A number of pilot tests have been done to confirm RFID?s performance at the supply chain managements. In these cases, RFID work as the bar cord systems that can connect their IDs to databases. The passive RFID system has been used in these pilot tests to meet the severe cost requirements. The result of these tests pointed out some week points of passive tags as 1)Communication range changes depend on material 2)Reader and Tags antenna pattern make null position 3)Reflection waves come from wall and ceiling make null position.

The active RFID systems are expected to solve for these points. Additionally sensor capability can be loaded. We made sensor active RFID with LF (Low Frequency) module and installed these active RFIDs in an actual container to acquire movement history and the sensor data. As a result, we find our sensor active tag has the capability to acquire a movement history easily with low power consumption without GPS.