1. Overview

Near Field Communication (NFC) is a short-line wireless transmission technology that allows two systems to communicate without contact or within a very short line. Based on high-frequency electromagnetic waves, NFC technology generally works at a frequency of 13.56mHz, with high reliability and convenience. It is widely used in mobile payment, data transmission, access control systems and other fields.

  1. Principle and application

The working principle of NFC technology is based on inductive coupling and radio frequency identification technology. When two NFC devices are close to each other, a magnetic field will be established between them to communicate based on inductive coupling. NFC devices are generally divided into active and passive devices. Active devices are generally devices that actively initiate communication, such as smartphones and readers, while passive devices are devices that passively receive and respond, such as NFC signs, door cards, etc. The active device pushes the activation signal to the passive device, and the passive device responds to the information after receiving the signal.

And establish communication connection. This type of closed-loop communication method ensures the security of NFC. At the same time, NFC communication distance is short and difficult to be monitored or affected in real time.

NFC technology mainly includes three working modes: read and write mode, card simulation mode and point-to-point mode. In the read-write mode, the NFC device can load the information in the NFC authentication or smart card to realize data transmission and identification functions; in the card simulation mode, the NFC device can simulate a smart card, allowing another person to type in its information; in the peer-to-peer mode, 2 NFC devices can directly transmit data to achieve fast file transfer or payment functions.

Among NFC technology usage scenarios, the most common one is mobile payment. Users can pay by bringing their NFC-enabled mobile phone close to the POS machine to achieve an efficient and convenient payment experience. In addition, NFC is also used in public transportation, access control systems, smart homes and other fields, bringing more convenience to people's lives.

  1. Advantages and Disadvantages


① Convenience: NFC technology can realize contactless communication. You only need to be close to the device to transmit data or interact. The operation is simple and convenient, improving customer experience.

② Rapidity: NFC has fast communication speed and fast data transmission. It is suitable for photos that require quick exchange of information, such as mobile payment, file transfer, etc.

③Security: NFC communication distance is short and cannot be monitored or affected in real time. This improves communication security and can be used in scenarios with high security requirements, such as mobile payment.

④Market prospects: NFC technology is widely used in mobile payment, smart access control, smart home and other fields, bringing more convenience and smart experience to people's lives.

⑤Interoperability: NFC technology standards are unified, and devices produced by different manufacturers can be compatible with each other, improving the interoperability and interoperability between devices.


①Short communication distance: The communication distance of NFC technology is generally between a few centimeters and tens of centimeters, which limits its application in some long-distance communication scenarios.

②Restricted application scenarios: NFC technology is mainly suitable for short-distance communication and data exchange. For some scenarios that require long-distance communication or big data transmission, NFC is not suitable.

③Security challenges: Although NFC communication has a short distance and is difficult to be eavesdropped, there are still certain security risks under certain circumstances, such as data being tampered with or forged.

④Device compatibility: Although NFC technology standards are unified, in actual applications, devices produced by different manufacturers may have compatibility issues, resulting in normal communication between devices.

In general, NFC technology realizes fast data transmission and interaction between devices through short-distance wireless communication. It is safe and convenient and brings many conveniences to modern life. With the continuous development of technology, NFC technology will be applied in more fields, bringing more convenience and intelligent experience to people's lives.