| In this paper, the physical meaning of orbital angular momentum and its application in wireless communication are introduced. It is pointed out that there is a lack of rigorous theoretical derivation in the study of the angular momentum of the circular array antenna. Therefore, this paper derives the mathematical theory foundation of the vortex wave generated by phased array antenna. On the basis of mathematical derivation, the effects of wavelength / radius ratio and topological charge number on the vortex pattern and gain are studied by using MATLAB and CST software.In the process of simulation, it is observed that in the case of high order topology, the phase of the vortex wave will produce fuzzy phenomenon,and with the increase of the number of modes, the fuzzy area will become larger and larger. This phenomenon has not been discussed, and the phase ambiguity will reduce the practical application of the array antenna. This paper with the method of mathematical research, found on the impact of the error oscillation function of fuzzy phenomenon and the derivation process integral in high frequency, explains the vortex wave in high order topologies, blurring causes phase. |
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