蜂窝结构等效电磁模型的仿真研究  

Simulation Study on Equivalent Electromagnetic Models of Honeycomb Structure

作　　者：赵雨辰[1] 万国宾[1] 

机构地区：[1]西北工业大学电子信息学院,西安710129

出　　处：《微波学报》2013年第1期38-41,45,共5页Journal of Microwaves

基　　金：航空科学基金(20101853019)

摘　　要：蜂窝结构是多功能吸波材料中广泛应用的结构,但与均匀平板相比,其几何结构复杂,分析设计较为困难。通过分析蜂窝结构的周期性并建立仿真模型,在雷达工作频段(2～18GHz)内,研究了蜂窝结构等效介电常数变化规律并对宽频带内Hashin-Shtrikman(HS)模型和强扰动理论(Strong Fluctuation Theory,SFT)模型的准确性进行了分析。结果表明:蜂窝结构的等效介电常数与入射波频率及其单元尺寸紧密相关,而等效模型并不能完全反映这种变化趋势;各组分材料的电磁参数也会在一定程度上影响等效电磁参数的色散特性和等效模型的准确性;蜂窝结构的横向等效介电常数并非是完全相等的,但两者差异较小;SFT模型则近似于HS下界模型。Honeycomb structure is widely used in the multi-function radar absorbing materials （ RAM）, but its high geometric complexity would bring troubles to the design of RAM. In this paper, the reflections of honeycomb structure and its equivalent electromagnetic models are compared by simulation method in principle radar frequency （2 - 18GHz） , and then, the accuracy of the Hashin-Shtrikman （HS） model and Strong Fluctuation Theory （SFT） model are discussed by extracting the equivalent permittivities. The conclusions are as follows ： firstly, the equivalent parameters are a function of the frequency of incident wave and the dimension of honeycomb structure, and the equivalent models can not reflect this property completely ; secondly, the electromagnetic parameters of components of honeycomb structure would affect the accuracy of the equivalent models; thirdly, the transverse equivalent parameters are not completely identical but have a smaller difference;lastly, the SFT model is similar to HS lower model.

关 键 词：蜂窝结构吸波材料 等效介电常数 HS模型 SFT模型 

分 类 号：TM25[一般工业技术—材料科学与工程]