What substances may affect the performance of rfid uhf tag?
The energy reflected by the metal behind will cause interference between the RFID uhf tag and the RFID UHF reader. Therefore, the use of RFID in environments with a lot of metal substances will cause a very clear reduction in RFID read and write rates, read and write distances, and reliability. All of these require reasonable system design and operation to overcome interference.
Liquid, RFID radio frequency identification signals in the ultra-high frequency band, in addition to being reflected by metal, may also be absorbed by water.
For example, our human body is an excellent barrier for RFID radio frequency signals because our body has a lot of saline. The interference from metals has also disturbed the RFID radio frequency signals, which has become a major challenge for RFID radio frequency identification supply chain management, especially the operating environment with more metal and liquid components.
The RFID radio frequency reader antenna has the function of absorbing the energy of RFID, and the metal will cause eddy current around the RFID electronic tag reader, thereby reducing the overall efficiency of the RFID electromagnetic field. These eddy currents also cause their own magnetic fields perpendicular to the metal surface, and these vertical magnetic fields make the reader area effective.