【作者】 朱舜辉； 王建； 杨雪松；

【Author】 ZHU Shunhui;WANG Jian;YANG Xuesong;School of Physical Electronics, University of Electronic and Science Technology of China;

【机构】 电子科技大学物理电子学院；

【摘要】 本文采用材料分布法和水平集法相结合的混合拓扑优化算法,设计具有高隔离度、低交叉极化的双极化微带天线。算法基于梯度优化方法,收敛速度快,并同时具备材料分布法拓扑优化能力强、水平集法优化边界平滑的优点。采用该算法同时优化天线的阻抗匹配、端口隔离和交叉极化等多个目标。将天线设置为对称结构,使优化变量数减少为原来的一半。对优化得到的天线进行了仿真,在其中心频率5.8 GHz时,S11为-20.8 d B,S21低于-26.5 d B,天线的交叉极化比大于30 d B,天线最大增益约为7 d Bi。更多还原

【Abstract】 A hybrid topology optimization algorithm combining material distribution method and level set method is used to design a dual-polarized microstrip antenna with high isolation and low cross polarization. The algorithm is based on the gradient optimization method, which converges quickly. It also combines the advantages of high topology optimization ability of material distribution method and smoothing optimization structure boundary of level set method. The algorithm is used to optimize the impedance matching, port-to-port isolation and cross polarization of the antenna. By setting a symmetrical structure, the number of optimization variables is reduced by half. The optimized antenna is simulated. At the center frequency of5.8 GHz, S11 is-20.8 d B, and S21 is lower than-26.5 d B. The cross-polarization ratio is greater than 30 d B, and the maximum gain is about 7 d Bi.更多还原