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Remote characterization of resonance frequency with a wirelessly powered parametric oscillator
1Department of Electrical and Computer Engineering, Michigan State University, East Lansing, MI, 48824, USA.
IEEE Transactions on Instrumentation and Measurement
|July 14, 2020
Summary
This study introduces a new method for remotely measuring LC resonator frequencies using wirelessly-powered parametric resonators. This technique enables indirect characterization of resonators, improving sensor applications in closed environments.
Area of Science:
- Electrical Engineering
- Resonant Circuits
- Sensor Technology
Background:
- Measuring LC resonator frequency is crucial for standalone capacitive sensors in closed environments.
- Existing methods face challenges with coupling efficiency and remote identification in noisy backgrounds.
Purpose of the Study:
- To propose a novel method for remote frequency measurement of LC resonators.
- To improve coupling efficiency and signal identification for resonators in inaccessible locations.
Main Methods:
- Integrating LC resonators with wirelessly-powered parametric resonators.
- Measuring minimum oscillation power levels at various pumping frequencies to derive frequency response curves.
- Developing analytical models based on parametric oscillation principles.
Main Results:
- Demonstrated indirect characterization of LC resonators via frequency-dependent power curves.
- Validated analytical models with on-bench measurements on diverse parametric resonator circuits.
- Predicted measurable extremities in power curves based on resonance frequency ratios.
Conclusions:
- The proposed method enables remote characterization of LC resonators, overcoming near-field limitations.
- Parametric resonators offer a viable solution for indirect frequency measurement in challenging environments.
- This technique has potential applications in structural health monitoring and biomedical implants.
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