本文从广义电报方程出发,推导出了波导等效特性阻抗新公式。由这一新的特性阻抗,可以较为准确地把计算出非均匀波导的反射系数与电压驻波比。与谢昆诺夫在1944年提出的波导特性阻抗相比,由新的特性阻抗计算出的电压驻波比更接近于实测值。 Based on the generalized telegraph equation, this paper deduces a new formula of waveguide equivalent characteristic impedance. From this new characteristic impedance, the reflection coefficient and VSWR of the inhomogeneous waveguide can be calculated more accurately. Compared with the waveguide characteristic impedance proposed by Sheikhinov in 1944, the voltage standing wave ratio calculated by the new characteristic impedance is closer to the measured value.