1. Overview of traditional EAS systems With the continuous improvement of people’s living standards and the continuous evolution of lifestyles towards leisure and comfort, in shopping malls, bookstores, libraries and other occasions, open-shelf sales and open-shelf borrowing have become the main means for people to shop and borrow. It serves as a major means to improve service quality and economic benefits. But the ensuing problem is: the loss of goods and books has become a headache for merchants, which seriously damages the interests of merchants, makes the profits of merchants lose in vain, and even leads to the closure of…

Electronic tags working in different frequency bands or frequency points have different characteristics. This article introduces the characteristics of different working frequencies of RFID and the main application fields in detail. For an RFID system, its frequency band concept refers to the frequency range of tag signals sent, received and read by the reader through the antenna. From the concept of application, the working frequency of the radio frequency tag is also the working frequency of the radio frequency identification system, which directly determines the characteristics of all aspects of the system application. In the RFID system, the system works…

With the development of the economy and the improvement of living standards, people’s demand for fresh food has increased, and people have paid more attention to the quality and safety of food. The increase in demand has promoted the development of the cold chain logistics industry, and the requirements for quality and safety have promoted the development and application of new technologies. As an automatic identification and data acquisition technology, RFID technology can track the cold chain process and monitor temperature changes when it is integrated with a temperature sensor. The automatic acquisition of data simplifies the logistics operation process…

In actual design, the real practical trick is how to trade off these guidelines and laws when they cannot be accurately implemented due to various design constraints. Of course, there are many important RF design topics worth discussing, including impedance and impedance matching, insulating layer materials and laminates, wavelength and standing waves, etc. Careful planning under the premise of a comprehensive grasp of various design principles is the guarantee of a successful design the first time . 1. Common problems in RF circuit design 1. Interference between digital circuit modules and analog circuit modules If the analog circuit (RF) and…

Radio frequency identification technology is a non-contact automatic identification technology. It is a short-distance wireless communication system composed of electronic tags (Tag/Transponder), readers (Reader/Interrogator) and middleware (Middle-Ware). The tag in radio frequency identification is a combination of radio frequency identification tag chip and tag antenna. Tags are divided into active tags and passive tags according to their working modes. The active tag itself carries a battery to provide it with the energy required for the reader to communicate; the passive tag uses the inductive coupling or backscattering working mode, that is, the electromagnetic field or electromagnetic wave emitted by the…

RFID is a general term for radio frequency identification technology, which is the same as other identification methods such as barcodes and IC cards. Its basic function is to identify the unique identifier (UID) of the target item. The difference is that it uses radio frequency transmission to complete non-contact automatic identification. , and realize the identification of moving targets and multi-targets. RFID is also a data communication technology. It has the basic functions of the basic components of the communication system, such as sending, receiving and channeling, and transmitting information. The difference is that the information it transmits is…