Passive RFIDPassive RFID tags send an identification signal when exited by radio waves from a reader. Some additional information stored on the tag may also be sent. • Inexpensive tags, no own power source• Read range from 10 cm to 6 m (4 inches to 20 feet)• Expensive scanners (receivers) for higher read ranges• Not useable for RTLS (Real Time Location Systems) |
Active RFIDActive RFID tags send an identification signal at preset intervals to the readers. The tags use different frequencies depending on the interference and accuracy requirements. • Powered by batteries, larger size• Longer read range than passive tags• Smaller, less obtrusive readers• Useable for indoor positioning (RTLS) |
RFID Technology
Radio-frequency identification
RFID tags (transponders) emit radio signals that are received by receivers (readers). One generally differentiates between passive and active tags based on their power source.
Some of the characteristics of these two types are listed below. The BeanCounter Critical Resource Management System™ uses both tags to manage objects and their location.
