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Design of Double-Layer Electrically Extremely Small-Size Displacement Sensor.
Yi-Dong Wang1, Feng-Yuan Han1, Jin Zhao1
1Department of Electronics, Peking University, Beijing 100871, China.
Sensors (Basel, Switzerland)
|July 24, 2021
Summary
This study introduces a compact metamaterial displacement sensor using coupled split-ring resonators (SRRs). The novel design achieves high sensitivity and a small footprint for precision industrial measurements.
Area of Science:
- Metamaterials
- Microwave Engineering
- Sensor Technology
Background:
- Traditional displacement sensors often face limitations in size and sensitivity.
- Metamaterials offer unique electromagnetic properties for advanced sensor design.
Purpose of the Study:
- To propose a novel, extremely small, and highly sensitive displacement sensor.
- To leverage metamaterial elements for enhanced sensing capabilities.
Main Methods:
- Design of a metamaterial element using coupled split-ring resonators (SRRs).
- Integration of a feeding structure with a rectangular opening loop and a double-layer coupled SRR sensing structure.
- Adjustment of resonator split gap position to control detection directions (x- or y-axis).
Main Results:
- Achieved an extremely compact sensor size of 0.05λ₀ × 0.05λ₀.
- Demonstrated high sensitivity and a high quality factor (Q-factor).
- Enabled multi-directional displacement detection without increasing physical dimensions.
Conclusions:
- The proposed metamaterial displacement sensor offers significant size reduction and high performance.
- The sensor's capabilities make it suitable for high-precision industrial measurement applications.
