Results 21 to 30 of about 7,264,350 (237)

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

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

Improvement in the Electromechanical Properties of a Partially Diced Piezoelectric Disc Transducer

IEEE Access, 2018
Piezoelectric discs vibrating in the thickness mode are widely used in underwater electroacoustic and electromechanical applications. It is well known and established that the first fundamental mode along the thickness of the disc determines the ...
Sairajan Sarangapani, Xiang Yan
doaj   +1 more source

Inversion-based control of electromechanical systems using causal graphical descriptions [PDF]

, 2006
Causal Ordering Graph and Energetic Macroscopic Representation are graphical descriptions to model electromechanical systems using integral causality. Inversion rules have been defined in order to deduce control structure step-bystep from these graphical
F. Giraud, BOUSCAYROL, Alain, GIRAUD, Frédéric, HAUTIER, Jean-Paul, A. Bouscayrol, DELARUE, Philippe, J. P. Hautier, P. Delarue, E. Semail, B. Lemaire-Semail, KESTELYN, Xavier, P. J. Barrre, BARRE, Pierre-Jean, LEMAIRE-SEMAIL, Betty, SEMAIL, Eric, E. Dumetz, X. Kestelyn, DUMETZ, Eric   +17 more
core   +1 more source

Demonstration of Thin Film Bulk Acoustic Resonator Based on AlN/AlScN Composite Film with a Feasible $K_{eff}^2$

Micromachines, 2022
Film bulk acoustic resonators (FBARs) with a desired effective electromechanical coupling coefficient (Keff2) are essential for designing filter devices.
Laixia Nian, Yang Zou, Chao Gao, Yu Zhou, Yuchen Fan, Jian Wang, Wenjuan Liu, Yan Liu, Jeffrey Bowoon Soon, Yao Cai, Chengliang Sun   +10 more
doaj   +1 more source

The Extraction of Coupling-of-Modes Parameters in a Layered Piezoelectric Substrate and Its Application to a Double-Mode SAW Filter

Micromachines, 2023
This paper presents an advanced method that combines coupling-of-modes (COM) theory and the finite element method (FEM), which enables the quick extraction of COM parameters and the accurate prediction of the electroacoustic and temperature behavior of ...
Lingqi Li, Qiaozhen Zhang, Yang Yang, Baichuan Li, Yahui Tian, Xiangyong Zhao, Sulei Fu   +6 more
doaj   +1 more source

FEM Analysis of the Effect of Polarization on the Electromechanical Coupling Factor of Resonators with a Wrap-Around Electrode

, 2022
The efficiency of electromechanical conversion in piezoelectric elements is assessed according to the magnitude of the electromechanical coupling coefficient.
Josef Novák
core   +1 more source

Super-High-Frequency Bulk Acoustic Resonators Based on Aluminum Scandium Nitride for Wideband Applications

Nanomaterials, 2023
Despite the dominance of bulk acoustic wave (BAW) filters in the high-frequency market due to their superior performance and compatible integration process, the advent of the 5G era brings up new challenges to meet the ever-growing demands on high ...
Wentong Dou, Congquan Zhou, Ruidong Qin, Yumeng Yang, Huihui Guo, Zhiqiang Mu, Wenjie Yu   +6 more
doaj   +1 more source

Freestanding Hierarchical-Porous BCZT Thin Films Enable Efficient Ultrasonic Energy Harvesting in Soft Tissue. [PDF]

Adv Sci (Weinh)
Freestanding hierarchical‐porous BCZT thin films integrate a compliant porous surface with a dense piezoceramic backbone to balance mechanical reliability, voltage sensitivity, and acoustic coupling. The films enable stable wearable pulse‐wave monitoring and enhanced tissue‐coupled ultrasonic energy harvesting, offering a promising route toward soft ...
Li Z, Gao S, Hong W, Chen Y, Gu Y, Wang X, Tang C, Hong Y, Li X, Yan X, Zheng Y, Liu Y, Liao J, Wang B, Liu S.   +14 more
europepmc   +2 more sources

Ultrahigh Electromechanical Coupling and Its Thermal Stability in (Na1/2Bi1/2)TiO3-Based Lead-Free Single Crystals

, 2020
In this work, we report the ultrahigh electromechanical coupling performance of NBT-6BT-KNN lead-free single crystal at room temperature. The thickness mode electromechanical coupling coefficient (kt) and the 31 mode electromechanical coupling ...
Xingan Jiang, Xiangping Jiang, Shujun Zhang, Xiaokun Huang, Kaizheng Shu, Xiaoyi Gao, Chao Chen, Li Yang, Na Tu, Haosu Luo   +9 more
core   +3 more sources