RFID CHEMICAL SENSORS BASED ON CHIPLESS RADIO FREQUENCY IDENTIFICATION RFID ARCHITECTURES

摘要

Methods and structures for radio frequency identification (RFID) sensors that can be used to monitor various environmental conditions. The measured environmental conditions depend on the sensor material used in the RFID sensor. The sensor material is selected based on the flux in electrical conductivity with respect to its saturation of the environmental conditions being monitored. The sensor material is positioned between adjacent conductive structures of the RFID sensor. When a change in environmental conditions is measured, the electrical conductivity of the sensor material changes, thereby increasing or decreasing the amplitude of the response by the RFID sensor to a query by the RFID reader.