Anti-Matching Layer Structure for Ultrasound Suppression and Transducer Enhancement

Traditional ultrasound transducer design emphasizes efficient acoustic wave transmission using optimized matching layers. However, for certain applications, suppressing wave transmission is equally important and remains under explored. This study introduces a double anti-matching layer structure to reduce acoustic energy transfer. A one-dimensional transmission model is established to analyze transmission efficiency and classify four distinct suppression modes based on material properties and layer thickness. The suppression performance is confirmed through experiments. The double anti-matching layer structure achieves significantly stronger suppression compared to traditional structure. When integrated into an array transducer, the approach can improve sensitivity while preserving usable bandwidth. Furthermore, we apply the double anti-matching layer structure in the design of an array ultrasound transducer and compare its performance with that of traditional transducers, presenting the anti-matching structure as a novel approach to ultrasound transducer design.