现代机载火控雷达需要对远距离或小目标进行探测和跟踪,对微弱信号的探测能力要求高,而灵敏度是衡量机载雷达探测微弱信号能力的一项重要指标,传统的内注入法测量雷达灵敏度已经不适合有源相控阵体制雷达。文中简单介绍了传统体制的机载火控雷达灵敏度测试方法,根据相控阵雷达的特点将外部辐射源测试法应用于相控阵雷达灵敏度测试,并针对其测试精度不满足要求的问题,提出了相对外部辐射源测量法,通过外置标准天线,提高了测试精度,使测试精度满足测试需求。

Modern airborne fire-control radar is applied to detect and track small target or long range target. It has a high requirement for the detection ability of weak and small signals. The sensitivity is an important specification for airborne radar which verifies the detection ability for small and weak signals. The traditional method of injection to test radar sensitivity is no longer suitable for active phased array radar. The traditional system test method is introduced simply in this paper for sensitivity of airborne fire control radar, according to the characteristics of phased array radar ,the external radiation source test method is applied to the sensitivity test of phased array radar, and aiming at the problem that the test precision does not meet the requirement, the relative external radiation source test method is proposed, the test precision is improved by external standard antenna, so that the test precision can meet the demand of measurement.

TN959