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Piezoelectric voltage coupled reentrant cavity resonator
N C Carvalho1, Y Fan1, J-M Le Floch1
1School of Physics, The University of Western Australia, 35 Stirling Hwy, 6009 Crawley, Western Australia, Australia.
The Review of Scientific Instruments
|November 3, 2014
Summary
A novel piezoelectric reentrant cavity offers voltage-controlled tuning and mechanical mode transduction. This tunable resonator demonstrates versatile applications in material characterization and microwave devices.
Area of Science:
- Physics
- Materials Science
- Electrical Engineering
Background:
- Microwave resonant cavities are fundamental components in various electronic systems.
- Voltage-tunable microwave devices are crucial for advanced signal processing and communication.
- Piezoelectric actuators offer precise mechanical control for micro- and nano-scale applications.
Purpose of the Study:
- To develop and characterize a piezoelectric voltage-coupled microwave reentrant cavity.
- To demonstrate the cavity's capability as a voltage-tunable resonator.
- To explore its use as a transducer for mechanical modes and piezoelectric material sensitivity.
Main Methods:
- Fabrication of a reentrant cavity with an integrated piezoelectric actuator.
- Application of voltage to the piezoelectric actuator for controlled post displacement.
- Testing of the cavity's resonant properties and transduction capabilities at room and cryogenic temperatures.
- Validation of experimental results using Finite Element (FE) software.
Main Results:
- Successful development of a piezoelectric voltage-coupled microwave reentrant cavity.
- Demonstration of voltage-tunable resonant frequency over a high dynamic range.
- Characterization of the cavity as a transducer for mechanical vibrations and piezoelectric material properties.
- Experimental data correlated well with FE simulations across different temperatures.
Conclusions:
- The piezoelectric reentrant cavity provides a robust platform for voltage-controlled microwave resonance.
- The device serves as a versatile transducer for studying mechanical and material properties.
- This technology has potential applications in tunable filters, sensors, and advanced microwave systems.
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