Dual-Square-Split-Ring-Enclosed Microstrip-Based Sensor for Noninvasive Label-Free Detection

Area of Science:

• Electromagnetics
• Materials Science
• Sensor Technology

Background:

• Microwave sensors are crucial for material characterization.
• Metamaterials offer unique electromagnetic properties for sensor enhancement.
• Developing compact, high-sensitivity sensors is an ongoing challenge.

Purpose of the Study:

• To present a novel metamaterial-incorporated microwave sensor for material characterization.
• To investigate the performance of a sensor with a dual-square-shaped metamaterial split-ring.
• To analyze the sensor's sensitivity and frequency deviation with varying material permittivity.

Main Methods:

• Design and simulation of a single-port microwave sensor using CST.
• Incorporation of a dual-square-shaped metamaterial split-ring structure.
• Validation using ADS equivalent circuit model and HFSS simulation.
• Parametric analysis with different substrate materials.

Main Results:

• The sensor exhibits two resonant frequencies due to electromagnetic interaction.
• Dual split rings enhance electromagnetic field accumulation, increasing sensor sensitivity.
• Observed good agreement between frequency deviation and material permittivity variations.
• Demonstrated the sensor's effectiveness for material characterization.

Conclusions:

• The proposed metamaterial microwave sensor is effective for material characterization.
• The dual split-ring design enhances sensor performance and compactness.
• The sensor shows promise for sensitive detection of material properties.