Equivalent Circuit Model Extraction for a SAW Resonator: Below and above Room Temperature

Area of Science:

• Physics
• Electrical Engineering
• Materials Science

Background:

• Surface Acoustic Wave (SAW) resonators are crucial components in various electronic devices.
• Understanding their temperature-dependent behavior is essential for reliable performance.
• Existing characterization methods may not fully capture subtle physical property changes with temperature.

Purpose of the Study:

• To characterize the admittance (Y-) parameters of a SAW resonator across a wide temperature range (0 °C to 100 °C).
• To investigate and highlight the impact of temperature variations on the physical properties of SAW resonators.
• To develop and validate a robust method for extracting equivalent-circuit parameters at different temperatures.

Main Methods:

• Utilized admittance (Y-) parameter measurements for SAW resonator characterization.
• Employed a lumped-element equivalent-circuit model to represent the device.
• Developed a parameter extraction process based on Lorentzian fitting for circuit elements.

Main Results:

• Successfully characterized SAW resonator Y-parameters from 0 °C to 100 °C.
• Demonstrated the significant influence of temperature on the resonator's physical properties.
• Achieved a very good agreement between experimental measurements and equivalent-circuit model simulations.

Conclusions:

• The study provides a comprehensive understanding of temperature effects on SAW resonator characteristics.
• The developed equivalent-circuit model and parameter extraction method are validated for temperature-dependent analysis.
• This work contributes to the design and optimization of SAW devices operating under varying thermal conditions.