一种方向图可重构单极子天线设计  

Design of a Pattern Reconfigurable Monopole Antenna

作　　者：秦世川 李荣强[1] QIN Shichuan;LI Rongqiang(College of Electronical Engineering,Chengdu University of Information Technology,Chengdu 610225,China)

机构地区：[1]成都信息工程大学电子工程学院,四川成都610225

出　　处：《成都信息工程大学学报》2024年第1期18-22,共5页Journal of Chengdu University of Information Technology

基　　金：四川省科技厅重点研发资助项目(2022YFS0033)。

摘　　要：提出一种新的方向图可重构单极子天线。该天线由一个矩形单极子和两组寄生条带组成,寄生带由类似于“2”和“5”字型的曲折条带组成,在左右两边寄生带中各加入一个PIN二极管。通过打开或关闭相应的PIN二极管,寄生带表面电流将发生变化,从而改变天线的方向图。天线可获得3种不同的可重构模式,包括一个双向模式(±X方向)和两个定向模式(+X方向或-X方向)。结果表明,3种模式下天线的带宽分别为2.26~2.64 GHz,2.12~2.64 GHz,2.13~2.64 GHz,其重叠带宽为2.26~2.64 GHz,相对带宽为15.5%;3种模式下天线的带内最低辐射效率分别为90%,91%,91%,均能达到90%以上。测试的带宽分别为2.22~2.65 GHz,2.12~2.59 GHz,2.13~2.60 GHz,与仿真结果基本一致。所提出的天线具有小型化、高效率、结构简单等优点。In this paper,a novel pattern reconfigurable monopole antenna is presented.The antenna consists of a rectangular monopole and two sets of parasitic strips.The parasitic strips consist of zigzag strips similar to the"2"and"5".Two PIN diodes are integrated into the left and right sides of the parasitic strips.By controlling the on/off states of the corresponding PIN diode,the parasitic strips'surface current will change,thus changing the antenna pattern.The antenna can acquire three different reconfigurable modes,including a bidirectional mode(±X direction)and two directional modes(+X direction or-X direction).The results show that the antenna bandwidths of the three reconfigurable modes are 2.26~2.64 GHz,2.12~2.64 GHz,2.13~2.64 GHz,respectively.The overlapping bandwidth is 2.26~2.64 GHz,representing a relative bandwidth of 15.5%.The minimum in-band radiation efficiency of the antenna in the three modes is 90%,91%and 91%respectively,all of which can reach more than 90%.The measured bandwidths are2.22~2.65 GHz,2.12~2.59 GHz,and 2.13~2.60 GHz,respectively,which are basically consistent with the simulation results.The proposed antenna has the advantages of miniaturization,high efficiency and simple structure.

关 键 词：可重构天线 单极子 PIN二极管 

分 类 号：TN713.5[电子电信—电路与系统]