Passive RFID system

Definition
A passive RFID system is

"composed of three components &mdash; an interrogator (reader), a passive tag, and a host computer. The tag is composed of an antenna coil and a silicon chip that includes basic modulation circuitry and non-volatile memory. The tag is energized by a time-varying electromagnetic radio frequency (RF) wave that is transmitted by the reader. This RF signal is called a carrier signal. When the RF field passes through an antenna coil, there is an AC voltage generated across the coil. This voltage is rectified to supply power to the tag. The information stored in the tag is transmitted back to the reader]. This is often called [[backscattering. By detecting the backscattering signal, the information stored in the tag can be fully identified. |undefined"