RFID Antenna research progress

An important component in the development of RFID technology is the research on RFID system antennas. Over the years, RFID system antennas have made great progress with the advancement of RFID technology. Low-frequency and high-frequency (typically 1356MH2) RFID Antenna technologies have been developed for a long time and are relatively mature. At present, the fastest development of RFID system antennas is in the ultra-high frequency band (especially 860MHz~960MHz), and the signal interference caused by various different products at the two frequency points of 2.45GHz and 58GHz in the ISM band is very strong, which determines The research on RFID system antennas in the microwave frequency band is very difficult, and its research and application still require a deep theoretical foundation.

Research on RFID system antennas has achieved many important achievements. The size of the reader-writer antenna is gradually decreasing, and its gain performance and operating frequency band are constantly expanding. These are of particular importance to the increase in the reading and writing distance and the enhancement of compatibility; electronic tag antennas have attracted attention in production due to Ink printing technology has greatly reduced costs and is easy to mass produce. Tag antennas with better performance are being vigorously developed, and some products have emerged.

After years of difficult development, the great progress made by RFID system antennas is obvious to all, but there are still difficulties that need to be solved. First of all, in the process of miniaturization of RFID systems, the design of RFID system antennas poses great challenges. Whether it is a reader antenna or an electronic tag antenna, its volume always determines the size of the entire system. Changes other than the reader antenna In addition to the use of microstrip antennas, electronic tag antennas have also made corresponding changes in antennas and other aspects; secondly, the cost of the antenna. In order to reduce the size of the reader antenna, one of the methods is to improve the medium with a specific dielectric constant. , but the cost of this medium is high; finally, electronic tag antennas need to be used in large quantities in applications, so their costs still need to be further reduced. The further development of RFID systems will move towards specific application scenarios, and these scenarios require specific antennas to match them. This requires that system antennas must be specialized for specific scenarios, such as metal surfaces, liquids, etc.

All in all, RFID system antennas face great technical challenges in terms of miniaturization, high radiation efficiency, high gain, low cost, and strong anti-interference ability.