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 modelwas established and a new parameter extractionmethodwhich could exactly describe the structure of composite right/left-handed transmission line with many nodeswas put forward. The new method of parameter extractionwas proved by using the simulation software to study the consistency of physical model and equivalent circuit model. Theleaky-wave antenna object of composite right/left-handed transmission linewas designed and made referring to the new equivalent model.Sparameters of the antenna were measuredbythenetwork analyzer. Results show,thebeam direction of themicrostrip leaky-wave antennawithright/left-handed transmission linecan changewith frequency change,the boundednessof traditionalleaky-wave antenna onlyscan the first half of the spaceis changedandthe scan scopeexpandstothe whole space. Besides, the energy in each beam direction is more uniform. Its size decreases by about 50% compared with traditional leaky-wave antenna.
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