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一、前言频率压缩接收机(FCR)是一种快速扫描接收机.常用来检测较宽射频带宽中的所有信号.并按频率进行分选.该接收机的基本单元示于图1。接收机技术的关键部件是在混频器的输出端的色散延迟线滤波器,该色散(?)波器理想情况下具有一线性的延迟一频率特性.最终的系统具有的特性是,接收机输入端上频率恒定的 RF 脉冲,被转换成在色散滤波器的输入端的具有频率线性变化即线性“调频”的脉冲.信号脉冲的全部频率分量通过色散
I. INTRODUCTION The Frequency Compression Receiver (FCR) is a fast-scan receiver that is commonly used to detect all signals in a wide radio frequency bandwidth and sort them by frequency. The basic unit of this receiver is shown in Figure 1. A key component of receiver technology is the dispersive delay line filter at the output of the mixer, which has, ideally, a linear delay-frequency characteristic. The resulting system has the characteristic that the receiver input The constant-frequency RF pulse at the end is converted into a pulse having a linearly frequency-modulated, linear “frequency modulation” at the input to the dispersion filter.The entire frequency component of the signal pulse is amplified by dispersion