边射波束和锥状波束可重构的微带贴片天线  

A Pattern Reconfigurable Microstrip Patch Antenna with Broadside and Conical Beams

作　　者：朱丽婷 郭欣 吴文[1] ZHU Liting;GUO Xin;WU Wen(School of Electronic and Optical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学电子工程与光电技术学院,南京210094

出　　处：《微波学报》2024年第1期1-6,共6页Journal of Microwaves

基　　金：国家自然科学基金(62071235,61801223)。

摘　　要：本文提出了一种边射波束和锥状波束可重构的新型微带贴片天线,该天线在锥状波束模式下具有圆度较好、锥角可设计的优点。首先,在贴片的中间引入一排短路孔,当短路孔两侧的探针反相馈电时,贴片上两侧电流同向,辐射边射波束;而当两个探针同相馈电时,贴片上两侧电流反向,辐射锥状波束。接着,对短路排孔与贴片边缘之间的间距进行了优化设计,调整电流分布,从而改善锥状波束在方位面上的圆度。最后,在贴片的对角线上额外引入了四个短路孔,通过控制其位置和大小来调节固定频率下贴片的尺寸,从而设计出不同锥角的锥状波束。通过全波仿真,设计了三个边射波束和锥状波束可切换的贴片,锥状波束的锥角分别为55°、50°和45°,均具有较好的圆度。In this article,a novel microstrip patch antenna with reconfigurable patterns of broadside and conical beams is presented,which has low gain variation in azimuth plane and designable pointing angles in the mode of the conical beam.First,a row of shorting posts is introduced at the center of a patch antenna.When the two feeding probes at both sides of the shorting posts are out-of-phase,the current on patch is in the same direction,and thus a broadside beam is radiated.When the two feeding probes are in-phase,the current on patch has opposite directions,and thus a conical beam is radiated.Next,the spacing between the row of shorting posts and the edge of the patch is optimized to adjust the current distribution,so that the gain variation of the conical beam in azimuth plane is reduced.Finally,four additional shorting posts are added in the diagonal direction of the patch.By controlling the position and the size of these posts,the physical size of the patch in one designated frequency could be tuned.In this way,conical beams with different pointing angles are obtained.Through full-wave simulation,three patches with switchable broadside and conical beams are displayed.The beam-pointing angles of the conical beams are designed as 55°,50°,and 45°with small gain variation in azimuth plane,respectively.

关 键 词：微带贴片天线 方向图可重构 锥状波束 边射波束 

分 类 号：TN820[电子电信—信息与通信工程]