Radio frequency identification is a term used to describe a system that transfers the identity of an object or person wirelessly using radio waves. In general, radio frequency identification is automatic identification technologies. RFID is used in many items we use such as EZPass or ID tags for your pets. The purpose of RFID is to enable data to be sent by a portable device which is called the tag. The tag is then read by an RFID reader and created according to the requirements of that application. The information that is stored on this tag can contain identification or location information. Identification can be anything such as price, color, date of purchase, etc. The tag also can be used to track moving objects.
RFID consists of three components: antenna, transceiver, and transponder. The antenna send out radio signals to activate the tag and to read and write data to it. The reader then receives the radio waves in ranges from one inch to 100 feet or more. When an RFID tag passes through the electromagnetic zone, it pics up on the reader's activation signal. Lastly, the reader decodes the data that is encoded in the tag and then the data is passed to the host.
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