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FEM (Finite Element Method) modelling software such as COMSOL Multiphysics® can be a powerful tool for modelling the behavior and response of piezoelectric materials and devices [1]. Devices based on piezoelectric crystals are particularly well suited, because the polarization magnitude ... Mehr lesen
In this paper, we present study on the mass loading effect of the interdigital transducer (IDT) on surface acoustic wave (SAW) velocity in SAW devices, using COMSOL Multiphysics. We have simulated a one port SAW resonator made on YZ lithium niobate substrate and investigated the ... Mehr lesen
Surface acoustic wave (SAW) devices are widely used for their sensing capabilities and gas sensing is only one of many uses. There is an ever increasing need to make them as effective as possible by adding nanomaterials to the device. In this study a two-port delay-line structure with ... Mehr lesen
Introduction - The ability to precisely manipulate fluid and particles at microscales is one of the essential requirements for various lab-on-a-chip applications such as drug diagnostics, chemical synthesis etc.[1] Recently, the nonlinear interaction of surface acoustic waves (SAW) with ... Mehr lesen
在对以聚二甲基硅烷（PDMS）为腔道材料的声表面波（SAW）微流控器件建模时，通常采用简化模型来描述PDMS的声学特性。本文以声表面驻波（SSAW）微流控芯片为例，通过三种不同的方式对PDMS腔体建模，利用有限元方法分析了腔体内部的物理场和腔体内粒子的运动过程。对PDMS腔体建模时，分别采用COMSOL中的固体力学、压力声学和声阻抗边界三种方式分析PDMS腔体对微流腔内声场和流场的影响。从结果中我们发现，PDMS中的横波并不会显著影响腔体内的声场和声辐射力场，但会对声流产生较为明显的影响，进而影响受声场和流场作用的粒子运动轨迹 ... Mehr lesen
Despite of the existing successful clinical applications, however, the interaction, i.e. artificial sensing, between the robot and the patient is still very limited. With the help of various cameras, vision is almost the only feeling that a robot can have. In order to imitate the human ... Mehr lesen
3D model of MEMS based SAW gas sensor is designed using Focused Inter Digital Transducers design. Surface displacement & Electrical potential are analyzed at resonance & anti-resonance frequencies. Operating frequency is from 8.7 MHz which acts as start band and 9.2 MHz as stop ... Mehr lesen
We have modeled surface acoustic wave (SAW) devices composed of piezoelectric materials: aluminum nitride (AlN), lithium niobate (LiNbO3), and quartz. These materials are often used in RF filters and wireless sensors, which require temperature compensation for stability. Using our COMSOL ... Mehr lesen
It is common knowledge to readers of these COMSOL conference proceedings that COMSOL (as well as other established CFD codes) produces unstable numerical solutions of the Navier-Stokes equations without "consistent stabilization" and/or "inconsistent stabilization" (or similar ... Mehr lesen
The paper presents a method of extraction of electrical equivalent circuit of a one port surface acoustic wave (SAW) resonator from the results of simulation based on finite element method (FEM) using COMSOL Multiphysics software. A one port SAW resonator consists of large number of ... Mehr lesen