A nonlinear elastic model for predicting triple beat in SAW duplexers

Inoue, S.; Hara, Motoaki; Iwaki, Masafumi; Tsutsumi, J.; Nakamura, Hiroshi; Ueda, Masahiko; Satoh, Y.; Mitobe, S.

doi:10.1109/ultsym.2011.0459

Cited by 23 publications

(29 citation statements)

References 6 publications

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“…The source of the nonlinearity may refer to the mechanisms from the piezoelectric constitutive equations [6]. As they satisfy the piezoelectric constitutive equations:…”

Section: Generation Mechanism Of Nonlinearitymentioning

confidence: 99%

“…Even so, research teams including Qorvo, Murata, and Chiba University [3,6,[8][9][10][11][12][13]22,31] have built and implemented the measurement systems on harmonics and intermodulation of nonlinearity for SAW devices. Moreover, our team also developed a harmonics and intermodulation measurement platform for SAW resonators, filters, and duplexers both on-chip and on PCB board.…”

Section: Experimental Measurement For Nonlinear Signalsmentioning

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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“…The source of the nonlinearity may refer to the mechanisms from the piezoelectric constitutive equations [6]. As they satisfy the piezoelectric constitutive equations:…”

Section: Generation Mechanism Of Nonlinearitymentioning

confidence: 99%

Section: Experimental Measurement For Nonlinear Signalsmentioning

confidence: 99%

Research in Nonlinearity of Surface Acoustic Wave Devices

Tian

Wang

et al. 2021

Micromachines

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“…A simulation model of nonlinear effects in SAW components is required in order to better characterize, model, and minimize the nonlinearities. The generation of IMD3 caused by the nonlinearity of SAW devices has been studied by several authors based on simplified models such as P-matrix [3], [4], coupling of modes [5], [6], or the Mason model [7], and more recently a model based on the finite element method (FEM) [1], [2], [8]. Fig.…”

Section: Investigation On Third-order Intermodulationmentioning

confidence: 99%

“…Using the electroelasticity theory, it was shown that a nonlinear P-matrix simulation model using a single frequencyindependent effective nonlinearity constantĈ(η), which may depend on the metallization ratio (η), can predict the IMD3 of a layered system very well [3], [5], [8]. In [2] and [8], this very same effective nonlinear constant was theoretically evaluated using a FEM approach, where linear fields, associated with input tones, are combined with the nonlinear material tensor data to obtain the sources of nonlinear fields.…”

Section: Investigation On Third-order Intermodulationmentioning

confidence: 99%

Investigation on Third-Order Intermodulation Distortions Due to Material Nonlinearities in TC-SAW Devices

Chauhan

Mayer²,

Mayer

et al. 2018

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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Nonlinearity can give rise to intermodulation distortions in surface acoustic wave (SAW) devices operating at high input power levels. To understand such undesired effects, a finite element method (FEM) simulation model in combination with a perturbation theory is applied to find out the role of different materials and higher order nonlinear tensor data for the nonlinearities in such acoustic devices. At high power, the SAW devices containing metal, piezoelectric substrate, and temperature compensating (TC) layers are subject to complicated geometrical, material, and other nonlinearities. In this paper, third-order nonlinearities in TC-SAW devices are investigated. The materials used are LiNbO-rot128YX as the substrate and copper electrodes covered with a SiO film as the TC layer. An effective nonlinearity constant for a given system is determined by comparison of nonlinear P-matrix simulations to third-order intermodulation measurements of test filters in a first step. By employing these constants from different systems, i.e., different metallization ratios, in nonlinear periodic P-matrix simulations, a direct comparison to nonlinear periodic FEM-simulations yields scaling factors for the materials used. Thus, the contribution of the different materials to the nonlinear behavior of TC-SAW devices is obtained and the role of metal electrodes, substrate, and TC film are discussed in detail.

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“…This concern led to extend the research on modeling and simulation of the nonlinearities of SAW devices during the last two decades [1]- [11]. These references used different approaches, for example, based on finite element model (FEM) [1], circuit-level design techniques [2], [3], Coupling of Modes (COM) theory [4]- [8] or P-Matrix [9]- [11]. Despite of the different published approaches, there is still a lack of generalized consensus about the origin of the nonlinear behaviour.…”

Section: Introductionmentioning

confidence: 99%

Distributed Nonlinear Model and Fast Analysis for In-Band IMD3 Prediction of Surface Acoustic Wave Resonators

Gonzalez-Rodriguez

Collado

Mateu

et al. 2022

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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The motivation of this work is to analyze the in-band intermodulation distortion (IMD) occurring in Surface AcousticWave (SAW) devices, using a recently developed fast method based on the Input-Output Equivalent Sources (IOES). The method calculates the equivalent current sources of a given harmonic (H) or IMD, which when applied at the boundaries of any uniform nonlinear region produce the same nonlinearities than the full distributed circuit. The accuracy of the method is validated with a very simplified SAW resonator with ten digits, which is modelled by a discretized Mason-based circuit. The IOES method provides equal results than the ones obtained through Harmonic Balance (HB) simulations, performed by means of a commercial software, being the first 1000 times faster.Once the accuracy of the method is guaranteed, it is used to analyze the measured in-band IMD3 of several Lithium Tantalite 42º cut LSAW resonators with different pitch and duty factor at the B66 LTE frequency band. Those resonators are comprised of 100 and 20 electrode pairs for the active region and each of the reflectors respectively, which implies the analysis of a very large distributed nonlinear problem with thousands of nonlinear local sources. The IOES method takes 35.4 seconds in simulating 51 frequency points, whereas this simulation is not possible using a commercial HB simulator on a general-purpose computer.

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A nonlinear elastic model for predicting triple beat in SAW duplexers

Cited by 23 publications

References 6 publications

Research in Nonlinearity of Surface Acoustic Wave Devices

Research in Nonlinearity of Surface Acoustic Wave Devices

Investigation on Third-Order Intermodulation Distortions Due to Material Nonlinearities in TC-SAW Devices

Distributed Nonlinear Model and Fast Analysis for In-Band IMD3 Prediction of Surface Acoustic Wave Resonators

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