| 摘要 |
A UHF RFID tag can solve the conventional tag-reading problem occurring when an RFID tag is attached to a metallic or liquid object. The UHF RFID tag comprises: a tag, a foamed layer, and a magnetic layer. The foamed layer is a foamed polymeric material having a density of 10-100 kg/m3 and a permittivity of 1-1.5. The foamed layer is joined to the tag. The magnetic layer is joined to another side of the foamed layer, has a magnetic permeability of 2-10 and a thickness of 0.1-3 mm, and consists of a magnetic powder and a rubber/plastic material, wherein the magnetic powder has a weight percent of 65-95%; the rubber/plastic material has a weight percent of 5-35%; the particles of the magnetic powder have a shape of a platelet, lens or spheroid. The magnetic layer/foamed layer may be a single-layer structure, a multi-layer structure, or a single-layer structure having a gradient density.
|
