Dual-Band Split Ring Resonator Sensor for Independent Simultaneous Multi-Material Identification

This paper presents a novel microwave reader-tag-based sensor designed for the real-time, simultaneous measurement of the properties of two different materials under test. Conventional techniques for evaluating multiple materials typically depend on individual sensors for each material, which increases complexity and limited data integration. Our proposed sensor addresses these challenges by integrating both sensing capabilities into a single device. Utilizing a transmission line (TL) as the reader and two split ring resonator (SRR)-based tags, this sensor achieves two distinct resonances at specified frequencies, which are completely isolated from each other. Each resonance is responsible for sensing changes in the electrical properties of its surrounding environment. We highlight the advantages of employing this sensor for real-time monitoring and analysis, emphasizing its promising potential in various applications such as precision agriculture, biomedical engineering, and more. The integration of independent dual-material sensing in a single planar microwave sensor not only simplifies the measurement process but also enhances data accuracy and reliability.