引言海盾系统为一个由雷达、计算机和导弹组成的舰载武器系统,它为美国海军提供一个保护伞。海盾武器系统的核心为计算机控制的S波段AN/SPY-1A相控阵雷达系统,它能同时在所有方向上“观测”。它能自动地探测、跟踪和截击大批飞机和导弹,并保持连续对空监视。 AN/SPY-1A雷达系统包括四个相控阵天线(提供半球复盖)、一部信号处理机、一部发射机、全套计算机以及一部接收机。雷达接收机不仅提供相控阵天线和信号处理机之间的接口设备,而且在处理来自复杂目标环境的雷达回波工作中起重要作用。 Introduction The Aegis system is a shipborne weapon system of radar, computers and missiles that provide an umbrella for the U.S. Navy. At the heart of Sea Shield’s weapon system is a computer-controlled S-band AN / SPY-1A phased array radar system that “observes” in all directions simultaneously. It can automatically detect, track and intercept a large number of aircraft and missiles, and maintain continuous air surveillance. The AN / SPY-1A radar system includes four phased array antennas (with hemispherical coverage), a signal processor, a transmitter, a complete computer and a receiver. Radar receivers not only provide interfacing devices between phased-array antennas and signal processors, but also play an important role in handling radar echoes from complex target environments.