Orbital angular momentum wave generation/detection based on planar multi‐slot‐spiral circularly polarized antenna,Microwave and Optical Technology Letters

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Orbital angular momentum wave generation/detection based on planar multi‐slot‐spiral circularly polarized antenna
Microwave and Optical Technology Letters ( IF 1.0 ) Pub Date : 2021-03-30 , DOI: 10.1002/mop.32854
Ehsan Koohkan ₁ , Saughar Jarchi ₁ , Ayaz Ghorbani ₂ , Mohammad Bod ₃

Affiliation

Orbital angular momentum (OAM) as vortex wave has potential application for dense communication. A multi‐slot antenna is proposed based on Archimedean spirals to generate/detect the OAM waves. The antenna equips three radiation slots in a disk‐manner to realize three different OAM modes simultaneously. A serial‐fed microstrip array is designed for circularly polarized (CP) radiation. The lengths of the slots and microstrip lines are chosen to radiate at 3.5 GHz with 20% fractional bandwidth. So, it can identify the receiving modes of vortex wave with this mechanism. A prominent spiral phase plane is observed for the generated OAM wave. In addition, the far‐field pattern presents a doughnut‐shape beam. The whole antenna is fabricated on a 13 cm printed circuit disk board. Both the experimental and simulation results show that the proposed antenna has valuable features to produce different vortex modes.

中文翻译：

基于平面多槽螺旋圆极化天线的轨道角动量波产生/检测

作为涡旋波的轨道角动量（OAM）在密集通信中具有潜在的应用。提出了一种基于阿基米德螺线的多槽天线，以产生/检测OAM波。天线在磁盘方式中配备了三个辐射槽，可以同时实现三种不同的OAM模式。串行馈送微带阵列设计用于圆偏振（CP）辐射。选择缝隙和微带线的长度以3.5 GHz的频率以20％的分频带宽辐射。因此，利用该机制可以识别涡旋波的接收方式。对于产生的OAM波，观察到明显的螺旋相平面。此外，远场模式还呈现出一个甜甜圈形状的光束。整个天线都安装在13厘米的印刷电路板上。

更新日期：2021-05-03

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