Methods and systems for calibration of RFID sensors used in manufacturing and monitoring systems are provided. The methods include measuring impedance of an RFID sensor antenna, relating the measurement of impedance to one or more parameters (such as physical, chemical and biological properties), computing...http://www.google.de/patents/US7911345?utm_source=gb-gplus-sharePatent US7911345 - Methods and systems for calibration of RFID sensors
