一种利用耦合阻抗改善天线阵列匹配的方法  

A New Method of Matching the Antenna Array Base on Coupling Impedance

作　　者：王永光[1] 雷振亚[1] 谢拥军[1] 刘秀祥[1] 徐银芳[1] 

机构地区：[1]西安电子科技大学天线与微波国家重点实验室,西安710071

出　　处：《电子器件》2010年第5期608-612,共5页Chinese Journal of Electron Devices

摘　　要：提出一种利用无源辐射贴片寄生阵与阵列单元之间互耦效应Smnqp(第mn个天线单元与第qp个无源贴片之间的耦合系数),改善天线阵驻波特性的方法。分析Smnqp与天线阵单元之间耦合系数Smn(m≠n),增益,回波损耗Smn(m=n)的关系,可以得出适当的Smnqp可以降低天线驻波,而根据文献(10)的描述,在天线增益不变的情况下,Smn(m≠n)应该增大。实际应用中,可以通过修改贴片尺寸改变Smnqp。如果合理应用,可以优化天线性能。基于上述理论,设计3×3矩阵并对HFSS仿真结果进行分析,得出Smnqp对天线回波损耗,增益,等各种性能的影响。Relying on the introduction of mutual coupling Smnqp（the coupling coefficient between the mn array unit and the qp passive patch unit） between passive patch and array elements,a novel method for antenna array design is proposed.By analysing the relationship of mutual coupling Smnqp and return wave loss Smn,（m=n）,gain,coupling coefficient Smn（m≠n） between array elements,it find out that proper Smnqp will lead to the decrease of Smn,（m=n）.And assuming the gain keeps constant,the Smn（m≠n） should increase according to theory.We can change the Smnqp by changing size of passive patch.If used properly,it can improve the performance of antenna array.Based on this conclusion,a 3×3 rectangular array is designed.According to the analysis of the simulation results,we can see that the proper size of passive patch can reduce the Smn,（m=n） with the antenna gain reduce.

关 键 词：无源辐射贴片寄生阵 互耦阻抗.TIF S参数 天线效率 

分 类 号：TN821[电子电信—信息与通信工程]