Use of Hierarchical Cascading Technique for FEM Analysis of Transverse-Mode Behaviors in Surface Acoustic-Wave Devices

Bao, Jingfu; Huang, Yulin; Zhang, Benfeng; Omori, Tatsuya; Hashimoto, Ken–ya

doi:10.1109/tuffc.2019.2932105

Cited by 31 publications

(13 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…HCT can be also applied to 3D FEM, and demonstrated full 3D FEM analysis of practical SAW device structures [46], [47]. The authors also showed that combination of HCT with high-end general-purpose graphic-processor unit (GPGPU) makes 3D FEM simulation possible for practical SAW device structures [47], [48]. Nevertheless, applicability of full 3D is limited to relatively simple cases due to the memory size embedded in GPGPU.…”

Section: Advanced Fem Simulationmentioning

confidence: 99%

“…HCT is also a new theoretical tool for researchers to tackle various problems on SAW/BAW excitation and scattering including those believed to be impossible. An example is SAW scattering analysis at irregularity inserted in between two semi-infinitely long gratings [44] and that at IDT finger tips [48]. To the best of the authors' knowledge, such kinds of analysis have never been accomplished and reported before.…”

Section: Advanced Fem Simulationmentioning

confidence: 99%

“…Note that S 1− mode is the backward wave, and it makes this analysis difficult. TWES can be extended to oblique incident cases [52] and SAW device structures [48] in combination with periodic 3D FEM.…”

Section: Advanced Fem Simulationmentioning

confidence: 99%

See 2 more Smart Citations

From Microwave Acoustic Filters to Millimeter-Wave Operation and New Applications

et al. 2023

View full text Add to dashboard Cite

This paper reviews the latest developments in microwave acoustic wave devices. After an introduction and brief history of bulk acoustic wave (BAW) and surface acoustic wave (SAW) devices, a review is given for guided SAWs and XBARs -two new technologies, which are promising for future 5G applications. Following this, we discuss recent simulation techniques, such as 3D finite element method (3D FEM) and simulation of nonlinearities, as well as filter synthesis. Next, a review on tunable and reconfigurable acoustics is given. Finally, we present the latest developments in microwave acoustics for millimeter-wave (mm-wave) operation as well as BAW oscillators.INDEX TERMS Bulk acoustic wave (BAW) devices, filter, filter-synthesis, front-end, high power, MTT 70th Anniversary Special Issue, multiplexer, nonlinearity, resonator, surface acoustic wave (SAW) devices.

show abstract

Section: Advanced Fem Simulationmentioning

confidence: 99%

Section: Advanced Fem Simulationmentioning

confidence: 99%

See 1 more Smart Citation

From Microwave Acoustic Filters to Millimeter-Wave Operation and New Applications

et al. 2023

View full text Add to dashboard Cite

show abstract

“…The analysis is performed by the periodic three dimensional (3D) finite element method (FEM) powered by the hierarchical cascading technique. [26][27][28][29][30][31] It is shown that the double busbar configuration offers good energy confinement in addition to suppression of transverse mode resonances in some extent.…”

Section: Introductionmentioning

confidence: 99%

Transverse energy confinement and resonance suppression in SAW resonators using low-cut lithium tantalate

Wong

Liang

et al. 2022

Jpn. J. Appl. Phys.

Self Cite

View full text Add to dashboard Cite

This paper discusses the applicability of double busbar design to surface acoustic wave (SAW) devices employing low-cut lithium tantalate (LT) with multi-layered structure. This design offers good energy confinement, scattering loss suppression and transverse mode suppression for a wide frequency range. In addition, the effectiveness of manipulating the slowness curve shape for transverse mode suppression is demonstrated. First, three different lateral edge designs are applied to the layered SAW configuration on low-cut LT, and their performances are compared using the periodic 3-dimensional finite-element method powered by the hierarchical cascading technique. Then, the discussion is extended to influence of the SAW slowness shape to the transverse mode suppression.

show abstract

“…However, the computation domain of the built-in quasi-3D FEM model is a 3D block, which has much more DOFs than that of the 2D-FEM model. More recently, the GPU-assisted HCT was proposed to accelerate calculation for SAW devices with finite-length structure [18][19][20]. Although GPUs have faster data processing capabilities than CPUs and the calculation speed is further improved, the difficulty with the 2D-FEM model established by the researcher himself or the quasi-3D FEM model with more DOFs still exists, which led to a reduction of the simulation efficiency and calculation speed.…”

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

View full text Add to dashboard Cite

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.

show abstract

Use of Hierarchical Cascading Technique for FEM Analysis of Transverse-Mode Behaviors in Surface Acoustic-Wave Devices

Cited by 31 publications

References 20 publications

From Microwave Acoustic Filters to Millimeter-Wave Operation and New Applications

From Microwave Acoustic Filters to Millimeter-Wave Operation and New Applications

Transverse energy confinement and resonance suppression in SAW resonators using low-cut lithium tantalate

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

Contact Info

Product

Resources

About