A Broadband Multi-Helix Conformal Sparse Array Design Method

The whole boat/UUV conformal sonar can make full use of the surface space of the installation platform to increase the effective aperture of the array, improve the long-range detection capability of the sonar, and there are no problems such as low operating frequency and limited use conditions of the towed line array. It is the future The development direction of submarine/UUV sonar, but there are many problems such as large-scale array elements and difficulties in realizing data transmission and power supply functions when laying a large-scale acoustic array on the surface of submarine/UUV. In this paper, aiming at the problem of realizing the surface conformal sonar of the whole boat/UUV, a wide-band multi-helix conformal sparse array method is proposed. The element spacing and the number of array elements, through simulation analysis, the number of array elements is 1/10 of the number of close-packed conformal array elements, and has lower side lobes at broadband operating frequencies, which can meet the needs of underwater acoustic detection and reconnaissance, communication, target recognition and other multi-functional requirements.