Acoustic Vortex Field Generated by Phased Modulated Concentric ring Array

Vortex field can be generated by the phase modulated circular transducer array. However, the side lobe of the beam may interfere the transmission and reception of the signals. In order to reduce the influence of side lobe, a phased modulated concentric ring array is proposed in this paper to produce the vortex field with low side lobe. By exploring the far-field radiation patterns of the concentric ring array with different inner circle radius, the number of array elements and the initial phase, we obtain the suitable array arrangement with better radiation pattern. This paper should be of positive significance to the development of underwater sound field detection and identification technology.