A new simulation model for nonlinearity of SAW resonator filters

Nako, Katsuhiro; Nakagawa, Ryo; Suzuki, Tomiko M.; Takigawa, Kazuhiro; Shimizu, Hiroshi; Kyouya, Haruki

doi:10.1109/ultsym.2011.0460

Cited by 10 publications

(6 citation statements)

References 4 publications

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“…Various simulation techniques have been proposed by other authors for the nonlinear signals generated in SAW= BAW devices. [11][12][13][14][15][16][17][18][19][20][21][22] However, to the best of our knowledge, none of them discussed the contributions of each mechanism separately. Furthermore, they discussed only results for a limited number of combinations of the driving and resulting frequencies, although their choice has significant impacts on the nonlinear signal levels.…”

Section: Introductionmentioning

confidence: 99%

Discussion about generation mechanisms of third-order nonlinear signals in surface acoustic wave resonators based on simulation

Nakagawa

Suzuki

Shimizu

et al. 2016

Jpn. J. Appl. Phys.

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In this paper, we discuss the generation mechanisms of third-order nonlinearity in surface acoustic wave (SAW) devices on the basis of simulation results, which are obtained by a proposed method for this discussion. First, eight nonlinear terms are introduced to the piezoelectric constitutive equations, and nonlinear stress and electric flux fields are estimated using linear strain and electric fields calculated by a linear analysis, i.e., the coupling of mode simulation. Then, their contributions are embedded as voltage and current sources, respectively, in an equivalent circuit model, and nonlinear signals appearing at external ports are estimated. It is shown that eight coefficients of the nonlinear terms can be determined from a series of experiments carried out at various driving and resulting frequencies. This is because the effect of each nonlinear term on the nonlinear signal outputs changes markedly with the conditions. When the coefficients are determined properly, the simulations agree well with some measurement results under various conditions.

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Section: Introductionmentioning

confidence: 99%

Discussion about generation mechanisms of third-order nonlinear signals in surface acoustic wave resonators based on simulation

Nakagawa

Suzuki

Shimizu

et al. 2016

Jpn. J. Appl. Phys.

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“…On the other hand, a number of simulation techniques for third-order nonlinearity have also been proposed in recent years. [7][8][9][10][11][12][13][14][15] Although some degree of accuracy has already been achieved, it is still unclear where and how the third-order nonlinear signals are generated even in those approaches. In fact, most of the parameters necessary for the simulation have been determined by fitting with experiments.…”

Section: Introductionmentioning

confidence: 99%

Influence of electrode structure on generation of third-order nonlinearity in surface acoustic wave devices

Nakagawa

Suzuki

Shimizu

et al. 2015

Jpn. J. Appl. Phys.

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In this paper we describe the influence of the electrode material on the generation of the third-order nonlinearity in surface acoustic wave (SAW) devices fabricated on a 42°YX-LiTaO3 substrate. It is shown that the crystallinity of the Al layer in the electrode considerably influences the intensity of the third-order nonlinearity. Surprisingly, electrodes with better crystallinity generate stronger third-order nonlinearity. This indicates that the Al layer is one of the major reasons behind its generation. It is also shown that the third-order nonlinearity can be reduced by properly designing the layer stack of the electrodes such that acoustic strain is not concentrated in the Al layer. This means that the acoustic strain in the electrode is one of the main causes of the third-order nonlinearity.

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“…However, owing to the nonlinear specifications of 3GPP, the design method of SAW duplexers must include nonlinear analysis and simulation. 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%

“…Besides these, Nakagawa et al from Murata and Hashimoto et al [30][31][32][33] proposed a nonlinear simulation method which considered all nonlinear generation mechanisms. By comparing the simulation results with the measured results, it can be found that the contribution of each mechanism to the nonlinear signal changes significantly with the change of the input and output frequency conditions.…”

Section: Other Nonlinear Modelsmentioning

confidence: 99%

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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A new simulation model for nonlinearity of SAW resonator filters

Cited by 10 publications

References 4 publications

Discussion about generation mechanisms of third-order nonlinear signals in surface acoustic wave resonators based on simulation

Discussion about generation mechanisms of third-order nonlinear signals in surface acoustic wave resonators based on simulation

Influence of electrode structure on generation of third-order nonlinearity in surface acoustic wave devices

Research in Nonlinearity of Surface Acoustic Wave Devices

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