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针对新一代军用飞机对射频隐身能力的迫切需求,研究了电波频率对射频隐身性能的影响。首先基于截获距离给出了隐身效率的定义。然后综合考虑自由空间衰减、大气吸收衰减和降雨衰减的影响,对截获距离与电波频率之间的关系进行了分析。最后仿真了10～40GHz之间,不同工作距离和天气环境下,频率改变对射频隐身性能的影响。结果表明,频率选择对射频隐身性能具有很大影响,在10～40GHz内通过频率改变能够提高约10%的隐身效率,同时工作距离和天气条件对隐身性能也会产生一定的影响。
In view of the urgent need of new-generation military aircraft for stealth radio capability, the influence of radio frequency on the performance of radio frequency stealth has been studied. Firstly, the definition of stealth efficiency is given based on the interception distance. Then, considering the influence of free space attenuation, atmospheric absorption attenuation and rainfall attenuation, the relationship between interception distance and radio frequency is analyzed. Finally, the simulation of the 10-40GHz, different working distance and weather conditions, the frequency of changes on the stealth RF performance. The results show that the frequency selection has a great influence on the stealth performance of the radio frequency, and the stealth efficiency of about 10% can be improved by changing the frequency within 10-40GHz. The working distance and the weather conditions also have an impact on the stealth performance.