【作者】 王建； 杨雪松； 王秉中；

【Author】 WANG Jian;YANG Xue-Song;WANG Bing-Zhong;School of Physical Electronics, University of Electronic and Science Technology of China;

【机构】 电子科技大学；

【摘要】 本文将材料分布法和水平集法两种拓扑优化方法相结合,基于有限元仿真算法和天线目标函数的敏感度分析,进行了圆极化锥形波束天线的优化。将待优化天线的初始结构设为N等分旋转对称结构,并利用结构对称性将仿真模型和优化变量减少为原来的1/N。利用混合拓扑优化算法,通过230次迭代达到预期目标。对天线进行了加工和测试,在优化频率5.8 GHz,测试的S₁₁为-20 d B,增益为7.8 d Bi,最大波束指向俯仰角30o方向,且在俯仰角10o-50o范围内轴比低于3 d B,仿真和测试数据吻合良好。更多还原

【Abstract】 Two topology optimization methods, namely the material distribution and the level set methods, are used together to optimize a conical-beam antenna by applying finite element method and sensitivity analysis. The antenna is designed to have a rotationally symmetric structure. By applying this symmetry feature, the simulation model and the optimization variables can be reduced considerably. By using the above method, optimization objective is achieved after 230 iterations. The measured data show that the antenna has a beam-pointing angle of 30°, gain 7.8 d Bi, S₁₁-20 d B, 3-d B axial ratio beamwidth is 10°-50°in the elevation plane at prescribed frequency 5.8GHz. The measurement and simulation data match well.更多还原