RFID超薄抗金属标签天线设计

摘要

设计了一款UHF频段RFID超薄抗金属电子标签天线，该天线采用Koch分形结构实现小型化。天线采用FPC材料作为标签天线的介质基板，厚度仅为0.25 mm。其良好的柔韧性使其能用于有共形要求的场合。仿真和测试表明，提出的天线具有较宽的带宽（900~930 MHz）、相对高的增益（约–10.7 dB）、较高的天线效率及较大的阅读距离(约3 m)，可应用于物联网中对金属物体的管理。%An ultra-thin RFID tag antenna for ultrahigh frequency (UHF) band was proposed, which could be used on metallic object. This antenna was miniaturized by using Koch fractal structure. The antenna was fabricated on a flexible printed circuit (FPC) board with a thickness of 0.25 mm, making it to be a possible candidate in occasions with conformal requirements. Both simulated and measured results show that the antenna has the wide bandwidth(900–930 MHz), relatively high gain ( about –10.7 dB), and large reading distance (about 3 m). This kind of antenna can be used for the management of metal objects in the internet of things.