A new batteryless active RFID system: Smart RFID

Since RFID systems start to share the supply chain market with the barcodes, new application areas have become attractive where the wireless radio-frequency communication and identification is possible. Unlike the passive systems, active RFID systems can be used as sensor nodes and they can monitor and store environment data, such as acceleration or temperature. However, the need of external battery limits their applications to where battery replacements are only possible. In this paper, a new batteryless active RFID transponder system has been proposed based on a MEMS (Micro-Electro Mechanical Systems) energy scavenger. The mechanical part of the system has been designed and fabricated. The circuit level simulations have been performed. In this context, a new modulation scheme has been proposed and a magnetic random access memory (MRAM) has been used for the data storage.