一、前言采用两个混合 T 形电路的矩形波导阻抗电桥可用来测量插入损耗,该阻抗电桥是基于比较法原理工作的。最近在测量中发现存在一项系统误差,使对具有高反射的微波元件测得的插入损耗偏离其实际值。本文给出了 I. INTRODUCTION A rectangular waveguide impedance bridge with two hybrid T-circuits can be used to measure insertion loss, which is based on the principle of comparative law. Recently a systematic error was found in the measurements deviating the insertion loss measured for a microwave element with a high reflection from its actual value. This article is given