应用于感知物联网的方向图可重构超高频RFID标签天线
A Hinge-Type and Radiation-Pattern-Reconfigurable Antenna for Cognitive Internet of Things Application

作者: 徐守辉 , 邱 方 , 王子旭 :厦门信达物联科技有限公司,厦门;

关键词: 方向图辐射方向可调控“铰链型”天线感知物联网“汉字型”天线电磁带隙RFIDReconfigurable Radiation Pattern EBG Hinge-Type Antenna CIOT RFID FEM

摘要:
本论文提出了一款新颖的应用于感知物联网(CIOT, Cognitive Internet of Things)的方向图可重构的RFID (Radio Frequency Identification)超高频电子标签天线。该RFID超高频电子标签天线为应用于金属物品的偶极子天线,创新之处在于:1) RFID超高频电子标签天线采用汉字结构;2) 偶极子天线应用“铰链型”可旋转结构,在0˚~90˚范围内调控超高频电子标签天线的偶极子臂的夹角,进而实现电子标签天线的阻抗实部在0~90 ohm范围以及虚部在150~260 ohm范围内可调,方向图在边射(约0˚)和前向端射(约−90˚)范围内调控;3) 在该超高频天线偶极子臂夹角固定为某一特定角度(以60˚为例)的前提下,通过在”铰链型”天线的上层加一层介质和电磁带隙栅格结构(EBG, Electromagnetic Band-Gap)进一步调控方向图的辐射方向(以60˚夹角为例,可进一步调控30˚~40˚)。实际测试结果验证了RFID超高频电子标签天线的可翻转偶极子臂对方向图的调控性,以及EBG结构对方向图辐射方向的可调控性。本文探索了可重构天线在RFID超高频电子标签天线的延伸,尤其提出并验证了可翻转偶极子臂以及EBG对RFID超高频电子标签天线的方向图及方向图辐射方向的可调控性能。

Abstract: A hinge-type RFID (Radio Frequency Identification) chip antenna with reconfigurable radiation pattern is proposed for Cognitive Internet of Things (CIOT). As analyzed using FEM (Finite Element Method) the hinge-type structure enables the dipole antenna to be rotatable and by rotating the angle between the two antenna’s arms from 0˚ to 90˚, its radiation pattern can be reconfigured from 40˚ to −90˚ (assuming the axis vertical to ground is 0˚). Moreover, EBG (Electromagnetic Band-Gap) structure is applied to realize further reconfigurable radiation patterns. Specifically, taking 60˚ degree as an example, by tuning the size of rectangular hole of EBG, its radiation patterns could be tuned ±30˚. The reconfigurable radiation pattern is qualitatively verified by experiment using Tagformance measurement system.

文章引用: 徐守辉 , 邱 方 , 王子旭 (2014) 应用于感知物联网的方向图可重构超高频RFID标签天线。 天线学报, 3, 39-46. doi: 10.12677/JA.2014.34006

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