衰减器和移相器是分别用来改变传输系统中电磁波场强的振幅和相位的元件。衰减器和移相器联合使用,可以调节传输线中电磁波的传播常数,因此它们是最基本的微波元件。衰减器和移相器的结构都有固定式和可调式两种,它们都是接入微波传输系统中的双口元件。一、衰减器为了固定传输 Attenuators and phase shifters are used to change the transmission system, the electromagnetic field strength of the amplitude and phase components. Attenuators and phase shifters work together to adjust the propagation constant of electromagnetic waves in the transmission line, so they are the most basic microwave components. Attenuator and phase shifter structure has a fixed and adjustable two, they are access to microwave transmission system dual-port components. First, the attenuator for a fixed transmission