An RFID tag (transponder)
An RFID transceiver is a device that transmits radio waves to RFID tags and receives the radio waves reflected or transmitted by the tags. RFID transceivers also are known as readers and interrogators.
Background
RFID (radio-frequency identification) is a technology that uses computer chips to uniquely identify objects. RFID uses radio waves to transmit wireless information without the need for optical readers.
Components
Examples of RFID tags
An RFID system has two primary components: tags, which are microchips with unique identifiers, and readers, which receive the information from tags. A reader either displays this information on a built-in screen or transmits it to a linked computer system.
Definitions
A walkie-talkie is a familiar type of radio transceiver.
A "transceiver" is a device that both receives and transmits radio waves; a "transmitter-receiver" does the same thing, but the functions are not integrated as they are in a transceiver. A "transponder" either passively reflects or actively transmits radio waves, but only in response to a signal.
Terms as Used in RFID
In RFID terminology, the term "transceiver" is often used interchangeably with "reader" or "interrogator." Tags are sometimes called "transponders." RFID transponders may be active, using battery power to transmit a signal to the transceiver, or passive, reflecting the transceiver's signal back in a modified form.
Tags: radio waves, transmits radio, transmits radio waves, device that, RFID tags, tags RFID