第21卷第8期 2013年8月
文章编号1004-924X(2013)08-1949-08
光学精密工程
Optics and Precision Engineering
Vol.21No.8
Aug.2013
具有低空气隙敏感度的雪花单元频率选择表面
王岩松*，高劲松，陈新，赵晶丽
（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，吉林长春130033)
摘要：针对在工程研制阶段隐身雷达氧与频率选择表面(FSS)间的空气引起的隐身雷达罩传输性能劣化间题，设计了一种具有低空气欧敏感度的新型雪花环状单元频率选择表面以降低空气原的影响。采用模式匹配法进行了FSS理论仿真。为了进行对比分析，针对假定技术指标分别给出新型单元FSS和Y环单元FSS的最优化设计结构，采用光刻工艺制备出等效FSS平板样件，在微波暗室中采用自由空间法测试其传输性能以验证设计。仿真和测试结果一致表明：新型雪花单元FSS在很大的空气隙内（190~6500um）均满足技术指标，优于Y环FSS的最大空气除范圈（320~ 1900μm）。最后，简要分析了雪花单元FSS设计的优点。分析结果显示，新型雪花单元FSS在满足隐身雷达罩常规技术指标的前提下，具有较低的空气隙敏感度，可在工程试验阶段用于FSS的研制。
关键
词：频率选择表面(FSS)；隐身雷达率；空气陈；雪花单元
中图分类号：TN957;TN713
文献标识码：A
doi;10.3788/OPE.20132108.1949
Snowloopelementfrequencyselectivesurfacewith
low sensitivity to airgaps
WANGYan-song',GAO Jin-song,CHENXin,ZHAOJing-li
(KeyLaboratoryofOpticalSystemAduancedManufacturingTechnology,
Changchun Instituteof Optics,FineMechanics
andPhysics，ChineseAcademyofSciences，Changchun130033，China)
Correspondingauthor,E-mail：wangyansong99@163.com
Abstract: As the transmission properties of Frequency Selective Surfaces(FSS) will get worse because of the air gaps between FSS and original radome in the experimental stages, a novel snow loop element FSS was designed to reduce the effect of air gaps, The theoretical simulation was performed by using the mode matching method. For contrast, the best FSS structure designs of the novel snow loop ele-ment and Y loop element for the assumed qualification were chosen out respectively. The equivalent FSS sample plates were fabricated by using photolithographiy, and the transmission properties were tested in a microwave dark room to check the simulation results. Both the calculating and the testing results show that the novel element FSS meets the transmission request in a quite wide air gap range(190-6 500 μm), which is much better than the best Y loop design(320—1 900 μm). Advantages of
收稿日期：2013-03-09；修订日期：2013-05-15.
基金项目：中科院长春光学精密机械与物理研究所第三期创新工程资助项目（No.093Y32J090）