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随着射频识别技术研究的迅速发展,寻求具有尺寸缩减特性的天线结构成为RFID设计的实际需要,Hilbert分形结构是天线小型化设计的一种有效解决方案。本文论述了Hil-bert分形天线的基本原理,对弯折偶极子天线采用Hilbert分形结构进行小型化设计,并对实物进行仿真。经测试与仿真后结果表明:标签天线尺寸约为25.6mm*16.2mm,工作在中心频率915MHz处,增益达到2.19dB,相对阻抗带宽为90MHz。天线能保持较好的工作性能,可应用于酒瓶盖防伪RFID标签中。
With the rapid development of research on radio frequency identification technology, it is an actual need to find an antenna structure with a size reduction characteristic for the RFID design. The Hilbert fractal structure is an effective solution to the antenna miniaturization design. This paper discusses the basic principle of the Hilbert beagles, and uses the Hilbert fractal structure to design the bent dipole antenna. The physical simulation is carried out. After the test and simulation results show that: the size of the tag antenna is about 25.6mm * 16.2mm, working at the center frequency of 915MHz, gain of 2.19dB, the relative impedance bandwidth of 90MHz. Antenna can maintain good performance, can be applied to anti-counterfeit labels RFID tags.