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Electrothermal Modeling of Surface Acoustic Wave Resonators and Filters

Title data

Akstaller, Wolfgang ; Weigel, Robert ; Hagelauer, Amélie:
Electrothermal Modeling of Surface Acoustic Wave Resonators and Filters.
In: IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. Vol. 67 (November 2020) Issue 11 . - pp. 2423-2432.
ISSN 1525-8955
DOI: https://doi.org/10.1109/TUFFC.2020.2999545

Official URL: Volltext

Abstract in another language

In this article, an electrothermal modeling approach of surface acoustic wave (SAW) resonators and filters is presented. The starting point for the model is a preliminary design that has to be assessed for thermal aspects. Due to the high geometrical complexity of SAW components, simplifications are elaborated and qualified on resonator and filter levels to prepare the design for thermal simulation. A thermal model is created and simulated in a finite-element method environment. The simulated behavior is exported as a thermal impedance and implemented in a circuit model of a SAW filter. The layout’s electromagnetic behavior is taken into account. Electrothermal models of the SAW resonators and the bus bars are developed. The interface to the thermal impedance is achieved by the use of electrothermal ports. The dynamic effect of the frequency shift is included. Verification is done by a comparison of the temperature increase of a resonator in a filter test structure to a corresponding simulation model. The filter is excited by a radio frequency large signal, and the temperature is detected by the use of a resistive temperature sensor. A simulation that shows the impact of mutual heating between the resonators in a filter environment is performed.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Circuit simulation; Electrothermal modeling; Finite-element method (FEM); Surface acoustic wave (SAW) filter; Temperature-dependent frequency shift
Institutions of the University: Faculties > Faculty of Engineering Science > Chair Communication Electronics > Chair Communication Electronics - Univ.-Prof. Dr.-Ing. Amélie Marietta Hagelauer
Result of work at the UBT: No
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 20 Nov 2020 08:07
Last Modified: 20 Nov 2020 08:07
URI: https://eref.uni-bayreuth.de/id/eprint/60037