What Is RFID & How It works?

What is RFID (Radio Frequency Identification)?

RFID is a technology of contactless and wireless communication that incorporates the use of electromagnetic or electrostatic coupling in the radio frequency portion of the electromagnetic spectrum to uniquely identify an object, animal or person.

How does it work?

Each RFID system at least consists of three devices: a scanning antenna, a transceiver and a transponder. When the scanning antenna and transceiver are integrated, they are referred to call an RFID reader or interrogator. There are two types of RFID readers -- fixed readers and handheld readers. The RFID reader is a network-connected device that can be portable or permanently attached. It uses radio waves to transmit signals that activate the tag. Once activated, the tag reflect a wave back to the antenna, where it is translated into data.

Handheld Reader

The transponder is embedded in the RFID tag. The read range for RFID tags varies depends on factors including the type of tag, type of reader, RFID frequency and interference in the surrounding environment or from other RFID tags and readers. Tags in which have a stronger power source also help to have a longer read range.

Some Different RFID Tag Images: