A Novel Structure to Suppress Transverse Modes in Radio Frequency TC-SAW Resonators and Filters

Wang, Kun; Liu, Jiansong; Wang, Yiliu; Lam, C.S.

doi:10.1109/lmwc.2019.2898730

Cited by 39 publications

(13 citation statements)

References 9 publications

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“…• Sensible to temperature variations • Radiation loss in fluid • Weak structure settings. [27] In fact, with their highly tunable frequencies ranging from several hundred MHz to GHz, SAW devices had been found in numerous applications such as filters, [28][29][30][31] resonators, [28,[32][33][34] radio frequency identification, [35][36][37] and in biosensors. [38][39][40] Biosensors relying on SAW technology are highly sensitive and accurate while the current manufacturing processes had permitted the assembly of portable and inexpensive devices with excellent aging characteristics.…”

Section: Lamb Wavesmentioning

confidence: 99%

“…A modern SAW device typically uses interdigital transducers (IDTs) to produce and record changes to acoustic wave on the piezoelectric substrate [ 26 ] and therefore the responsiveness of the piezoelectric material is an important factor when selecting for the most suitable sensors under different applications settings. [ 27 ] In fact, with their highly tunable frequencies ranging from several hundred MHz to GHz, SAW devices had been found in numerous applications such as filters, [ 28–31 ] resonators, [ 28,32–34 ] radio frequency identification, [ 35–37 ] and in biosensors. [ 38–40 ] Biosensors relying on SAW technology are highly sensitive and accurate while the current manufacturing processes had permitted the assembly of portable and inexpensive devices with excellent aging characteristics.…”

Section: Introductionmentioning

confidence: 99%

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Current Trends on Surface Acoustic Wave Biosensors

Zida

Lin

Khung

2021

Adv Materials Technologies

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The development of rapid biosensing platforms is an integral part for the detection of many diseases, as well as important clinical biomarkers. So far, many new biosensing technologies have been described in literature but many of these novel platforms remain noncommercializable due to challenges in fabrication process, operational conditions as well as other cost concerns. Hence, there is a need to develop efficient and cost‐effective biosensing platforms and of the types available from literature, surface acoustic wave (SAW) biosensors have certain standout attributes. The simple manufacturing requirements of SAW‐based biosensor and its wide operating frequency range have produced promising outcome for bio‐detection and this has rendered this technological platform as a serious contender for point‐of‐care biosensor design. So far, SAW devices are reported for the detection of various bioactive targets of clinical importance and several designs are already commercialized. In this review, the latest development of SAW technologies in recent years for the detection of a broad range of biomolecules is presented and some of the challenges as well as potential future developments of SAW biosensors are highlighted.

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Section: Lamb Wavesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Current Trends on Surface Acoustic Wave Biosensors

Zida

Lin

Khung

2021

Adv Materials Technologies

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“…This operating frequency is almost more than 100 times higher than that of bulk waves in QCM. SAW devices have significant advantages in electronic devices, in terms of miniature size, low cost, ease of manufacture, and all electrical readout, which makes them suitable for applications, such as resonators [218]; filters [219,220]; radio frequency identification [221]; chemical sensors [222][223][224][225][226]; pressure sensors [227,228]; temperature sensors [229][230][231]; strain sensors [232]; and biosensors [40,233,234]. The first reported SAW-based sensor was in 1979, which was used for chemical gas sensing using both quartz and LiNbO3 substrates [235].…”

Section: Surface Acoustic Wave Biosensorsmentioning

confidence: 99%

Acoustic Biosensors and Microfluidic Devices in the Decennium: Principles and Applications

Nair

Teo

2021

Micromachines

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Lab-on-a-chip (LOC) technology has gained primary attention in the past decade, where label-free biosensors and microfluidic actuation platforms are integrated to realize such LOC devices. Among the multitude of technologies that enables the successful integration of these two features, the piezoelectric acoustic wave method is best suited for handling biological samples due to biocompatibility, label-free and non-invasive properties. In this review paper, we present a study on the use of acoustic waves generated by piezoelectric materials in the area of label-free biosensors and microfluidic actuation towards the realization of LOC and POC devices. The categorization of acoustic wave technology into the bulk acoustic wave and surface acoustic wave has been considered with the inclusion of biological sample sensing and manipulation applications. This paper presents an approach with a comprehensive study on the fundamental operating principles of acoustic waves in biosensing and microfluidic actuation, acoustic wave modes suitable for sensing and actuation, piezoelectric materials used for acoustic wave generation, fabrication methods, and challenges in the use of acoustic wave modes in biosensing. Recent developments in the past decade, in various sensing potentialities of acoustic waves in a myriad of applications, including sensing of proteins, disease biomarkers, DNA, pathogenic microorganisms, acoustofluidic manipulation, and the sorting of biological samples such as cells, have been given primary focus. An insight into the future perspectives of real-time, label-free, and portable LOC devices utilizing acoustic waves is also presented. The developments in the field of thin-film piezoelectric materials, with the possibility of integrating sensing and actuation on a single platform utilizing the reversible property of smart piezoelectric materials, provide a step forward in the realization of monolithic integrated LOC and POC devices. Finally, the present paper highlights the key benefits and challenges in terms of commercialization, in the field of acoustic wave-based biosensors and actuation platforms.

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“…With the coming of the 5G era, SAW devices have gradually become stringent requirements on RF devices [ 1 , 2 ]. It promotes the emergence of a large number of new-type SAW devices, such as temperature compensated SAW (TC-SAW) devices [ 3 , 4 , 5 ], incredible high-performance SAW (I.H.P. SAW) devices [ 6 , 7 , 8 , 9 ], and laterally-excited bulk-wave resonators (XBARs) [ 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Hybrid Full-Wave Analysis of Surface Acoustic Wave Devices for Accuracy and Fast Performance Prediction

Chen

Zhang

et al. 2020

Micromachines

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In this paper, a hybrid full-wave analysis of surface acoustic wave (SAW) devices is proposed to achieve accurate and fast simulation. The partial differential equation (PDE) models of the physical system in question and graphics processing unit (GPU)-assisted hierarchical cascading technology (HCT) are used to calculate acoustic-electric characteristics of a SAW filter. The practical solid model of the radio frequency (RF) filter package is constructed in High Frequency Structure Simulator (HFSS) software and the parasitic electromagnetics of the entire package is considered in the design process. The PDE-based models of the two-dimensional finite element method (2D-FEM) are derived in detail and solved by the PDE module embedded in COMSOL Multiphysics. Due to the advantages of PDE-based 2D-FEM, it is universal, efficient and not restricted to handling arbitrary materials and crystal cuts, electrode shapes, and multi-layered substrate. Combining COMSOL Multiphysics with a user-friendly interface, a flexible way of modeling and mesh generation, it can greatly reduce the complicated process of modeling and physical properties definition. Based on a hybrid full-wave analysis, we present an example application of this approach on a TC-SAW ladder filter with 5° YX-cut LiNbO3 substrate. Numerical results and measurements were calculated for comparison, and the accuracy and efficiency of the proposed method were verified.

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A Novel Structure to Suppress Transverse Modes in Radio Frequency TC-SAW Resonators and Filters

Cited by 39 publications

References 9 publications

Current Trends on Surface Acoustic Wave Biosensors

Current Trends on Surface Acoustic Wave Biosensors

Acoustic Biosensors and Microfluidic Devices in the Decennium: Principles and Applications

Hybrid Full-Wave Analysis of Surface Acoustic Wave Devices for Accuracy and Fast Performance Prediction

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