Ultrasound Non-uniform Linear Array Design for Sidelobe Reduction

Previous studies about micro non-uniform linear arrays show that the simple non-uniform element distribution has some potential in minimizing sidelobe and improving imaging quality. However, the numerical relationship between the specific element distribution and sidelobe has not been explored. So we propose a quantitative method as theoretical guidance for non-uniform linear array optimization. The sound field pattern comparison between uniform and nonuniform linear array is discussed. It indicates that the first sidelobe of the non-uniform linear array can be down about −15.44 dB from the main lobe, which is lower than the theoretical value of the uniform linear array (−13.5 dB).