表面纹理对反射面天线电性能的影响  

Effects of Surface Texture on Far Field Patterns of Reflector Antennas

作　　者：李鹏[1] 郑飞[1] 李娜[1] 

机构地区：[1]西安电子科技大学机电科技研究所,西安710071

出　　处：《电子与信息学报》2009年第9期2278-2282,共5页Journal of Electronics & Information Technology

基　　金：国家973计划项目;国家自然科学基金(50475171)资助课题

摘　　要：反射面天线面板的加工质量包括加工精度和表面质量,两者都会影响天线的电性能。论文针对研究较少的表面加工质量,利用分形函数建立表面纹理的数学模型,并通过相位差将微观表面纹理引入天线的远场方向图计算公式,利用三角形单元的Gauss积分公式数值求解。通过仿真,分析了不同的表面纹理幅度、密度和粗糙程度对天线远场方向图的影响。研究发现:表面纹理的幅度越大,对方向图的影响越大;密度越大、越粗糙,影响越小。而且,幅度的影响最大,密度其次,粗糙程度影响最小。仿真的结果与模型定性分析的结论符合。所提出的模型和方法为研究面板表面加工质量对反射面天线电性能的影响提供了新的思路,得出的结论也可供工程实践参考。The machining quality of reflector antenna panels includes machining accuracy and surface quality, both of them will effect electrical performance of the antenna. For the surface quality which is studied less, surface texture is modeled by fractal function. Microscopic surface texture is introduced in the formula of antenna＇s far field patterns by phase difference. Gaussian integral formula in triangular element is used in numerical solution of the formula. By simulation experiment, the effects of different amplitude, density and roughness of the antenna panels＇ surface texture on antenna＇s far field patterns is studied. Research shows that with the increase of amplitude, the far field pattern changes more; with the increase of density and roughness, the far field pattern change less. And the effect degree of amplitude is the first, the density is the second, the roughness is the least. A new way of studing the effects of surface texture on far field patterns of the reflector antenna is proposed, and the conclusion can be referenced in practice.

关 键 词：反射面天线 机电耦合 表面纹理 分形函数 远场方向图 

分 类 号：TN823[电子电信—信息与通信工程]