Optimized Backing Layers Design for High Frequency Broad Bandwidth Ultrasonic Transducer. - Chenxue Hou; Chunlong Fei; Zhaoxi Li; Shuxiao Zhang; Jiujing Man; Dongdong Chen 010; Runcong Wu; Di Li 003; Yintang Yang; Wei Feng 009 (IEEE Trans. Biomed. Eng., 2022)