针对空域角度的机载雷达发射波束方向图和波束扫描,研究了飞机的射频隐身技术。首先,在有无源探测系统先验 知识的情况下,根据方向图综合与波束形成的互易性,利用最小方差无失真响应波束形成技术在无源探测系统方向上形 成零点,辐射极低的能量;当没有无源探测系统先验知识时,通过副瓣电平控制方法降低雷达发射波束的副瓣,使得无源 探测系统截获到尽可能低的能量。然后,研究了机载雷达发射波束扫描捷变不确定性技术,提出了基于元胞自动机的发 射波束伪随机捷变方法。最后,仿真结果表明文中的方法和理论能有效提高飞机的射频隐身性能。

Aiming at the spatial domain'two aspects of the transmitting beam pattern and beam scanning, the RF stealth technology has been studied. At first, when there are some prior knowledge about the azimuth information of the passive detection system, on the basic of the reciprocity of the pattern synthesis, the beamforming the minimum variance distortionless response (MVDR) beamforming technology has been used, and zero points have been formed in the direction of the passive detection system so that extremely low energy have been radiated. Without any prior knowledge about the azimuth information of the passive detection system, these sidelobes level of the radar have been lowered through the control method of sidelobes level and the energy received by the passive detection system is as low as possible. Secondly, the agility uncertainty technology of the airborne radar beam scanning has been investigated. The emission beam pseudo-random hopping technology is proposed based on cellular automata (CA). Finally, simulation results show that the method and theory can effectively improve the performance of the aircraft RF stealth.

总装预研基金资助重点项目