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在许多控制系统中,要求迅速而准确地测量微波相位,然后把这个量转化为数字量输入计算机,经过运算处理去控制某一参数,从而实现对系统的自动控制。例如目标模拟系统、某些高速控制电路和自动化生产线等都要求快速测量以达到高数据率。过去采用的一般测相技术,例如比较法测相技术,由于测试调整时间长,数据率低,已不适合上述系统使用。将微波信号通过变频转化为中频信号的系统虽然可以完成快速相位测量,但是它要求采用两路接收机,同时还要采用锁相技术。这种方法有两个缺点:一是成本
In many control systems, the microwave phase measurement is required to be measured quickly and accurately, which is then converted to a digital input computer which is then manipulated to control a certain parameter to achieve automatic control of the system. For example, target simulation systems, some high-speed control circuits, and automated production lines all require rapid measurement to achieve high data rates. In the past, general phase measurement techniques, such as the comparative method of phase measurement, were not suitable for the above system due to long test adjustment time and low data rate. The system that converts a microwave signal to an IF signal by frequency conversion, although it can perform fast phase measurements, requires two receivers and uses phase-locked technology. This method has two shortcomings: First, the cost