摘要
大量的研究结果已经表明:机载天线等传感器孔径的分布与形状特征,对飞机隐身效果具有举足轻重的影响,如果不能有效控制机载射频(RF)孔径系统的特征信号(包括雷达散射截面(RCS)和电磁辐射控制),则通过外形、结构和材料隐身而达到的整机高隐身水平就会受到破坏。迄今为止,天线散射特性的评估是尚未完全解决的问题,而减缩天线RCS的手段和方法也有待深入研究。总结了F/A-22和F-35等国外先进隐身战斗机机载射频孔径系统隐身设计特点,从飞机总体隐身方案设计角度提出了对机载射频孔径系统隐身的需求,并针对具体应用提出最小化天线孔径数量、减小天线孔径外形尺寸、减缩天线孔径特征信号、采用低截获概率(LPI)技术等概念性解决方案。
Research has proved that the distribution and shape characteristics of sensor apertures for an airborne antenna play a critical role in the low observable （LO） effect of a stealth airplane. The characteristic signals of an airborne radio frequency （RF） aperture system （including its radar cross section （RCS） and electromagnetic radiation） need to be effectively controlled in order to achieve a high level of stealth efficiency of the whole plane by means of optimizing its contour,structure,and materials. So far antenna dispersion characteristics have not been perfectly appraised,and an effort has to be made to search methods/measures for reducing antenna RCS. This article addresses comprehensively the LO design characteristics of the airborne RF aperture systems for F/A-22 and F-35 （and other advanced aircraft）,and puts forward the LO requirements for the airborne RF aperture system from the point of view of general LO configuration. A conceptual solution is proposed,in which the number of antenna apertures is minimized,both the dimensions and characteriatic signals of the apertures are reduced,and low probability of intercept （LPI） techniques are adopted,in accordance with specific application requirements.
出处
《航空学报》
EI
CAS
CSCD
北大核心
2008年第6期1472-1481,共10页
Acta Aeronautica et Astronautica Sinica
关键词
先进战斗机
隐身技术
天线
射频
孔径系统
雷达散射截面
低截获概率
低可探测性
advanced aircraft
stealth technology
antenna
radio frequency
aperture system
radar cross section
low probability of intercept
low observable
