混杂薄膜天线层的双稳态复合材料层板力电性能

给出了既有双稳态特性又具有天线功能的多功能复合材料层板设计与分析方法。基于非线性层板理论和Rayleigh-Ritz法，建立了双稳态混杂层板构型预报理论模型，并通过有限元计算和实验进行了验证。研究了薄膜天线混杂非对称双稳态复合材料层板的临界载荷及电磁性能，分析了铺层方式对双稳态混杂层板稳定构型、临界载荷和电磁性能的影响。结果表明：双稳态混杂层板通过转变其稳定构型实现天线主辐射方向在俯仰面内偏转30°，实现方向图可重构，扩大天线波束的扫描范围。铺层方式对层板构型和反射系数影响较大，当天线辐射层铺设在层板表面且聚酰亚胺薄膜厚度大于0.2 mm时，其双稳态特性消失，没有出现分叉现象，且其中心频率会左移大约0.2 GHz。

Mechanical and electric performance of bistable composite laminates with membrane antenna

A design and analysis method of multifunctional composite laminates, merging bistable characteristics and antenna function was presented. Based on nonlinear laminated theory and Rayleigh-Ritz method, the stable geometrical configuration of the bistable hybrid laminate was predicted. The theoretical, finite element analysis and measured stable geometrical configurations agree well with each other. The critical loads and electromagnetic performance of the bistable hybrid laminate were investigated. The influences of lay-ups on the configurations, critical loads and electromagnetic performance of the bistable laminate were studied. The results indicate that the main direction of the antenna is reconfigured about 30° in the vertical plane which can expand the beam steering by changing the two stable state of the hybrid laminate. The lay-ups of the laminate has a great influence on the configurations and reflection coefficient of bistable laminate. When the polyimide film thickness is higher than 0.2 mm, the laminate with surface antenna radiation layer has no bistable characteristics and its center frequency will shift to left about 0.2 GHz.