文章摘要
Dandan Liu,Liangqi Gui,Ke Chen,Liang Lang,Zixiao Zhang,Han Chen,Lixing Liu,Tao Jiang.[J].重庆邮电大学新办英文刊,2021,7(1):16-28
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Theoretical analysis and comparison of OAM waves generated by three kinds of antenna array
Received: November 17, 2019  Revised: September 25, 2020
DOI:https://doi.org/10.1016/j.dcan.2020.09.009
中文关键词: 
英文关键词: Orbital angular momentum;Circularly polarized wave;Antenna array;Theoretical formula
基金项目:This study was supported by the National Natural Science Foundation of China (NSFC 61771213), Shanghai Aerospace Science and Technology Innovation Fund (SAST2017-113), the Fundamental Research Funds for the Central Universities (HUST2016JCTD203, 2018KFYYXJJ140).
AuthorInstitutionE-mail
Dandan Liu Wuhan National Laboratory for Optoelectronics, School of Electronic Information and Communications, Huazhong University of Science and Technology, Wuhan, 430074, China  
Liangqi Gui Wuhan National Laboratory for Optoelectronics, School of Electronic Information and Communications, Huazhong University of Science and Technology, Wuhan, 430074, China  
Ke Chen Wuhan National Laboratory for Optoelectronics, School of Electronic Information and Communications, Huazhong University of Science and Technology, Wuhan, 430074, China  
Liang Lang Wuhan National Laboratory for Optoelectronics, School of Electronic Information and Communications, Huazhong University of Science and Technology, Wuhan, 430074, China  
Zixiao Zhang Wuhan National Laboratory for Optoelectronics, School of Electronic Information and Communications, Huazhong University of Science and Technology, Wuhan, 430074, China  
Han Chen Wuhan National Laboratory for Optoelectronics, School of Electronic Information and Communications, Huazhong University of Science and Technology, Wuhan, 430074, China  
Lixing Liu Wuhan National Laboratory for Optoelectronics, School of Electronic Information and Communications, Huazhong University of Science and Technology, Wuhan, 430074, China  
Tao Jiang Wuhan National Laboratory for Optoelectronics, School of Electronic Information and Communications, Huazhong University of Science and Technology, Wuhan, 430074, China taojiang@hust.edu.cn 
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中文摘要:
      
英文摘要:
      Antenna array is one of the methods which can generate Orbital Angular Momentum (OAM) waves. However, OAM waves generated by different antenna arrays have different characteristics of Electric-field (E-field) components’ distribution and radiation patterns. In order to solve this problem, we derive E-field formulas of OAM waves generated by different kinds of dipole antenna array in this paper. The dipole antenna arrays are arranged by three methods: 1) antenna elements are in the same direction of y axis, 2) antenna elements are in the radial direction and 3) antenna elements are in the azimuthal direction. Results show that x components, y components and z components carry different OAM modes under the three conditions. Simulation results show that the same direction antenna array produces the best OAM waves because the y component is dominated by OAM mode l and RHCP/LHCP waves are negligible in energy, while the pure OAM waves carried by the z components generated by the other two antenna arrays have little energy. In addition, only the radiation pattern of l = 0 produced by the same direction antenna array does not have a null zone in the propagation direction. Radiation patterns of l = ±1 do not have null zones in the propagation direction generated by other two antenna arrays.