基于CRLH传输线的微带漏波天线的研究与设计  

Design of microstrip leaky wave antenna based on composite right/left handed transmission line

作　　者：熊鑫[1] 余利华[1] 戴亚文[1] 吴延超 XIONG Xin;YU Lihua;DAI Yawen;WU Yanchao(College of Science, Wuhan University of Technology, Wuhan 430070, China)

机构地区：[1]武汉理工大学理学院,湖北武汉430070

出　　处：《电子元件与材料》2017年第1期62-67,共6页Electronic Components And Materials

摘　　要：提出了一种基于谐振频率的等效电路参数提取方法,该方法可以精确地描述多节复合左右手传输线结构,并通过仿真软件研究了其物理模型及等效电路模型的一致性,从而验证了这种新的参数提取方法。根据此种新的等效模型设计制作了复合左右手传输线型微带漏波天线,并利用网络分析仪对它的S参数进行了测量。结果表明,所设计的平衡状态下的微带漏波天线波束方向随着频率的变化而变化,并且改变传统漏波天线仅能实现前半空间扫描的局限性,并拓展漏波天线扫描范围至全空间,同时在各个波束方向上的能量也较为均匀,相比于传统漏波天线,尺寸缩小接近50%。A new equivalent circuit model was established and a new parameter extraction method which could exactly describe the structure of composite right/left-handed transmission line with many nodes was put forward. The new method of parameter extraction was proved by using the simulation software to study the consistency of physical model and equivalent circuit model. The leaky-wave antenna object of composite right/left-handed transmission line was designed andmade referring to the new equivalent model. S parameters of the antenna were measured by the network analyzer. Results show, the beam direction of the microstrip leaky-wave antenna with right/left-handed transmission line can change with frequency change, the boundedness of traditional leaky-wave antenna only scan the first half of the space is changed and the scan scope expands to the whole space. Besides, the energy in each beam direction is more uniform. Its size decreases by about 50% compared with traditional leaky-wave antenna.

关 键 词：漏波天线 复合左右手传输线 等效电路 参数提取 波束扫描 辐射特性 

分 类 号：TN820[电子电信—信息与通信工程]