced Dielectrics, 2016
The recently proposed Equivalent Dipole Model for describing the electromechanical properties of ionic solids in terms of 3 ions and 2 bonds has been applied to PZT ceramics and lead-free single crystal piezoelectric materials, providing analysis in ...
Andrew J. Bell
doaj   +1 more source

Design and Analysis of Lithium–Niobate-Based Laterally Excited Bulk Acoustic Wave Resonator with Pentagon Spiral Electrodes

Micromachines, 2023
In this paper, we present a comprehensive study on the propagation and dispersion characteristics of A1 mode propagating in Z-cut LiNbO3 membrane. The A1 mode resonators with pentagon spiral electrodes utilizing Z-cut lithium niobate (LiNbO3) thin film ...
Ying Xie, Wenjuan Liu, Yao Cai, Zhiwei Wen, Tiancheng Luo, Yan Liu, Chengliang Sun   +6 more
doaj   +1 more source

Design and 3D FEM Analysis of a Flexible Piezoelectric Micromechanical Ultrasonic Transducer Based on Sc-Doped AlN Film

Sensors, 2022
In this paper, a flexible piezoelectric micromachined ultrasonic transducer (PMUT) based on Scandium (Sc)-doped Aluminum Nitride (AlN) film was designed and modeled by the three-dimensional finite element method (3D-FEM).
Qinghua Ren, Junhong Chen, Xin Liu, Songsong Zhang, Yuandong Gu   +4 more
doaj   +1 more source

Theoretical modelling of frequency dependent elastic loss in composite piezoelectric transducers [PDF]

, 2007
The large number of degrees of freedom in the design of piezoelectric transducers requires a theoretical model that is computationally efficient so that a large number of iterations can be performed in the design optimisation.
Hayward, G., Mulholland, A.J., O'Leary, R.L., Orr, L., Parr, A.C.S., Pethrick, R.A.   +5 more
core   +1 more source

Discussion on `Characterization of 1-3 piezoelectric polymer composites - a numerical and analytical evaluation procedure for thickness mode vibrations' by C.V. Madhusudhana Rao, G. Prasad, Condens. Matter Phys., 2010, Vol.13, No.1, 13703 [PDF]

, 2014
In the paper entitled "Characterization of 1-3 piezoelectric polymer composites - a numerical and analytical evaluation procedure for thickness mode vibrations", the dependence of the thickness electromechanical coupling coefficient on the aspect ratio ...
Li, Z., Sun, Y.
core   +2 more sources

Effect of the Matching Circuit on the Electromechanical Characteristics of Sandwiched Piezoelectric Transducers

Sensors, 2017
The input electrical impedance behaves as a capacitive when a piezoelectric transducer is excited near its resonance frequency. In order to increase the energy transmission efficiency, a series or parallel inductor should be used to compensate the ...
Shuyu Lin, Jie Xu
doaj   +1 more source