适用于物联网多频段通信的矩形微带天线设计

摘要

In order to meet the application requirements of the mainstream in Internet of things communication tech-nology,a new type of rectangular micro-strip monopole antenna is proposed,which is suitable for multi band communi-cation, such as radio frequency identification, global positioning system and wireless local area network. The rectangular micro-strip antenna is composed of a rectangular patch with two U shaped slots and a ground surface with two rectangular slots. The antenna has four working frequency,when the resonant frequency is 1.22 GHz,2.47 GHz, 3.61 GHz and 5.60 GHz,the relative bandwidth is 25.7%(1.12 GHz~1.45 GHz),25.3%(2.24 GHz~2.89 GHz), 15.7%(3.40 GHz~3.98 GHz)and 13.6%(5.21 GHz~5.97GHz). Simulation and experimental results show that the number of working bands of the antenna is more wide and the relative bandwidth is higher.%为满足主流物联网通信技术的应用需求,提出一种新型的矩形微带单极天线,适用于多频段通信,如射频识别、全球定位系统和无线局域网等.该矩形微带天线由一个带两个U形槽的矩形贴片和一个带两个长方形槽的接地面组成,具有4个工作频段,当谐振频率分别为1.22 GHz,2.47 GHz,3.61 GHz和5.60 GHz时,相对带宽为25.7%(1.12 GHz~1.45 GHz)、25.3%(2.24 GHz~2.89 GHz)、15.7%(3.40 GHz~3.98 GHz)以及13.6%(5.21 GHz~5.97GHz).仿真与实测结果显示,该天线的工作频段数量更多且相对带宽更高,在各工作频段内具有良好的全向辐射特性.