A Comprehensive Study of Chipless RFID Sensors for Healthcare Applications

The demand for low-cost healthcare solutions has been increasing and the use of Internet of Things (IoT) devices is becoming more common. IoT devices have the potential to monitor vital health parameters of patients remotely, providing early detection of health problems and reducing medical costs. Chipless RFID sensors, combined with IoT technology, offer cost-effective solutions for healthcare applications. These sensors have significance for remote data collection, object tracking, authentication, and security. In recent years, there has been a growing attention on the design and development of chipless sensors for monitoring health. This paper provides an extensive review of chipless RFID sensors, including their functioning, fabrication techniques, and classifications. The paper further addresses the various smart sensing materials used in chipless RFID sensors, along with challenges and future trends. The IoT-based health monitoring system permits patients to be tracked 24/7 and provides rapid health consultations from doctors in distant places. The technology also allows guardians or family members to remotely monitor patients, which is regarded as one of the most significant benefits of saving human lives. Overall, this review article provides a comprehensive investigation of the potential advantages of chipless RFID sensors and IoT-based systems for healthcare monitoring, paving the way for cost-effective, easily accessible, and reliable healthcare solutions.