RFID card is an automatic identification technology card that uses radio waves for contactless data transmission. It mainly consists of two parts: a chip and an antenna. The chip is embedded with a unique identification code, and the antenna is responsible for receiving and sending radio waves. When the RFID card enters the recognition range of the reader, the reader will emit specific radio waves, activate the antenna on the card and generate current, thereby waking up the chip and transmitting the stored identification code to the reader. RFID cards are widely used in access control systems, public transportation, logistics management, medical and other fields. NFC card, the full name is Near Field Communication Card, that is, near field communication card. It is a smart card integrated with NFC technology, which communicates and exchanges data with devices within a short distance through radio electromagnetic waves. NFC technology has evolved from the integration of contactless radio frequency identification (RFID) and interconnection technology, and has the characteristics of short distance, high bandwidth and low energy consumption. NFC cards are usually used in scenes such as access control, bus cards, mobile payments, etc., and can realize a variety of applications such as consumption and access control, such as mobile payment, electronic ticketing, anti-counterfeiting, etc.
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