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讨论雷达导引头初始截获和下视能力等设计问题.着重讨论导引头在泄漏和杂波下的性能.导引头在照射器强泄漏下的工作性能由“泄漏下能见度”指标确定,它与接收机动态范围、照射信号中的相位噪声和本振相位噪声边带、截获器的性能有关.“杂波下能见度”指标用于评价导弹在杂波背景中的工作质量,它与照射功率、照射天线及导引头天线方向图、导弹多普勒分辨单元等因素有关.具有下视跟踪性能的导引头还必须具备识别主瓣杂波,防止锁定主瓣杂波,并在飞行中段调整弹道、使目标谱线避开主瓣杂波的功能.
The design problems of initial seeker and down-looking radar seeker are discussed, and the performance of seeker under leakage and clutter is emphatically discussed.The working performance of seeker under the strong leakage of illuminator is determined by the index of “Visibility Under Leakage” It is related to the dynamic range of the receiver, the phase noise in the illumination signal, and the LO noise sideband and the performance of the interceptor.The “visibility under clutter” indicator is used to evaluate the quality of the missile’s work in a clutter background, Power, radiation antenna and seeker antenna pattern, the missile Doppler resolution unit, etc. Seeker with tracking performance must also have to identify the mainlobe clutter, to prevent the main lobe clutter, and in the flight Trajectory adjustment in the middle, so that the target line to avoid the main lobe clutter function.