Title:
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Nonlinear distributed model for bulk acoustic wave resonators
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Author:
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Collado Gómez, Juan Carlos; Rocas Cantenys, Eduard; Mateu Mateu, Jordi; Padilla Díaz, Alberto; O'Callaghan Castellà, Juan Manuel
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. RF&MW - Grup de Recerca de sistemes, dispositius i materials de RF i microones |
Abstract:
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This work expands the model proposed by Krimtholz,
Leedom, and Matthaei (KLM) model to account for the nonlinear
effects occurring in acoustic devices due to the nonlinear stiffened
elasticity.We show that a nonlinear distributed capacitance in the
acoustic transmission line of the KLM model can account for the
distributed nature of the nonlinear effects. Specifically, we use the
nonlinear telegrapher’s equation to find closed-form equations for
intermodulation distortion and harmonic generation. We confirm
the validity of these equations by comparing their results with those
provided by aKLMequivalent circuit in which the nonlinear transmission
line is implemented by cascading many L-C cells having
a voltage-dependent capacitance. To further confirm the model, we
show measured nonlinear effects in a thin film bulk acoustic resonator
in close agreement with the equivalent circuit simulations. |
Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació -Nonlinear theories -Resonator -Bulk acoustic wave (BAW)Film bulk acousticResonator -Ones |
Rights:
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Document type:
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Article - Published version Article |
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