大型平面阵列天线辐射方向图的小阵外推计算和综合方法  

Extrapolative Method in Pattern Calculation and Synthesis of Large Plane Arrays

作　　者：张帅[1] 龚书喜[1] 关莹[1] 龚琦[1] 

机构地区：[1]西安电子科技大学天线与微波技术重点实验室,陕西西安710071

出　　处：《计算物理》2011年第4期554-560,共7页Chinese Journal of Computational Physics

基　　金：中央高校基本科研业务费(JY10000902009);国家自然科学基金(60801042)资助项目

摘　　要：基于子阵思想,小型阵列的单元辐射场等效大型阵列中相似环境下单元的辐射场,利用叠加定理计算大型阵的总辐射场.基于此方法和平面阵的辐射机理,提出运用小型直线阵外推计算大型平面阵辐射场的方法.有效地减小了计算量.利用此方法结合遗传算法通过优化单元的馈电幅度,综合了10×10元低副瓣微带贴片平面阵列天线,结果与HFSS仿真结果吻合良好.An efficient method is shown for radiation pattern of large plane arrays.Active element patterns of a large plane array are constructed from those of a small linear array.Field radiated by a large plane array is obtained by summing up active element pattern of all elements.With this method a large plane array analysis problem is converted into a small linear array problem,and thereby computational cost is considerably reduced.In addition,a hybrid method using extrapolative method combining with genetic algorithm is proposed for synthesizing desired patterns of large plane arrays.To assess accuracy and efficiency of the hybrid method,a low side lobe 10×10 plane microstrip patch antenna array is synthesized with the method.Calculated results agree well with that by HFSS.

关 键 词：平面阵列天线 子阵 辐射 遗传算法 副瓣抑制 

分 类 号：O451[理学—无线电物理] TN957[理学—物理]