小型化UHF弯折偶极子抗金属RFID标签天线的设计

Miniaturized Folded Dipole Anti-metal UHF RFID Tag Antenna Design

设计了一款可用于金属物体的超高频(UHF)射频识别(RFID)标签天线,该天线采用弯折偶极子的形式,辐射单元位于厚度仅0.508mm的Rogers 5880基片上,并且在馈电点两边使用两个对称的短路探针来达到小型化的目的。通过调整短路探针的位置和半径可以获得不同的频率响应。通过加工测试获得的该天线的数据与设计仿真结果比较符合,并且对该天线的用于非金属物体和金属物体时的阅读距离等参数作了实际测试。

A novel folded dipole type microstrip patch antenna, designed for ultrahigh frequency （UHF） band radio frequency identification （RFID） tag is presented in this paper, which can be used on metallic objects. The presented anten- na is fabricated on a very thin Rogers 5880 substrate with a thickness of 0. 508 mm. The structure consists of meandered di- pole and two symmetrical shorting pins placed at both sides of feed point. The purpose of shorting pins is to miniaturize the tag. An adjustable frequency response can be easy obtained via modify the location and radius of the pins. The antenna is an- alyzed by full wave simulations. The impedance measured and range readout are provided for the manufactured prototype, simulation results are presented which are in good agreement with the measurement data.