2024-06-06
Broadband Generation Orbital Angular Momentum Beams Based on Uniform Phase Error Analysis of Uniform Circular Array
By
Progress In Electromagnetics Research Letters, Vol. 120, 53-58, 2024
Abstract
In this paper, we propose a method for generating broadband orbital angular momentum (OAM) beams, utilizing the two neighboring ports of the uniform circular array (UCA) excited with a phase difference of (2(π+δ)l)/N. This approach differs from current arrays used to generate an OAM beam with a phase difference of 2πl/N. We establish that the UCA can produce OAM beams covering 83% (7-17 GHz) of the bandwidth. The array antenna consists of three Vivaldi elements with a phase difference between adjacent ports, capable of generating OAM beams of mode 2 when being fed with equal amplitude and phase. In contrast to current OAM antenna arrays that require complex phase-shifting networks for feeding, our proposed antenna array offers simplicity in its feeding mechanism. Furthermore, the UCA-based Vivaldi antenna presents a novel approach for generating wideband OAM beams and holds significant potential for applications in broadband communication.
Citation
Na Li, Lingling Jiao, Guirong Feng, Ping Li, and Xiao-Wei Shi, "Broadband Generation Orbital Angular Momentum Beams Based on Uniform Phase Error Analysis of Uniform Circular Array," Progress In Electromagnetics Research Letters, Vol. 120, 53-58, 2024.
doi:10.2528/PIERL24041402
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