弯折线偶极子射频识别标签天线设计方法研究

摘要

Meander line dipole antennas (MDA) are useful as radio frequency identification (RFID) tag antennas because of their relatively high radiation efficiency and small size. A method has been proposed recently to obtain the resonant frequency of a MDA by calculating its inductance. According to this method, the resonant characteristics of MDA can be calculated by their physical dimensions. However, this method has several disadvantages in estimating the MDA applied for RFID tag antennas. Therefore, a modified method is proposed against these disadvantages and aims to design the MDA for RFID tags. The simulation and experiment results demonstrate that the modified method is capable of designing the MDA for RFID tags effectively and efficiently.%由于弯折线偶极子天线具有体积小,辐射效率相对较高等优点,常常被用来设计射频识别标签天线.提出了一种通过弯折线偶极子天线尺寸计算其电感值,从而间接求解谐振频率的方法,分析了设计一般弯折线偶极子天线尤其是应用于射频识别标签的弯折线偶极子天线的局限性,辐射效率低.针对上述问题,提出了改进方法.并利用仿真软件和实验对此改进方法进行验证.仿真及实验结果表明,改进后的计算方法能够跟据已知的谐振频率设计出相应的弯折线偶极子标签天线外形,从而简化了设计步骤,缩短了设计周期,提高天线的效率和准确性.