Communication Cards, are a type of smart card that uses near field communication technology. They utilise the principle of electromagnetic induction to achieve wireless communication and data exchange between devices over short distances (usually no more than 10 cm).

The operating frequency of NFC cards is typically 13.56MHz, with a transmission speed of up to 106kbit/s, and they feature a 16-bit CRC checksum to ensure data integrity. The reading range of NFC cards is generally between 1-5 centimetres, depending on the size of the reader and the tag antenna. さらに, the lifespan of NFC cards is usually around 10 years, with a read/write cycle of up to 100,000 times.

The main features of the NFC card include:

• Data exchange: communication and data exchange with devices over short distances by means of radio electromagnetic waves.
• Payment function: The mobile phone can be used directly as a bank card or transportation card to achieve contactless payment.
• Access control and identification: NFC cards can be used in access control systems, enabling access without the need for physical keys or cards.
• Data transmission: Devices can quickly transfer and exchange data with each other.

Public transport: The NFC card can be used as an electronic bus card, which is convenient for passengers to take buses, undergrounds and other means of transport.
Mobile Payments: Users can complete the payment by simply holding their phone close to the payment terminal, without the need to carry cash or bank cards.
Access control system: NFC cards can be used for access card emulation, enabling access without the need for physical keys or cards.
Authentication: NFC cards can be used for authentication, ensuring that only authorised users can access specific areas or systems.
Social sharing: Merchants can place NFC tags containing posters, promotional messages, and advertisements at the door of the shop, and users can instantly get relevant information by touching the NFC tag with their NFC mobile phone, and can log in to social networks to share details or good things with friends.
Anti-counterfeiting traceability: NFC cards can be used for product anti-counterfeiting, real-time verification through NFC technology to protect consumer rights.
With the continuous development of technology, NFC cards will show their unique advantages in more fields, bringing more convenience and security to people’s lives.