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预警雷达

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预警雷达 (英語：Early-warning radar) 是一种用于远距发现空中目标或水上目标的雷达系统，它能使得防空系统或反舰系统及早作出反应，它和指引火炮导弹的火控雷达是现在最常见的两种雷达类型。

历史

最早的预警雷达系统有英国的钱恩之家（英语：Chain Home），美国海军的CXAM雷达（英语：CXAM radar）和美国陆军的SCR-270（英语：SCR-270），德国的弗莱雅雷达（英语：Freya radar）. 它们的作用距离只有100-150英里。这是由于长波的电波传播（英语：Radio propagation）特性很差，而当时的短波处理技术不过关不能实用化短波雷达。

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预警雷达
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