一种改善天线阵性能的互耦匹配法  

Method of Improving Antenna Performance Using Mutual Coupling Matching

作　　者：朱永忠[1] 谢拥军[2] 雷振亚[2] 

机构地区：[1]长安大学信息工程学院,西安710064 [2]西安电子科技大学天线与微波技术国家重点实验室,西安710071

出　　处：《电子器件》2009年第4期817-820,共4页Chinese Journal of Electron Devices

基　　金：武器装备预研基金资助(9140A24050407DZ01)

摘　　要：提出了一种利用互耦来改善阵列天线驻波特性的方法。利用等效网络法分析了阵列天线的互阻抗和散射矩阵、互耦与天线增益的关系。从而得出在阵列天线的增益保持不变的情况下。增大耦合矩阵中的耦合元素│Smn│(m≠n),则反射系数Snn必然下降的结论。由此设计了一种小型化的四元顶部加载的单极子天线阵列。在满足天线方向图设计要求的前提下,通过在天线顶部采用印刷铜线进一步加强单元间的耦合,有效地改善了天线的驻波。By using the equivalent network model, this paper mainly analyses the relationship among the relation of impedance matrix and S-parameter matrix, coupling matching and gain respectively. It finds out that,assuming the gain keeps constant,the increase of ｜Smn｜ （m≠n）will sure lead to the decrease of ｜Sm｜ in the scattering matrix. This relation can be used together with mutual coupling, and if used properly, it can improve the performance of antenna array. Under the guidance of this theory, a miniaturization circular antenna array of four monopoIe antennas loaded disc is designed. Provided the antenna gain is invariable and pattern is correct, the design can improve the VSWR by using printed patch on the substrate of antenna top.

关 键 词：天线阵互耦 S参数增益 

分 类 号：TN821[电子电信—信息与通信工程]