本文讨论一种自相关型宽频带的鉴频器,它实际上是一种微波干涉仪型鉴频器。理论上它可以做到宽频带,实际上已做到1～18GH_2的频带[2]。因此应用这种鉴频器作为测量CW雷达设备零值中的频率解调器是非常合适的。文章从这种鉴频器的基本原理出发,分析了其鉴频的特性和迟延,分析了作为零值测量设备时的一些误差因素,以实例叙述了这种鉴频器的设计,最后介绍了应用于零值测量中的实验结果。 This article discusses a self-correlation wideband frequency discriminator, which is actually a microwave interferometer type frequency discriminator. In theory, it can do a wide band, in fact, has done 1 ~ 18GH_2 band [2]. Therefore, it is very suitable to use this frequency discriminator as a frequency demodulator for measuring the zero value of a CW radar device. Based on the basic principle of this frequency discriminator, the article analyzes the characteristics and the delay of its frequency discrimination, analyzes some error factors when used as a zero value measuring device, and describes the design of this frequency discriminator by an example. Finally, Applied to zero-value measurements in the experimental results.