一种改进的生物医用同轴探头的实验研究

Experimental Research of an Improved Coaxial Probefor Biomedical Application

在生物电磁学实验研究中,探头的结构对于生物组织介电特性信息的获取至关重要.作者比较了终端开口同轴探头和圆形微带贴片探头的结构,并在纯水和1%盐溶液中分别测量了以上两种探头的扫频特性和场透入深度,实验表明,圆形微带贴片探头灵敏度和场透入深度优于改进前的终端开口的同轴探头,并有效降低了测量中的反射系数.

Structure of probe plays an important role in measurement of dielectric properties of tissues. A circle patch probe is presented and investigated mainly using experimental method. The experimental results show that the circle patch probe is prior to open-ended coaxial line, both in sensitivity of reflection coefficient to the change of frequency and in radiation depth into tissues.