User's Manual

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NFC user manual

 NFC introduction:

1. Theory Description:

Near field communication (NFC) is an emerging technology. Devices using NFC Technology

(such as mobile phones) can exchange data when they are close to each other. It is evolved

from the integration of contactless radio frequency identification (RFID) and interconnection

and interworking technologies. By integrating inductive card readers, inductive cards and point-

to-point communication functions on a single chip, Mobile terminals are used to realize mobile

payment, electronic ticketing, access control, mobile identity recognition, anti-counterfeiting and

other applications.

The full Chinese name of NFC is near field communication technology. NFC is developed on

the basis of non-contact radio frequency identification (RFID) technology and wireless

interconnection technology. It provides a very safe and fast communication method for various

electronic products that are becoming more and more popular in our daily life. "Near field" in

the Chinese name of NFC refers to radio waves adjacent to electromagnetic fields. Because

radio waves are actually electromagnetic waves, they follow Maxwell's equation. Electric and

magnetic fields will always alternate in energy conversion during the process of propagation

from the transmitting antenna to the receiving antenna, and enhance each other during

conversion. For example, the radio signals used by our mobile phones are propagated by using

this principle, which is called far-field communication. Within 10 wavelengths of electromagnetic

wave, the electric field and magnetic field are independent of each other. At this time, the

electric field has little significance, but the magnetic field can be used for short-distance

communication, which is called near-field communication.

The near-field communication service combines the near-field communication technology and

mobile communication technology, and realizes various functions such as electronic payment,

identity authentication, ticketing, data exchange, anti-counterfeiting, advertising and so on. It is

a new service in the field of mobile communication. The near-field communication service

enhances the function of mobile phones, makes users' consumption behavior gradually

become electronic, and establishes a new user consumption and business model.

The application of NFC technology has been widely concerned all over the world. Different roles

such as telecom operators and mobile phone manufacturers at home and abroad have carried

out application pilot projects one after another. Some international associations and

organizations have also actively carried out standardization work. According to the prediction

of relevant institutions in the industry, mobile applications based on near-field communication

technology will become the next killer application of mobile value-added services.

2. Comparison between NFC and RFID

First, the working modes are different. NFC integrates point-to-point communication function,

reader function and contactless card function into one chip, while RFID consists of reader and

tag. NFC technology can read or write, while RFID can only read and determine information.

Second, the transmission distance is different. The transmission distance of NFC is much

smaller than that of RFID. The transmission distance of NFC is only 10 cm, and the transmission

distance of RFID can reach several meters or even tens of meters. NFC is a close and private

Summary of content (4 pages)

PAGE 1
NFC user manual  NFC introduction: 1. Theory Description: Near field communication (NFC) is an emerging technology. Devices using NFC Technology (such as mobile phones) can exchange data when they are close to each other. It is evolved from the integration of contactless radio frequency identification (RFID) and interconnection and interworking technologies.
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communication mode. Compared with RFID, NFC has the characteristics of close distance, high bandwidth, low energy consumption and high security. Third, the application fields are different. NFC is more used in the field of consumer electronic devices, and plays a huge role in the fields of access control, public transport, mobile payment, etc; RFID is better at long-distance identification and is more widely used in production, logistics, tracking and asset management.
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car key with him. How do you use it? Each vehicle has its own unique NFC near-field communication password, which can be bound with a smart phone. After binding, take the smart phone to the door handle, and the door will be unlocked. When the owner enters the driver's seat, as long as the smart phone is placed on the wireless charging smart phone, the vehicle will start automatically.
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no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: -- Reorient or relocate the receiving antenna. -- Increase the separation between the equipment and receiver.