具有陡降特性的新型混合单元频率选择表面

发布时间：2019-06-02 06:36

【摘要】：频率选择雷达罩是频率选择表面(FSS)的重要应用之一,为了获得频率选择雷达罩更好的隐身性能,设计了一种基于开孔单元FSS新型单元FSS.这种新型单元是在原有开孔单元周期边界处增加条形孔构成,其传输性能兼具开孔型和贴片型FSS的特征,因此称作混合单元频率选择表面.以FSS在某导弹雷达罩上的应用为背景,采用周期矩量法及离散粒子群算法进行设计优化.仿真结果表明,新型混合单元FSS与对应的开孔型FSS相比具有更陡峭的过渡带和更低的阻带透过率;与双屏FSS相比具有更低的通带插入损耗和更薄的厚度,且结构和制作工艺相对简单.采用自由空间法对等效平板样件进行传输性能测试,测试和仿真曲线符合较好,验证了设计的准确性和可行性.新型混合单元FSS特别适用于敌我双方工作频段接近的情形,它的提出为FSS隐身雷达罩研制提供了一条可行性较高的新途径.
[Abstract]:Frequency selection radar cover is one of the important applications of frequency selection surface (FSS). In order to obtain better stealth performance of frequency selection radar cover, a new unit FSS. based on open hole unit FSS is designed. This new type of element is composed of strip holes at the periodic boundary of the original opening element. Its transmission performance has the characteristics of both open and patch FSS, so it is called frequency selection surface of hybrid unit. Based on the application of FSS in a missile radome, the periodic moment method and discrete particle swarm optimization algorithm are used to optimize the design. The simulation results show that the new hybrid unit FSS has steeper transition zone and lower stopband transmittance than the corresponding open FSS. Compared with double screen FSS, it has lower passband insertion loss and thinner thickness, and the structure and fabrication process are relatively simple. The free space method is used to test the transmission performance of the equivalent plate sample, and the test and simulation curves are in good agreement with each other, which verifies the accuracy and feasibility of the design. The new hybrid unit FSS is especially suitable for the situation where the working frequency band of the enemy and us is close to each other. Its proposal provides a new feasible way for the development of FSS stealth radar cover.
【作者单位】：中国科学院长春光学精密机械与物理研究所中国科学院光学系统先进制造技术重点实验室;
【基金】：长春光机所重点实验室基金(批准号:YZGX1SJ13A)资助的课题~~
【分类号】：TN957

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