Broad-Band Multiple OAMs’ Generation With Eight-Arm Archimedean Spiral Antenna (ASA)

IEEE Access

Yang Yang¹  Yubin Gong¹  Kai Guo²  Zhongyi Guo²  Jinghua Sun³  Fei Shen³ 

[1] National Key Laboratory on Vacuum Electronics, University of Electronic Science and Technology of China (UESTC), Chengdu, China;School of Computer and Information, Hefei University of Technology, Hefei, China;School of Electrical Engineering and Intelligentization, Dongguan University of Technology, Dongguan, China;

关键词: Archimedean spiral antenna (ASA);    left-hand circularly polarized (LCP);    right-hand circularly polarized (RCP);    orbital angular momentum (OAM);    vortex wave;   

DOI  :  10.1109/ACCESS.2020.2980751

来源: DOAJ

【 摘 要 】

In this paper, an eight-arm Archimedean spiral antenna (ASA) is proposed to generate multiple orbital angular momentum (OAM) modes over a respectable frequency band (1.9-3GHz). Firstly, the principle of radiation by eight-arm ASA with right-hand spiral line is analyzed and simulated. It is demonstrated that the OAM modes and polarizations of the generated vortex waves are reconfigurable by changing the fed phases of the eight arms and controlling the radius of the antenna arm. Meanwhile, a prototype is fabricated and measured, in which experimental results agree well with simulation ones. At last, compared with other recently reported OAM-generating antennas, the proposed antenna with the smaller structure (Φ2.45λ₀, where λ₀ is the wavelength of the center frequency) can produce the higher gain (4.5-11.2dBi) vortex waves carrying multiple OAM modes (five modes) in the broad band of 1.9-3GHz.

【 授权许可】

Unknown