驻波电桥可代替测量线或定向耦合器用来测量同轴元器件的电压驻波比。电桥的有效方向性D_e是一项最直接影响测量误差及标志驻波电桥性能的重要指标。本文着重简述测定电桥有效方向性D_e和电桥本身方向性D的几种方法,有助于研制电桥过程中有目的地改善电桥性能。 VSWR bridges can be used to measure the VSWR of coaxial components instead of measurement lines or directional couplers. The effective directivity of the bridge, D_e, is an important indicator that directly influences the measurement error and the performance of the standing bridge. This article focuses on several methods to determine the effective directionality of the bridge D_e and the directionality of the bridge D, which helps to improve the performance of the bridge purposefully during the development of the bridge.