Mixed Matrix Representation of SAW Transducers

Tobolka, G.

doi:10.1109/t-su.1979.31128

Cited by 133 publications

(52 citation statements)

References 3 publications

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“…In 3D simulations this wave appears near 366 MHz, and exhibits displacement in the transverse direction ( Figure 5). The conductance peaks for the representative devices were fit using the theoretical expression for the real part of the admittance obtained by cascading N pairs of fingers using the P-matrix formulation [23] or equivalently using the approximate expression [24]…”

Section: Model Verification and Input Admittancementioning

confidence: 99%

Langasite surface acoustic wave gas sensors: modeling and verification

Zheng

Greve

Oppenheim

2013

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

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We report finite element simulations of the effect of conductive sensing layers on the surface wave velocity of langasite substrates. The simulations include both the mechanical and electrical influences of the conducting sensing layer. We show that three-dimensional simulations are necessary because of the out-of-plane displacements of the commonly used (0, 138.5, 26.7) Euler angle. Measurements of the transducer input admittance in reflective delay-line devices yield a value for the electromechanical coupling coefficient that is in good agreement with the threedimensional simulations on bare langasite substrate. The input admittance measurements also show evidence of excitation of an additional wave mode and excess loss due to the finger resistance. The results of these simulations and measurements will be useful in the design of surface acoustic wave gas sensors.

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Section: Model Verification and Input Admittancementioning

confidence: 99%

Langasite surface acoustic wave gas sensors: modeling and verification

Zheng

Greve

Oppenheim

2013

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

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“…Therefore, the influence of the load on the signal reflected from IDT3 is simulated. The interaction of a SAW with an IDT can be described by the P-matrix model introduced by Tobolka [63]. As shown in Fig.…”

Section: Integrated Saw-gmi Sensormentioning

confidence: 99%

“…Where rm is the ratio of the electrical to acoustical transformer, CIDT is the capacitance of the IDT, Za is the acoustic impedance and is the transit angle [63].…”

Section: Integrated Saw-gmi Sensormentioning

confidence: 99%

Surface Acoustic Wave Based Magnetic Sensors

Rowais¹,

Kosel²

2013

Modeling and Measurement Methods for Acoustic Waves and for Acoustic Microdevices

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“…Telecommunication industry with the tremendous growth of mobile communications makes extensive use of resonators and filters with GHz operating frequency range. Numerous models have been developed to predict the behaviour of SAW and BAW devices in response to external loads: P-matrix model 25 and coupling-of-modes 26 (COM) for SAW devices, matrix model 27 for BAW devices and for both of them equivalent circuit model, 28,29 mapped orthogonal functions model 30,31 and finite element method (FEM). 32,33 The FEM is always interesting because it can handle complicated geometries and electrode patterns of real device structures but can sometimes be computationally intensive.…”

Section: Introductionmentioning

confidence: 99%

Mapped orthogonal functions method applied to acoustic waves-based devices

Lefebvre

Ratolojanahary

et al. 2016

AIP Advances

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This work presents the modelling of acoustic wave-based devices of various geometries through a mapped orthogonal functions method. A specificity of the method, namely the automatic incorporation of boundary conditions into equations of motion through position-dependent physical constants, is presented in detail. Formulations are given for two classes of problems: (i) problems with guided mode propagation and (ii) problems with stationary waves. The method’s interest is demonstrated by several examples, a seven-layered plate, a 2D rectangular resonator and a 3D cylindrical resonator, showing how it is easy to obtain either dispersion curves and field profiles for devices with guided mode propagation or electrical response for devices with stationary waves. Extensions and possible further developments are also given.

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Mixed Matrix Representation of SAW Transducers

Cited by 133 publications

References 3 publications

Langasite surface acoustic wave gas sensors: modeling and verification

Langasite surface acoustic wave gas sensors: modeling and verification

Surface Acoustic Wave Based Magnetic Sensors

Mapped orthogonal functions method applied to acoustic waves-based devices

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