引言为了设计低损耗,宽带超声换能器,我们在本文中讨论各种不同的参量。首先,为把由高声阻抗的振荡晶体发出的压力波传递到水中,我们使用了一个或二个1/4波长的匹配部分。通过我们预先编写入计算机的程序,就可检验此种结构的换能器的带宽和损耗。在匹配层的设计上,我们考虑到压电元件的厚度是有限度的,因此,为了获得高阻抗的匹配层,我们研究了许多材料,其特性可参阅本文附录(见原文)。 Introduction In order to design low-loss, broadband ultrasound transducers, we discuss various parameters in this article. First, to pass a pressure wave from a high-impedance oscillating crystal into the water, we use one or two 1/4 wavelength matching parts. Through our pre-programmed into the computer, you can test the structure of the transducer bandwidth and loss. In designing the matching layer, we consider that there is a limit to the thickness of the piezoelectric element. Therefore, many materials have been studied to obtain high-impedance matching layers. Their properties can be found in the appendix (see original text).