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基于微带天线结构,设计了一款适用于整个UHF RFID系统的新型宽带标签天线。在H型贴片上开H槽,形成了两个相近的谐振点,调整H槽的位置和大小,使两个谐振点靠近耦合,从而拓展了天线带宽。通过改变贴片底部矩形槽深度和微带线长度调整天线的输入阻抗。使用软件HFSS14.0进行仿真分析。结果表明,该天线具有很好的宽频特性(766～989 MHz,回波损耗S11<10 dB),在超高频段(840～960 MHz)内具有良好的阻抗匹配特性。
Based on the microstrip antenna structure, a new broadband tag antenna is designed for the entire UHF RFID system. Open the H groove on the H type patch, form two similar resonance points, adjust the position and size of H groove, make the two resonance points close to couple, thus has expanded the bandwidth of the aerial. Adjust the input impedance of the antenna by changing the depth of the rectangular slot at the bottom of the patch and the length of the microstrip line. Using software HFSS14.0 simulation analysis. The results show that the antenna has good broadband characteristics (766 ~ 989 MHz, S11 <10 dB return loss) and good impedance matching in the ultra high frequency range (840 ~ 960 MHz).