摘要
传统的阅读器天线存在尺寸大、与标签之间的识别距离近等缺点,为此,采用分形理论和HFSS软件构建了新型的天线模型。具体实现方法是在天线辐射贴片的中心和四个角上开大小相同的方孔、地板上开四个槽,同轴馈电点设置在模型的对角线上。仿真结果表明,天线的各项指标均满足超高频频段的标准,实现了天线的小型化设计;识别距离达7.16 m,适用于煤矿井下人员定位系统。
The traditional reader antenna features large size and short identification distance between lags. Therefore the new antenna model is built by adopting fractal theory and HFSS software. On the antenna radiation patch, square holes with same size are cut out in the centre and at four comers, four slots are cut on the floor, and coaxial feeder points are set on the diagonal of the model. The results of simulation show that all the indexes of the antenna meet the standard on UHF frequency band, and the miniaturization is implemented. The identification distance is up to 7.16 meters, suitable for coalmine underground personnel positioning system.
出处
《自动化仪表》
CAS
北大核心
2014年第1期63-66,共4页
Process Automation Instrumentation
基金
河北省科技计划基金资助项目(编号:12276906D)
关键词
超高频
分形天线
RFID
敏感度
识别距离
Ultra high frequency （UHF） Fractal antenna Radio frequency identification （ RFID } Sensitivity Identification distance
