Development opportunities and challenges of RFID

RFID technology has huge commercial potential in terms of products and services. It will occupy a very high share of the market in the future and may generate profits of more than 10 billion US dollars. In addition, the rise of RFID will drive the development of a whole set of industrial chains, placing huge demands on the construction of the Internet of Things, storage devices and database management Tools, data mining, technical support, electronic terminal equipment and other related facilities. It is certain that RFID will enter the historical stage and bring about the prosperity and development of the technical market. The software and hardware equipment of RFID products are in the research and development stage. Many high-tech companies or enterprises are making great efforts to promote RFID products, including the famous MicrosoftIntelSUN and other companies. It is foreseeable that RFID technology will set off an international technology research boom. China's radio frequency identification technology field also has a large number of development opportunities and market expectations. It is undeniable that widespread technological changes will come rapidly with the advancement of radio frequency identification technology and product applications. Although the prospects are bright, my country's research time in the field of radio frequency identification technology is much shorter than that of other developed countries. Therefore, there are many shortcomings and development needs to be accelerated. Insufficient technical research, shallow research depth, and unclear relevant standards are all difficulties that hinder the development of radio frequency identification technology in my country. In order not to lag behind the world level in this field, research on radio frequency identification technology and its applications has become an important direction of scientific research.

The antenna is a converter that converts the traveling wave of the transmission line into the electromagnetic wave in the unbounded medium (such as free space). The specific application background makes the design of the antenna in the radio frequency identification system have many problems that require in-depth research. The reader antenna needs to meet the performance of circular polarization, low proFile, simple structure, etc. In special applications, it also needs to meet the performance of multi-frequency bands, multi-polarization directions or specific directions. The tag antenna is usually limited by the size of the tag, generally Linear polarization and low gain, the trend of tag antennas is size reduction, conformal coplanarization, and improvement in resistance to metals and liquids. In addition, for specific application scenarios, developing electronic tag antennas that meet specific needs is also a difficulty and hot spot, and has broad application prospects and commercial value.

my country has just begun research on RFID system antennas in recent years, and research on dedicated RFID system antennas in specific application scenarios is even rarer, such as wine anti-counterfeiting, labels on the surface of metal objects, and labels in solutions. In addition, in terms of technology, the reader-writers, tags and other equipment products of enterprises in the field of radio frequency identification technology in my country basically focus on the low-frequency band (LF.125kHz~134.2kHz) and high-frequency band (HF, 125MHz~34,56MHz). These The technology takes a long time to develop and is relatively easy to operate. Therefore, there are many types of products and the competition is very fierce. However, the research on the high-tech ultra-high frequency band (UHF, 860MHz~960MHz) is still shallow and the foundation is weak. Our country's low- and high-frequency system antenna design is relatively mature, but in the ultra-high frequency band, there is still a big gap between it and foreign advanced levels. In low-, high- and ultra-high-frequency bands, the principles and designs of antennas are essentially different. Systems in low- and high-frequency bands mainly work in the near-field area, where there is no electromagnetic wave propagation. The ultra-high frequency band and microwave band have electromagnetic wave transmission. Therefore, it has become very urgent to design and research high-performance tag antennas for RFID systems in the ultra-high frequency band and microwave band. Studying the Engineering design and application of tag antennas and reader antennas (circularly polarized antennas) for RFID systems in the ultra-high frequency band plays a very important role in the development of the Internet of Things in my country.