基于多环结构的八模态涡旋波微带天线

Eight-mode OAM microstrip antenna based on multi-ring structure

介绍了一种多模态涡旋电磁波单元天线设计方法.利用四个同心短路圆环微带贴片产生八模态的涡旋电磁波波束.该单元天线结构简单,尺寸小.仿真与实验结果表明,八个模态(l=±1,±2,±3,±4)均拥有良好的涡旋相位特性,相应阶数的单元增益分别为4.8 dBi,4.1 dBi,5.1 dBi,5.3 dBi,各模态的阻抗带宽均大于100MHz.该天线为多模涡旋电磁波应用提供了一种新的可能.

This paper presents a multi-mode orbital angular momentum（OAM） wave element antenna design. These eight-mode OAM beams are generated simultaneously using four concentric shorted annular ring microstrip patches, and the antenna is simple in structure and small in size. Simulation and test re- sults show that eight modes （l=± 1,± 2, ± 3, ± 4） have good vortex phase characteristics. Mean- while, the element gains of corresponding modes are 4.8 dBi, 4.1 dBi, 5.1 dBi, and 5.3 dBi, respectively, and the impedance bandwidth of all modes are greater than 100 MHz. It can provide a new possibility for future multi-mode OAM wave applications.