What is the core of RFID technology?cat microchip Dealer

　　What is the core of RFID technology?

　　chip

　　The chip is undoubtedly one of the core technologies in most electronic information products.

　　RFID chip is divided into tag chip and reader chip. Take the tag chip as an example. It integrates all circuits except the tag antenna and matching line, including modules such as radio frequency front-end, analog front-end, digital baseband, and memory unit. The basic requirements for the chip are light, thin, small, high stability and low price.

　　In China, local manufacturers have the ability to develop and produce low-frequency and high-frequency chips on their own. They have also achieved certain results in small size and low power consumption, and the price has a price advantage of more than 30% compared with foreign manufacturers.

　　It is understood that the current domestic RFID chip manufacturers that can independently research and develop and have put into production include Shanghai Fudan Microelectronics, Yuanwanggu, Juchen Semiconductor and so on.

　　The development trend of RFID chip design and manufacturing technology will still be lower power consumption, longer distance, faster reading and writing speed, higher reliability and security, and continuous cost reduction. For domestic RFID chip manufacturers, the most important thing is stability, including the production process that needs to be improved.

　　antenna

　　is the carrier of signal transmission, and the importance of the antenna is self-evident. Antennas are also divided into tag antennas and reader antennas.

　　Depending on the application, RFID tags may need to be affixed to objects of different types and shapes, or even need to be embedded inside the objects. In addition, the tag antenna and the reader/writer antenna also assume the role of receiving energy and transmitting energy, respectively. These factors put forward strict requirements on the design of the antenna.

　　The goal of the antenna is to transmit the maximum energy in and out of the tag chip. This requires careful design of the matching between the antenna and the free space and the tag chip connected to it. Assuming it is used in retail goods, if the frequency bands are 435MHz, 2.45GHz and 5.8GHz,

　　Then the antenna must be small enough to be able to be attached to the object; it has omnidirectional or hemispherical coverage directionality; it provides the largest possible signal to the tag chip; no matter what direction the object is, the polarization of the antenna can be The interrogation signal of the reader is matched; it is robust;

　　With the above requirements, the cost should be low enough in the end.

　　Six advantages of RFID technology 1. No need to be visualized or read in batches. A large number of RFID tags can be read by the reader at the same time, quickly and in batches, and hundreds or even thousands of tags can be read at a time. It can also identify high-speed, moving objects, such as trains, buses, etc.

　　2. High capacity, electronic tags can store more information, such as production date, storage date, etc., and can be rewritten and reused repeatedly. The read data is also uploaded to the system for processing in real time, and the product can be traced to the source.

　　3, the reading distance is long, according to the power of the reader and the gain rate of the antenna, the reading distance can range from tens of centimeters to several meters;

　　4. Global uniqueness and cannot be copied. Each RFID tag is unique. In the process of producing the label, the label has been bound to the product information, so in the subsequent product circulation and use process, this label is the only representative The corresponding item.

　　5. Long shelf life RFID tags have the characteristics of waterproof, anti-magnetic, anti-corrosion and high temperature resistance. Such as the laundry industry, animal breeding industry, medical industry, etc., all have higher requirements for label durability. At present, the general label storage time can reach several years, ten years or even decades.

　　6. One of the core technologies of high-security RFID tags is the chip. It is well known that the development of chips is difficult and expensive. For counterfeiters, the cost of copying is too high, and it is difficult to break through technical barriers. In addition, the electronic tag has a reliable security encryption mechanism, and my country's second-generation resident ID card also uses RFID technology.

　　Conclusion: RFID, as one of the key technologies of the Internet of Things, has received more and more attention in recent years, and for the control of item management and labor costs by enterprises, RFID will surely be widely adopted in all walks of life. As a global manufacturing base, China already has the world’s largest RFID application market. It is believed that in the future, the government will promote, standardization and cost reduction. With the application of new outlets for unmanned retail, it will bring a rapid growth in RFID. opportunity.

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