方向图可重构宽带准八木天线的设计  

Design of Broadband Quasi-Yagi Antenna with Pattern Reconfigurability

作　　者：王安国[1] 刘楠[1] 兰航[1] 

机构地区：[1]天津大学电子信息工程学院,天津300072

出　　处：《天津大学学报》2011年第10期872-877,共6页Journal of Tianjin University(Science and Technology)

基　　金：国家重点基础研究发展计划(973计划)资助项目(2007CB310605)

摘　　要：为了满足新型无线通信系统的需要,设计了一种宽带方向图可重构准八木天线.可重构准八木天线以基本准八木天线的结构为基础,在基本准八木天线结构的设计中,激励振子的两臂分别印制在介质板两侧,从而简化了馈电结构,减小了天线尺寸.该天线具有宽频带及工作频带上增益变化相对较小等优点.控制开关的通断状态,天线在xoy面的方向图可以分别指向4个方向.用电磁仿真软件对所提出的天线结构进行了分析与优化,并对所设计的天线进行了实际制作和测试,测试与仿真结果吻合较好,验证了该天线的可行性.To meet the requirement of new wireless communication systems, a broadband quasi-Yagi antenna with pattern reconfigurability was presented. The reconfigurable quasi-Yagi antenna was designed based on the prototype of the quasi-Yagi antenna. The two arms of the driver dipole in the antenna prototype were printed separately on the opposite sides of the dielectric substrate. The feed structure of the antenna was simplified and the size of antenna was reduced. The impedance bandwidth of the proposed antenna was excellent, and the gain variation within operating bandwidth was relatively small. By controlling the states of the switches, the main beam of the proposed antenna in the xoy plane could be shifted to each one of four angles. Using the full-wave electromagnetic simulator, the parameters of antenna were analyzed and optimized. The antenna was fabricated and measured. The simulation results were in good agreement with the measurement results, which demonstrated the validity of the proposed antenna.

关 键 词：可重构天线 方向图 准八木天线 宽频带 

分 类 号：TN82[电子电信—信息与通信工程]