24 GHz RFID Communication System for Product Lifecycle Applications

This paper presents the fundamental construction of a 24 GHz Radio Frequency Identification system using an optically powered transponder integrable in metal. Hereby, the system consists of a reader and a transponder. An overview of the transponder design including the modulator and demodulator circuit and its main characteristic values is given. On transponder side the communication is controlled by a low-power microcontroller. An I2C bus is implemented allowing a flexible connection of sensors and memory. Furthermore, the reader concept is presented and a communication example is used to explain the implemented protocol.