球面超声相控阵列及其相位与幅度调控精度  

Ultrasound Spherical Phased-Array and the Effect of Phased and Magnitude Precision

作　　者：李国伟[1] 熊斌[1] 陈亚珠[1] 

机构地区：[1]上海交通大学生物医学仪器研究所,上海200030

出　　处：《上海交通大学学报》2001年第9期1412-1414,共3页Journal of Shanghai Jiaotong University

摘　　要：研究了一种不等间距排列的球面相控阵列及其相位和幅度调控量化误差对声场的影响 .结果表明 ,不等间距排列大大降低了栅瓣 ,同时其相位与幅度调控精度不会改变焦点声场的主瓣和栅瓣的位置 ,但对主瓣幅值有明显的影响 .4位的调相和调幅精度可以较好地满足设计要求 .This paper provided a new spherical phased-array with unequal center-to-center space between arrays and researched the effect of phased and magnitude quantization errors on the field patterns. The sound field simulation results show that the unequal center-to-center space between arrays suppress the grating lakes dramatically; and the phased and magnitude errors give distinctive effects on the value of the main and grating lobes but not their positions. The 4-bit phased and magnitude precision can satisfy the design request well.

关 键 词：不等间距 球面相控阵列 量化误差 相位调控 幅度调控 超声治疗系统 

分 类 号：R454.3[医药卫生—治疗学]