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A Miniaturized and Highly Sensitive Microwave Sensor Based on CSRR for Characterization of Liquid Materials
Ahmed Jamal Abdullah Al-Gburi1, Zahriladha Zakaria2, Norhanani Abd Rahman3
1Centre for Telecommunication Research & Innovation (CeTRI), Faculty of Electrical and Electronic Engineering Technology (FTKEE), Malacca 76100, Malaysia.
Materials (Basel, Switzerland)
|May 13, 2023
Summary
A new miniaturized microwave sensor using a complementary split-ring resonator (CSRR) effectively detects liquid materials. This highly sensitive sensor achieves a Q-factor of 520 and sensitivity of 7.032 (MHz)/ε at 2.5 GHz.
Area of Science:
- Microwave Engineering
- Sensor Technology
- Materials Science
Background:
- Miniaturized sensors are crucial for real-time material characterization.
- Complementary split-ring resonators (CSRRs) offer unique electromagnetic properties for sensing applications.
- Accurate detection of liquid properties is essential in various industrial and research fields.
Purpose of the Study:
- To propose and validate a miniaturized, highly sensitive microwave sensor for liquid material detection.
- To enhance sensor sensitivity using a triple-ring CSRR (TR-CSRR) structure and a curve feed.
- To investigate the sensor's performance with different liquid media and derive relationships between permittivity and Q-factor.
Main Methods:
- Design and simulation of a TR-CSRR microwave sensor using Ansys HFSS.
- Electromagnetic simulation to analyze mode resonance and E-field interactions.
- Experimental measurement and sensitivity calculation for various liquid samples (air, ethanol, methanol, DI water) using a polypropylene tube.
Main Results:
- The designed sensor exhibits resonance at 2.5 GHz.
- A high Q-factor of 520 and sensitivity of 7.032 (MHz)/ε were achieved at 2.5 GHz.
- The sensor demonstrated effective characterization of liquid dielectric properties and their impact on resonance.
Conclusions:
- The proposed TR-CSRR microwave sensor is highly sensitive and suitable for liquid material characterization.
- The sensor's performance is influenced by the dielectric properties of the liquid media.
- This sensor shows potential for accurate estimation of solute concentrations in liquids.
