Traveling wave excitation sources for FEM analysis of scattering in acoustic waveguide

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

doi:10.1007/s00542-018-4169-7

Cited by 9 publications

(6 citation statements)

References 28 publications

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“…The analysis employed the traveling wave excitation source (TWES) [50]. It should be noted that HCT is easily applicable to TWES calculation without spoiling any advantages of HCT [44], [45].…”

Section: Advanced Fem Simulationmentioning

confidence: 99%

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

et al. 2023

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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.

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Section: Advanced Fem Simulationmentioning

confidence: 99%

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

et al. 2023

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“…The surrounding layers are designed as follows: first, Γ is calculated as a function of β and the incident angle θ to the side edge using periodic 2D FEM 22) in combination with the traveling wave excitation 23) and the hierarchical cascading technique. 24) Then b k , c k , and the number of layers are determined by the fitting.…”

Section: D Scalar Wave Modelmentioning

confidence: 99%

Perturbation analysis of nonlinear responses caused by transverse modes in AlN FBAR based on 2D scalar wave model

Wu,

Luo,

et al. 2023

Jpn. J. Appl. Phys.

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This paper describes perturbation analysis of nonlinear signal generation in apodized BAW devices using a multi-branch LCR equivalent circuit where all necessary simulation parameters are derived by the two-dimensional (2D) scalar wave model. Nonlinear signals are evaluated by adding two voltage sources representing nonlinear strain and electric flux, and their amplitude is determined by currents in the circuit for linear analysis. Simulated second and third harmonic responses agree well with experimental ones. The magnification mechanism of spurious resonances is also discussed.

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“…5(a), where one frame (bump) is placed on the top electrode edge to adjust the phase of the reflection coefficient G ¢ y at the incident edge of the frame. The traveling wave excitation source 15) is applied for the frequency-domain scattering analysis using the 2D FEM, 16) and the hierarchical cascading technique 17) is applied for the calculation acceleration.…”

Section: Device Designmentioning

confidence: 99%

“…Next, frames are designed systematically for the standard piston mode operation. Reflection characteristics are analyzed by the 2D FEM in combination with the traveling wave excitation source 15,16) and the hierarchical cascading technique, 17) while the admittance is obtained by the standard 2D FEM. Then, it is shown how the frame design influences the resonator performance.…”

Section: Introductionmentioning

confidence: 99%

Spurious-free thickness-shear bulk acoustic resonators on lithium niobate using standard and broadband piston mode designs

Wu¹,

Wong²,

He³

et al. 2022

Jpn. J. Appl. Phys.

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This paper describes design and fabrication of sprious-free thickness shear bulk acoustic resonators (TSBARs) using the lithium niobate (LN) plate. Previously, the authors conjected from the experiment on the TSBAR that cutoff edges with crystal LN X-plane serve as ideal reflectors for the piston mode operation, and complete suppression is possible by adding the standard piston mode design to the other edges normal to the X-axis. Following to this conjecture, the traditional piston mode structure is designed by the traditional two-dimensional finite element method, and the TSBAR is fabricated following to the design. The experiment showed complete suppression of the transverse mode resonances, and the conjecture was verified.

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Traveling wave excitation sources for FEM analysis of scattering in acoustic waveguide

Cited by 9 publications

References 28 publications

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

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

Perturbation analysis of nonlinear responses caused by transverse modes in AlN FBAR based on 2D scalar wave model

Spurious-free thickness-shear bulk acoustic resonators on lithium niobate using standard and broadband piston mode designs

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