Does rfid work through metal? Traditional RFID tags will fail to read or write, have shorter distances, or have signal confusion on metal surfaces. This is because metal reflects or absorbs RF signals, causing the performance of the tag antenna to fail. This effect is particularly significant in the UHF band (such as 902–928MHz).
Why does a metal environment interfere with RFID?
Reflecting RF signals: Metal reflects electromagnetic waves like a mirror, disrupting the communication between the tag and the reader.
Absorbing energy: In some cases, metal also absorbs RF energy, causing signal attenuation.
Antenna detuning: The metal surface changes the impedance of the antenna and affects the resonant frequency of the tag.
Solution: Metal-specific RFID tags
To overcome this problem, our company has launched tags designed specifically for metal environments. These tags have the following features:
Isolation material: Add an isolation layer between the antenna and the metal to effectively prevent signal interference.
Directional antenna design: Optimize the RF path design to ensure that the tag can transmit signals outward.
Industrial packaging: Some tags are packaged with ABS material, which is durable and suitable for harsh environments.
