轨道角动量双模复用的远场增益及隔离度

doi:10.7523/j.issn.2095-6134.2021.01.017

中国科学院大学学报 ›› 2021, Vol. 38 ›› Issue (1): 137-144.DOI: 10.7523/j.issn.2095-6134.2021.01.017

• 简报 • 上一篇

轨道角动量双模复用的远场增益及隔离度

曹乐搬^1,2, 周斌¹, 卜智勇¹, 兰云¹

1. 中国科学院上海微系统与信息技术研究所, 上海 200050;
2. 中国科学院大学, 北京 100049

收稿日期:2019-06-01 修回日期:2019-10-24 发布日期:2021-03-05
通讯作者: 曹乐搬
基金资助:
上海市自然科学基金（19ZR1467200）资助

Far-field gain and isolation of orbital angular momentum dual mode multiplexing

CAO Leban^1,2, ZHOU Bin¹, BU Zhiyong¹, LAN Yun¹

1. Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China

Received:2019-06-01 Revised:2019-10-24 Published:2021-03-05

摘要/Abstract

摘要： 基于均匀圆环阵列，研究其产生的携轨道角动量(OAM，orbital angular momentum)双模复用的涡旋电磁波。首先从理论上论述均匀圆环阵列可以产生携OAM涡旋电磁波，并提出3种不同结构的均匀圆环阵列，阵元的激励设置及传输增益的计算方法；其次从均匀圆环阵列中阵元的数量、阵列的半径及阵元的排列方式3个角度分别讨论其对所产生的携OAM双模复用的涡旋电磁波在主轴方向上远场增益的影响；最后从阵元的排列方式研究OAM双模复用时的模间干扰程度。仿真结果表明，圆环阵列中阵元的数量越多，主轴上的远场增益越大；阵列的半径对主轴上的远场增益影响较小；相对于采用单一的排列方式，采用两种不同排列方式相结合的均匀圆环阵所产生的涡旋波在主轴上的远场增益更大，模间干扰程度更小。

关键词: 均匀圆环阵列, OAM, 模间干扰, 远场增益

Abstract: Generating vortex electromagnetic waves carrying OAM (orbital angular momentum) dual-mode multiplexing based on a uniform circular array is studied. Firstly, it theoretically discusses that a uniform circular array can generate OAM vortex electromagnetic waves,three uniform arrays of different structures, excitation settings of array elements and calculation of transmission gain are proposed. Secondly, the influence of the generated OAM dual-mode multiplexed vortex electromagnetic wave on the far-field gain in the main axis direction is discussed from the angles of the array elements in the array, the radius of the array, and the arrangement of the array elements. Finally, the degree of inter-mode interference in OAM dual-mode multiplexing is studied from the arrangement of array elements. The simulation results show that the greater the number of array elements in the circular array,the greater the far-field gain on the main axis; the difference radius in the circular array has a less influence on the far-field gain on the main axis; compared with the single arrangement, the vortex wave generated by the uniform circular array combined by two different arrangement modes has larger far-field gain on the main axis and less inter-mode interference.

Key words: uniform circular array, OAM, inter-mode interference, far-field gain

中图分类号:

TN912

曹乐搬, 周斌, 卜智勇, 兰云. 轨道角动量双模复用的远场增益及隔离度[J]. 中国科学院大学学报, 2021, 38(1): 137-144.

CAO Leban, ZHOU Bin, BU Zhiyong, LAN Yun. Far-field gain and isolation of orbital angular momentum dual mode multiplexing[J]. Journal of University of Chinese Academy of Sciences, 2021, 38(1): 137-144.

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轨道角动量双模复用的远场增益及隔离度

Far-field gain and isolation of orbital angular momentum dual mode multiplexing

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