UHF RFID technology is currently one of the most active technical fields of radio frequency identification technology. Compared with low-frequency and high-frequency RFID, UHF RFID has the following characteristics:
Compared with low-frequency and high-frequency transponders, UHF RFID transponders working in the UHF band should have a longer read-write distance, usually greater than 1m. With the wide application of active transponders, the reading and writing distance has further expanded. Due to the long read and write distance, RFID technology has been widely used in logistics, supply chain management, access control and other fields.
In the ultra-high frequency band, the size of the antenna of the transponder is small, and the miniaturization and miniaturization of the antenna have become the focus and difficulty of ensuring the technical performance of the transponder, and have spawned many new technologies for antenna design and manufacturing.
In the UHF frequency range, due to the long working distance, the number of transponders that may occur simultaneously in the effective working range of a reader will increase, so it must have a fast and effective ability to handle collisions. In addition, in some applications, the situation of dense readers will occur, so the problem of mutual interference between readers also requires better countermeasures.
Post time: 2020-03-24