An active RFID tag is one in which battery power is used to supply power to the electronics. This enables greater distances to be achieved as the tag is not dependent upon the received power to provide a reflected signal, and the control and processing circuits can be more sophisticated as in the case of the semi-passive RFID tag.
Advantages active RFID tags:
* The range of active RFID tags can be many metres - often 30 metres or more.
* As battery power is required, this may allow much greater functionality to be incorporated.
Disadvantages active RFID tags:
* An active RFID tag cannot function without battery power. This limits its lifetime, or requires maintenance.
* RFID active tags are much more expensive to manufacture.
* An active RFID tags will be physically larger than a passive one and this may limit its use.
* Battery end of life can result in loss of functionality while the battery is down. This can be seen as a failure within the system
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