| 摘要: |
| 针对射频识别标签天线小型化、抗金属环境的实际需求,提出了一种可应用于金属环境的超高频射频识别标签天线。通过在矩形贴片上开槽来实现小型化，天线总尺寸为56 mm×50 mm×1.6 mm。通过改变槽的尺寸调节标签天线的输入阻抗，结合等效电路图分析抗金属标签天线的设计过程，从而方便地实现与标签芯片的共轭匹配。实验结果表明，实测和仿真结果比较吻合，标签阻抗匹配良好，实测最大读取距离达3.1 m。与其他标签天线相比，该天线具有结构简单、成本低、易于实现和读取距离远等优势。 |
| 关键词: 射频识别 抗金属标签天线 超高频 共轭匹配 |
| DOI： |
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| 基金项目:国家自然科学基金资助项目（61308019）;广东省自然科学基金资助项目（S2013010013261） |
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| Design of a miniaturized UHF RFID anti-metal tag antenna |
| HAN Tao,ZHANG Mingjun,WANG Hongcheng,LI Xiuping |
| () |
| Abstract: |
| According to the actual demand of miniaturization anti-metal environment for the radio frequency identification(RFID) tag antenna,an ultra high frequency(UHF) RFID tag antenna for metallic objects is presented. By etching slots on the rectangular patch,the proposed antenna is miniaturized to a total size of 56 mm×50 mm×1.6 mm. The input impedance can be adjusted effectively by changing the sizes of the slots,the equivalent circuit model is given out to explicate how this antenna functions，then the impedance match between the antenna and the tag chip can be tuned conveniently. As an experimental demonstration,the measured curve of the input impedance is basically the same as the simulated and the reading distance reaches 3.1 m. The tag antenna has the advantages of simple structure,low cost,easy fabrication and long reading distance. |
| Key words: radio frequency identification（RFID） anti-metal tag antenna ultra-high frequency impedance match |
《电讯技术》编辑部 