RADIATION-PATTERN OF A FOCUSED TRANSDUCER - A NUMERICALLY CONVERGENT SOLUTION
RADIATION-PATTERN OF A FOCUSED TRANSDUCER - A NUMERICALLY CONVERGENT SOLUTION
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DOI：
10.1121/1.407329
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发表时间：
1993-11-01
影响因子：
2.4
通讯作者：
PARKER, KJ
中科院分区：
文献类型：
--
作者：
CHEN, XC;SCHWARZ, KQ;PARKER, KJ
重新检查聚焦换能器的辐射图案。辐射场分为照明区和阴影区。给出了用贝塞尔函数求和法求解压力分布的数值收敛解。这种解决方案是计算上更有利的比以前的结果，其中一个双重或单一的积分在复杂的平面上是必需的。低频离轴位置的压力振幅与早期报告略有不同。这种差异可能对反向散射系数确定具有重要意义，其中散射体被假定存在于时间门控体积上。作为一种极限情况，得到了一个平板散热器的解决方案。
The radiation pattern of a focused transducer is reexamined. The radiation field is divided into an illuminated zone and a shadow zone. A numerically convergent solution of the pressure distribution in terms summations of Bessel functions is provided. This solution is computationally more advantageous than earlier results where a double or single integral in the complex plane is required. The pressure amplitude differs from earlier reports slightly for off-axis locations at low frequency. This difference may have significance for backscatter coefficient determination where scatterers are assumed present over a time-gated volume. The solution for a flat disk radiator is obtained as a limiting case.