摘要
电扫描多波束恒差比幅测向体制在现代雷达截获接收机中有着广泛应用。他是由微波开关依次快速接通各个天线,通过比较相邻天线接收通道上信号幅度的大小来实现测向的。文章首先以任两个相邻天线和全向参考天线接收及信号处理过程,详细推导了电扫描恒差比幅测向方程。然后以该方程为基础,根据该方程中各个观测量相互独立的特点,方位测量误差的均方根值可由测向方程的全微分求得,并将其作为电扫描恒差比幅测向的精度,由该精度公式可以看出,电扫描恒差比幅测向有很高的精度,并且在不同的角度上,其精度保持稳定。
The system of Electronic Scan Multi- beam Constant Difference Amplitude Comparison （ESCDAC）direction measurement is widely applied in modern radar interception receivers, microwave switches fleetly switch on antennas one by one. The direction measurement is realized by comparing the signal amplitude of two borders upon antenna receiver channels. Firstly ,based on the inception and procession of two borders upon antenna receiver channels and full -direction reference antenna. The equation of ESCDAC is presented. Secondly, Based on this equation and the independent characteristic of observation valves, the ESR of the azimuth measurement error is presented by full - difference of the measurement equation which acts as the precision of ESCDAC. From this precision formula,the precision of ESCDAC is high and steady in different angles.
出处
《现代电子技术》
2005年第17期3-4,8,共3页
Modern Electronics Technique
关键词
雷达截获系统
恒差比幅测向
精度分析
天线
radar interception system
constant difference amplitude comparison direction measurement
precision analysis
antenna
