1.航天特种材料及工艺技术研究所，北京 100074;2.北京航空航天大学，北京 100191
1.Research Institute of Aerospace special materials & Technology，Beijng 100074;2.Beihang University，Beijng 100191
为了研究工程中柔性FSS屏铺覆工艺对透波窗口通带插损的影响，设计并制备了几种不同工艺缺陷的平板，采用自由空间传输反射法研究了平板在不同入射角下的通带损耗。结果表明：拼接缝隙使通带损耗在0°和60°入射角下增加了0.3 dB；拼接褶皱使通带损耗在0°入射角下增加了0.77 dB，在60°入射角下增加了1.55 dB；多层间FSS错位使通带损耗在0°入射角下增加了0.3 dB，在60°下入射角增加了1.05 dB。拼接褶皱对周期结构破坏最大，因此使通带损耗增加更大，在大入射角下通带损耗增加更加明显，在铺覆工艺时应尽量避免破坏柔性FSS屏的完整性。
To study the influence of the placement process of the flexible FSS panels on the passband insertion loss of transmission window， several panels with different defects were designed and fabricated. The free-space transmission/reflection method was used to study the passband insertion loss of the panels at different incident angles. The results show the aperture makes the passband insertion loss increase by 0.3 dB， when incident angel is between 0° and 60°.The drape makes the passband insertion loss increase by 0.77 dB when incident angel is 0° and by 1.55 dB when incident angel is 60°； the dissymmetry make the passband insertion loss increase by 0.3 dB when incident angel is 0° and by 1.05 dB when incident angel is 60°. The drape has the greatest damage to the periodic structure， so it increases the passband insertion loss more significantly， and the passband insertion loss increases more obviously at large incident angle. The integrity of the flexible FSS panels should be avoided damage as far as possible in the placement process.