和差比幅测向技术的仿真与实验分析

Simulation and Experimental Analysis of Sum-and-Difference Amplitude DF Technology

和差比幅测向法是雷达测向中最常用的测向方法。基于和差比幅无线电测向原理,设计用于通信信号和雷达信号的无线电测向系统。该系统的亮点在于可用于背负式测向,且结构简单,重量轻。利用功分器设计和差馈电网络,实现和、差信号的输出,由转台和转台控制器组成的伺服系统,以频谱仪代替接收机,设计出一套小型化的和差比幅测向系统,并在350 MHz、800 MHz和1 000 MHz三个频点进行实际测试,并最终在PC端给出相应的测试结果。

Sum-and-difference amplitude direction finding method is the most commonly-used method for radar direction finding. Based on the principle of sum-and-difference amplitude of radio direction finding, the radio direction finding system for communication and radar signals is designed. The bright spot of this system is that it can be, for its simple structure and light weight, used for back-bearing direction finding. The power divider is used to design the sum-and-difference feed network, so as to realize the output of sum or difference signal. The servo system is composed of a turntable and a turntable controller, and with spectrum analyzer instead of receiver, a miniaturized sum-and-difference-amplitude radio direction finding system is designed. The actual test is carried out at 350 MHz, 800 MHz, and 1000 MHz, and finally the corresponding test results are acquired at the PC terminal.