本文介绍了一种用级联定向耦合器扩展小功率标推的量程的方法。在处理功率传输系统中的失配问题时,应用了功率方程概念,使由于失配所引起的误差大大减小。应用该技术,在5cm频段波导系统内测量了标准喇叭天线的输入功率,估计总的不确定度约为±1.8％。 This article describes a method for scaling low-power push-scaling with cascaded directional couplers. In dealing with mismatch problems in power delivery systems, the concept of power equations has been applied to minimize errors due to mismatch. Using this technique, the input power of a standard horn antenna was measured in a 5 cm band waveguide system with an estimated total uncertainty of about ± 1.8%.