| 摘要 |
A printed radio frequency sensor structure comprises a substrate, an antenna arranged on the substrate, and a protection layer covering the antenna. Sensing materials may be mixed into the conductive ink/glue used to print the antenna. The method of forming the RFID tag involves drying, curing and compressing the conductive ink and sensing material mixture to form the antenna. An integrated circuit (IC, chip) is bonded to the antenna and a protective coating is applied over the RFID. The conductor in the conductive ink may be a metal, carbon, a conductive polymer or a mixture thereof. The sensing material may be a metal, carbon, a polymer, an organically modified species or a mixture thereof. The RFID tag may be used to detect gasses such as volatile organic compounds, toxic industrial chemicals, explosive gasses or chemical warfare agents. The sensing material may cause changes to the impedance of the antenna when exposed to such gasses. |
