用于手术剪的超高频无源小型化RFID标签天线设计

Design of an UHF Passive Miniaturized RFID Tag Antenna for Surgical Sciessors

为了加强对医疗器械的跟踪管理,尤其是对手术前后手术剪数量的有效监测,设计了一款可应用于手术剪的超高频(UHF)无源小型化射频识别(RFID)标签天线。该标签天线采用集总元件加载技术以及短路技术方法实现了天线的小型化设计。通过对电容容值以及天线结构尺寸的调整,可实现对标签天线谐振频率以及标签天线特性阻抗的调节。标签天线结构参数经仿真优化,最终设计尺寸为6 mm×3 mm×1 mm。标签嵌入手术剪中的最大读取距离为1.2 m。根据仿真结果对天线加工并对实物进行测试,测试结果与仿真结果吻合较好。

To track and manage the medical devices,an UHF passive miniaturized RFID tag antenna applied to surgical scissors is proposed to monitor the number of surgical scissors before and after surgery.The tag antenna adopts the lumped element loading technology and shorted-circuit technology to reduce the size of the antenna.By changing the capacitance value and the dimension of the structure,the resonant frequency and the characteristic impedance of the tag antenna can be adjusted.After optimization,the final size of the proposed antenna is 6 mm×3 mm×1 mm.The maximum reading distance of the tag embedded in the surgical scissors is 1.2 m.The proposed antenna is fabricated and measured.The simulation and measurement results are in good agreement.