14 research outputs found
Modelling and Finite Element Simulation of a Surface Acoustic Wave Driven Linear Motor
No full textAbstractThe paper presents modeling and finite element simulation of a surface acoustic wave (SAW) linear motor. A SAW linear motor works on the principle of friction drive provided by SAW propagating on a piezoelectric stator. The SAW motor comprises of a cubical slider driven by Rayleigh wave generated on a piezoelectric substrate using an interdigital transducer (IDT) fabricated on the stator. In the study, a lithium niobate piezoelectric substrate is used as the stator on which aluminum IDTs are fabricated at the two edges and a cuboid slider is placed in the path of SAW propagation along with a preload. The characteristics such as displacement, velocity and forces acting on the slider for different amplitudes of wave excitations are studied. The slider in the SAW motor can move both in forward and reverse directions and the motor attains a saturated velocity with the continuous wave excitation
Design and Simulation of Nanorod-Based SAW Gas Sensor to detect Hazardous Gases
No full text155-163The work presents the design, a 2D and 3D finite element method (FEM) simulation, analysis, and optimization of a surface
acoustic wave (SAW) based gas sensor. The simulation of SAW gas sensors with and without the presence of nanorods is
performed. Gas adsorption on a surface causes a change in the mass, modulus, and conductivity of the sensing layer, which
can be accurately, detected using SAW-based gas sensors. The device is constructed using a YZ-cut lithium niobate as a
substrate, which is covered by a 0.2 μm thick intermediate layer upon which ZnO nanorods are present operating at 4 μm
wavelength. Simulations in COMSOL Multiphysics are performed using eigen frequency, time-dependent, and frequency
domain analysis. The materials of the intermediate layer as well as interdigitated transducers (IDTs) and the height of the
nanorods are varied for the optimization of the device. The frequency shift and total displacement were seen to be
significantly improved for the nanorod-based SAW gas sensor device
Design and Analysis of One Port SAW Multi-layered Resonator by Reducing Return Loss of the Device
No full text911-917This work comprehensively investigates the design and analysis of one-port multilayer surface acoustic wave (SAW) resonators, focusing on their application in communication systems. The motivation behind this work stems from the increasing demand for high-performance communication systems with minimal signal loss. Return loss, a key parameter in evaluating signal integrity, directly impacts the efficiency and reliability of communication systems. The methodology involves a systematic design process, starting with selecting suitable materials for the multilayer structure based on their acoustic properties and compatibility with communication frequencies. The finite element simulation tool is utilized to model and simulate the SAW resonator's behaviour, allowing for precise optimization of design parameters such as layer thickness, electrode configuration, and interdigital transducer (IDT) design. Various performance metrics, including return loss, bandwidth, and quality factor, are evaluated to assess the effectiveness of the resonator in minimizing signal reflections. The results show significant improvements in return loss reduction, demonstrating the effectiveness of the proposed design approach. This work optimised the height of the electrode and found the insertion loss of the proposed device, which was-27dB. The proposed device demonstrates enhanced performance characteristics suitable for various communication system applications, including wireless networks, radar systems, and satellite communications
Investigating translational motion of a dual friction-drive surface acoustic wave motor through modeling and finite element simulation
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Investigation and optimization for the deflections of micro-cantilever actuator with application to various piezoelectric materials and position of the layer
No full textModelling and finite element simulation of a dual friction-drive SAW motor using flat slider
No full textModelling And Simulations Of Wireless Mobile Multiple Phase Transmission Protocol Using Tandem Queues With BAS Blockings
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