频选雷达罩电性能的基本问题及解决方法

频率选择表面(FSS)雷达罩技术是新一代战机实现隐身的重要途径。基于目前国内外FSS研究和实践的结果,从FSS的基本要素出发,对FSS雷达罩电性能设计涉及的谐振频率、带宽、栅瓣等基本问题进行了分析、研究、梳理和归结,针对雷达罩入射角和入射波极化变化的情况,对FSS如何增加频带宽度、实现谐振频率与带宽的稳定性、避免栅瓣对RCS的影响等提出了应对办法,指出FSS单元选择、设计小尺寸单元并将它们紧凑排列以及正确地进行介质加载是获取优良电性能的关键。

Elementary Problems and Solutions for Electrical Performance Design of FSS Radome

Frequency selection surface（FSS） radome is an important approach to realize the stealth requirement of the new generation aircraft. Based on the domestic and oversea results of research on FSS, the detailed analysis, research, classification and summary are made for the resonant frequency, band width, and grating lobe problems related to the electrical performance design of FSS radome. Aiming at the incident angle change and the polarization change of the radome, the techniques to increase the band width, improve the stability of the resonant frequency and the band width, as well as avoid the influences of the grating lobes on the RCS are proposed. As a result of the study, the paper further points out that the selection of FSS cell, the design of small size FSS cells, the compact arrangement of these small cells, and the correct medium loading are the keys to obtain perfect electrical performance.