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首页> 外文期刊>International journal of communication systems >Reconfigurable broadband printed monopole antenna for portable smart IoT applications
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Reconfigurable broadband printed monopole antenna for portable smart IoT applications

机译：用于便携式智能物联网应用程序的可重新配置宽带印刷单极天线

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摘要

The proposed work presents a design of a smart printed monopole antenna separated from a Hexagonal Matching Load (HML) with an air gap. The patch is fed by a coplanar waveguide, while the HML is connected to the ground plane through two pin diodes to realize antenna reconfiguration through controlling the surface current motion. The antenna structure is mounted on FR-4 epoxy substrate with size of 23 mm x 30 mm to fit the portable devices. After running four different switching scenarios, an observable change in the antenna performance is demonstrated. The proposed antenna provides a gain of 3.1 dBi at 2.45 GHz when the two diodes are switched ON. However, the antenna gain is changed to 1.6 dBi when the two diodes are set OFF. It is demonstrated that the proposed technique shows an effective approach to control the antenna performance without the need for DC blocking capacitor for RF choke. Nevertheless, the Specific Absorption Rate (SAR) effects are evaluated with respect to the human head tissues for all considered scenarios. Finally, the antenna radiation leakages to the human body are also tested numerically and experimentally for validation.
机译：所提出的工作介绍了与六边形匹配负载（HML）分开的智能印刷单极天线，具有气隙。贴片由共面波导馈送，而HML通过两个引脚二极管连接到接地平面以通过控制表面电流运动来实现天线重新配置。天线结构安装在FR-4环氧基板上，尺寸为23mm×30mm以适合便携式设备。在运行四种不同的切换方案之后，证明了天线性能的可观察变化。当两个二极管接通时，所提出的天线在2.45GHz下提供3.1 dBi的增益。但是，当两个二极管出现时，天线增益将改变为1.6 dBi。证明所提出的技术显示了控制天线性能的有效方法，而无需用于RF扼流圈的直流阻挡电容器。然而，针对所有被认为的情景的人头组织评估了比吸收率（SAR）效应。最后，对人体的天线辐射泄漏也在数字上和实验上进行测试以进行验证。

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