Ramesh R, Ebenezer D D
IEEE Trans Ultrason Ferroelectr Freq Control. 2008 Sep;55(9):2079-83. doi: 10.1109/TUFFC.899.
A method is presented to determine the equivalent circuits of broadband transducers with 2 resonances in the frequency band of interest. The circuit parameters are refined by least-squares fitting the measured electrical conductance data with this model. The method is illustrated by computing the conductance and susceptance of the equivalent circuits of 3 types of broadband transducers and comparing them with the measured values. The equivalent circuit of a transducer is necessary for designing filters that match the impedances of the transducer and the power amplifier that drives the transducer.
本文提出了一种确定在感兴趣频带内具有两个共振的宽带换能器等效电路的方法。通过使用该模型对测量的电导数据进行最小二乘拟合来优化电路参数。通过计算三种类型宽带换能器等效电路的电导和电纳，并将其与测量值进行比较来说明该方法。换能器的等效电路对于设计匹配换能器阻抗的滤波器以及驱动换能器的功率放大器是必要的。
