一、引言在环形器的一端装上一变容管可构成一连续的调相器。从环形器第一端进入的功率被第二端的变容器反射,由第三端输出,此输出的相位和幅度取决于变容管的反射系数。当加到变容管上的反向电压改变时,其反射系数值仍然较高而相位发生变化。此调相器所需调制功率很小,并且对调 I. Introduction At one end of the circulator, a varactor can be used to form a continuous phase modulator. The power entering from the first end of the circulator is reflected by the varactor of the second end and is output from the third end. The phase and amplitude of this output depend on the reflection coefficient of the varactor. When the reverse voltage applied to the varactor changes, its reflection coefficient is still high and the phase changes. The modulation power required for this phase modulator is small, and the transfer