Plastic RFID Smart Cards
The Introduction OF Contactless Card 2019-05-24

The contactless card, also known as the RFID card, consists of an IC chip and an inductive antenna, and is packaged in a standard PVC card. The chip and the antenna have no exposed parts. It is a new technology developed in the world in recent years. It successfully combines RFID technology and IC card technology to end the problem of passive (no power in the card) and contactless. It is in the field of electronic devices. A big breakthrough. The card is close to the surface of the reader at a certain distance (usually 5-10mm), and the data is read and written by the transmission of radio waves.

contactless IC card

The contactless IC card and the card reader perform read and write operations by radio waves. The communication frequency between the two is 13.56MHZ. The 13.56mhz contactless card itself is a passive card. When the reader reads and writes the card, the signal sent by the reader is composed of two parts: one part is the power signal, and the signal is received by the card, and the L/C produces an instantaneous energy to supply the chip. The other part is the command and data signals. The command chip completes the reading, modification, and storage of the data, and returns a signal to the reader to complete a read and write operation. The reader is generally composed of a single-chip microcomputer, a dedicated intelligent module and an antenna, and is equipped with a communication interface with a PC, a print port, an I/O port, etc., so as to be applied to different fields.

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