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What is RFID Technology?

RFID stands for radio frequency identification. Radio frequency waves are the invisible signals that travel through the air and the walls of our homes to bring us music and news. Radio waves can be sent at different frequencies, like the different stations on the radio.

In the U.S., the FCC has reserved some radio frequencies for uses other than commercial radio broadcasts. RFID technology is one of those uses.

What Is an RFID System?

• An individual Electronic Product Code (EPC) that identifies not only the type of object, but tells which specific object it is.
• An RFID tag, which is a tiny electronic circuit that holds the EPC code and other information about the object.
• A miniature antenna, made from a flat coil of wire, attached to the RFID tag. The tag and antenna are usually covered in plastic or glass.
• An RFID reader that sends radio frequency signals out to the tags and reads the signals that come back from the tags. Readers can be attached to the door frame of a warehouse, next to a conveyor belt, or incorporated into a hand-held scanner.
• Software, sometimes called "Middleware,” which takes the data coming in from several RFID readers, filters it, sorts it, and sends the important information on to the main business software.

Active vs. Passive Tags

There are two basic types of RFID tags: Active tags and passive tags. Active tags contain miniature batteries that power the electronic circuit contained in the chip.

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