飞机射频隐身表征参量及其影响因素分析

 随着军事装备的不断发展,无源探测器（电子支援系统、雷达告警接收机和电子情报接收机）对飞机的探测能力大大提高。为了避免机载雷达设备辐射的射频(RF)信号被截获,要求飞机具有良好的射频隐身性能。综合考虑机载雷达探测距离和无源截获接收机截获距离之间的关系以及天线空域扫描方式发生捷变对飞机射频隐身性能的影响,指出了用施里海尔(Schleher)截获因子评价飞机射频隐身性能的不足,并提出用信号截获率来表征飞机射频隐身特性的方法。最后,对影响信号截获率的因素进行分析与计算,在此基础上给出飞机实现射频隐身的途径与方法。该评价方法综合了飞机在时域、频域和空域上的射频隐身特性,对飞机的射频隐身设计具有参考价值。

Characterization Parameters of Warplane RF Stealth and Analysis of Its Affecting Factors

With the continuous development of military equipment, passive detectors such as electronic support measures, radar warning receivers and electronic intelligence receivers now possess very powerful detecting capability to locate a warplane or battleplane and so its airborne radar facilities must have good radio frequency (RF) stealth property to avoid the radio frequency signals being intercepted. The relationship between the detecting range of an airbone radar and the intercepting range of passive intercepting receivers is analyzed and the influence of the agile space scanning mode of antenna on a warplane RF stealth performance is considered. The drawbacks of using the Schleher intercept factor to evaluate the RF stealth of a warplane is discussed and a new method of utilizing the signal intercept probability to appraise RF stealth is proposed. Finally, the factors affecting the signal intercept probability is computed and analyzed and the designing strategy and technical approach of battleplane RF stealth is put forth. The signal intercept probability synthesizes the RF stealth characteristics of an aircraft in the three domains of time, frequency and space. It is therefore of considerable value to airplane RF stealth design.