织物基柔性频率选择表面材料的研究进展

Research progress of fabric-based flexible frequency

介绍了织物基柔性频率选择表面(FSS织物)的应用基础及其在天线、频率选择通信窗和吸波材料等方面的应用。阐述了FSS织物的3种成形方法,包括直接在织物上形成周期性导电图案、先形成周期性导电图案再与织物复合、导电层先与织物复合再形成周期性图案。其中,直接在织物上形成周期性导电图案是主流方法。3种方法形成的金属层FSS图案都存在金属与织物拉伸伸长不匹配的问题,容易造成金属FSS图案的断裂失效,开发具有高弹性的导电纱线是解决这一问题的有效途径。按频响特性FSS织物分为贴片型、孔径型和吸波辅助型3类。FSS织物正在由传统的单频带单层结构向多层级联、多频带、极化和角度不敏感、动态可调吸波结构发展。

The application basis of fabric-based flexible frequency selective surface(FSS fabric)and its application in antenna,frequency selective communication window and wave absorbing material were introduced.Three kinds of FSS fabric forming methods were described,including directly forming periodic conductive patterns on fabric,forming periodic conductive patterns prior to compositing with fabric and forming periodic patterns subsequent to compositing conductive layer with fabric.Among them,directly forming periodic conductive patterns on fabrics is a mainstream method.The metal layer FSS patterns formed by the three methods all have the problem of mismatching the tensile elongation of the metal and the fabric,which can easily lead to fracture and failure of the metal FSS pattern.An effective way to solve this problem is to develop conductive yarns with high elasticity.According to the frequency response characteristics,FSS fabrics are divided into three types:patch type,aperture type and wave absorbing auxiliary type.FSS fabric is developing from a traditional single-frequency band single-layer structure to a multilayer cascade,multi-frequency band and polarized structure with angle insensitivity and dynamically adjustable wave absorbing function.