RFID (Radio Frequency IDentification) technology consists of a system of tags and readers that can be used to identify and encode a variety of information. The tags are small silicon chips that contain a unique identifying code and may also contain some form of stored battery power and on-chip memory. An RFID reader is a unit that emanates radio signal at a precise frequency that causes the RFID tags to respond with their identifying code. While RFID chips can be classified on the basis of several characteristics such as frequency, multi read capability, signal strength, and data storage, the primary distinction between RFID systems is based on the tag power source.
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