Design and analysis of a low-sidelobe underwater acoustic transducer

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Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (1) : 298-304.

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Design and analysis of a low-sidelobe underwater acoustic transducer

ZHANG Bin1, TONG Hui*1,2, ZHOU Bowen1, YANG Daojun1, HUANG Fan1

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Abstract

Low-sidelobe broadband transducers can improve the detection accuracy and anti-jamming ability of sonar system. A low-sidelobe broadband and high frequency underwater acoustic transducer is designed，which incorporates 1-3 piezoelectric composite with non-uniform distribution piezoelectric phases technology and matched layer multimode coupling technology. Theoretical calculation model and simulation model were established. The variation laws of frequency with piezoelectric phase volume percentage and sidelobe level with ring radius were analyzed by numerical calculation and finite element simulation. According to the optimized design parameters, the transducer was fabricated and measured. The measured results are in good agreement with the simulation, providing experimental validation for the feasibility of achieving the low sidelobe broadband transducer. The measured sidelobe level is -23.9dB, exhibiting reduction 6.3dB compared to conventional piston array sidelobe level. The center frequency is 300kHz, while the transmission voltage response bandwidth (-3dB) spans across 150kHz.

Key words

low sidelobe / broadband / non-uniform distribution / 1-3 piezoelectric composite / transducer

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ZHANG Bin1, TONG Hui1, 2, ZHOU Bowen1, YANG Daojun1, HUANG Fan1. Design and analysis of a low-sidelobe underwater acoustic transducer[J]. Journal of Vibration and Shock, 2025, 44(1): 298-304

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