Enhancing High-Frequency RFID Sensing Through PEDOT-Enabled Technologies

In this study we investigate the integration of Poly(3,4)-ethylenedioxythiophene (PEDOT), a well-known conductive polymer, into high-frequency RFID tags operating at 13.56 MHz to enable real-time sensing applications. By modeling PEDOT as a material with adjustable conductivity, we compare several deposition approaches (including complete coating versus selective deposition using both linear and circular patterns) to examine how the polymer's molecular ordering and deposition methodology affect sensor performance. Our results demonstrate that the PEDOT-enhanced RFID sensor is not only cost-effective and scalable but also seamlessly compatible with existing RFID infrastructures. Comprehensive experimental evaluations, coupled with robust numerical simulations using CST Microwave Studio, confirm that the PEDOT layer can reliably modulate the tag frequency behaviour in response to environmental stimuli. This work lays the groundwork for innovative applications in logistics, healthcare, IoT systems, and environmental monitoring, offering a new generation of high-sensitivity, passive sensors for advanced tracking and temperature integrity control.