摘要
主要研究了智能天线系统前端接收天线阵列中的耦合问题.针对圆形阵列中单元间相互耦合作用引起单元水平面方向图的畸变这一问题,分析了未激励单元的互耦、以及这些单元端接电缆的加载作用对激励单元阵中方向图的影响.依据多端口理论,把所研究的结构等效为多端口网络,提出使用迭代方法求解未激励端口的匹配阻抗.并由结构对称性,提出使未激励端口加载阻抗与激励端口输入阻抗相等,以减小考察单元阵中方向图畸变,降低单元水平方向图不圆度,以满足智能天线系统要求.
The mutual coupling in the antenna array of a smart antenna system is discussed. The aberrance of the horizontal pattern of the pole is described, which is caused by the mutual coupling in the antenna array. During the analysis of the pole pattern, mutual coupling caused by un-excited elements and loading caused by the cable connected to them are considered. According to the theorem of the multi-port system, the configuration is considered as a multi-port system. And the matching impedance of the un-excited port will be calculated by the tumbling method. With configuration symmetry considered, the loading impedance of the un-excited port equals the input impedance of the excited port in order to reduce the aberrance and un-roundness of the horizontal pattern of the pole, thus matching the requirement for the smart antenna system.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2003年第6期802-805,共4页
Journal of Xidian University
基金
国家自然科学基金资助项目(69971017)
