天线波束对飞机射频隐身性能的影响分析

Influence of Antenna Beam on Radiofrequency Stealth

射频隐身是新一代军用飞机必须具备的重要能力。从隐身飞机的实际使用环境出发,针对以往只考虑个体对抗特性,采用Schleher截获因子评价飞机射频隐身性能的不足,提出了基于整体对抗特性,采用联合截获概率评估射频隐身性能的新方法,为射频隐身研究提供了新思路。通过对隐身飞机的射频使用环境建模,计算了天线波束的空、地覆盖区大小,结合联合截获概率的定义和计算方法,仿真了不同情况下天线波束宽度对联合截获概率的影响。根据仿真结果,分析了天线波束对飞机射频隐身性能的影响,其结论可为隐身飞机天线设计时的折中考虑提供基础和参考依据。

Radiofrequency （RF） stealth is an important property of new generation military aircraft. By analyzing actual application environment of stealth aircraft, the drawbacks of using the Schleher inter- cept factor to evaluate RF stealth performance is discussed. A new method of of joint intercept probability to evaluate RF stealth performance is proposed. By practical circumstance modeling, the overlay area is calculated. With the definition of the joint intercept probability, the influence of the antenna beamwidth on the joint intercept probability i simulated. Result shows that the conclusions can be used as reference for designing stealth aircraft antenna and it is of considerable value to airplane RF stealth design.