Novel FEM Models of Intermodulation Effects in BAW and SAW Devices

Pang, Xiangnan; Yong, Yook‐Kong

doi:10.1109/ultsym.2019.8926068

Cited by 2 publications

(3 citation statements)

References 4 publications

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“…Thus, to achieve the analysis of nonlinear characteristics, serval phenomenological models have also been developed, such as nonlinear Butterworth Van Dyke (BVD) model [3], nonlinear Mason equivalent model [4,19], nonlinear P-matrix model [20,21], nonlinear COM model [22][23][24][25], rigorous nonlinear COM and P matrix model [26][27][28][29] and other nonlinear phenomenological models [30][31][32][33][34][35]. Furthermore, a finite element algorithm model was also developed for the nonlinear analysis [36][37][38].…”

Section: Simulation Methods Of Nonlinearity In Saw Devicesmentioning

confidence: 99%

“…This direct approach opens the way for a FEM-based simulation of nonlinearities for finite and generalized structures avoiding the simplifications of phenomenological approaches. Yook Yong and Xiannan Pang et al [36][37][38] also calculated the harmonics and intermodulation of SAW and BAW devices by employing COMSOL FEM software.…”

Section: Precise Simulation Modelsmentioning

confidence: 99%

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Research in Nonlinearity of Surface Acoustic Wave Devices

Tian

Wang

et al. 2021

Micromachines

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Surface acoustic wave (SAW) devices are one of the indispensable components in the radio frequency (RF) front-end of mobile phones. With the development of mobile communication technology, the requirements for linear specification of devices are more and more strict. Nonlinear distortions of SAW devices have a serious influence on the application of mobile RF modules. To satisfy the strict requirement of linearity of communication system, it is necessary to understand the generation mechanism of nonlinearity and study the accurate modeling, appropriate measurement methods, and nonlinear response elimination technology. In this paper, we summarize the research progress on the nonlinearity of SAW devices in recent years from four aspects: the generation mechanism, simulation methods, measurement system, and suppression technology. The nonlinear harmonics with the nonlinear Mason equivalent circuit model are simulated. Furthermore, harmonics and intermodulation signals of SAW filters are tested by the authors. Thanks to these research studies, it is of great significance to the development of future RF front-end modules with high linear SAW devices.

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Section: Simulation Methods Of Nonlinearity In Saw Devicesmentioning

confidence: 99%

Section: Precise Simulation Modelsmentioning

confidence: 99%

Research in Nonlinearity of Surface Acoustic Wave Devices

Tian

Wang

et al. 2021

Micromachines

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“…Parameters containing information on nonlinearity were obtained by fitting to experimental data. Calculations, relating nonlinear effects like third-order intermodulational distortions (IMD3) directly to linear and nonlinear material constants of the elastic media involved, use the finite element method (FEM) [8][9][10][11][12][13][14][15]. In contrast to the phenomenological models mentioned above, finite element calculations do not rely on restrictive model assumptions.…”

Section: Introductionmentioning

confidence: 99%

FEM Modeling of Electro-Acoustic Nonlinearities in Surface Acoustic Wave Devices: A Methodological Review

Mayer

Mayer³

et al. 2023

Acoustics

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In the framework of electro-elasticity theory and the finite element method (FEM), a model is set up for the computation of quantities in surface acoustic wave (SAW) devices accounting for nonlinear effects. These include second-order and third-order intermodulations, second and third harmonic generation and the influence of electro-acoustic nonlinearity on the frequency characteristics of SAW resonators. The model is based on perturbation theory, and requires input material constants, e.g., the elastic moduli up to fourth order for all materials involved. The model is two-dimensional, corresponding to an infinite aperture, but all three Cartesian components of the displacement and electrical fields are accounted for. The first version of the model pertains to an infinite periodic arrangement of electrodes. It is subsequently generalized to systems with a finite number of electrodes. For the latter version, a recursive algorithm is presented which is related to the cascading scheme of Plessky and Koskela and strongly reduces computation time and memory requirements. The model is applied to TC-SAW systems with copper electrodes buried in an oxide film on a LiNbO3 substrate. Results of computations are presented for the electrical current due to third-order intermodulations and the displacement field associated with the second harmonic and second-order intermodulations, generated by monochromatic input tones. The scope of this review is limited to methodological aspects with the goal to enable calculations of nonlinear quantities in SAW devices on inexpensive and easily accessible computing platforms.

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Novel FEM Models of Intermodulation Effects in BAW and SAW Devices

Cited by 2 publications

References 4 publications

Research in Nonlinearity of Surface Acoustic Wave Devices

Research in Nonlinearity of Surface Acoustic Wave Devices

FEM Modeling of Electro-Acoustic Nonlinearities in Surface Acoustic Wave Devices: A Methodological Review

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