基于对偶复合左右手单元小型化带阻滤波器设计

提出了基于对偶复合左右手(Double Composite Right／Left-Handed Cell，DCRLH)单元的小型化带阻滤波器设计方案。通过对DCRLH单元等效电路模型的理论分析证明该结构在平衡状态下左右手通带无法合并,具有天然的带阻特性。对DCRLH微带形式的结构参数进行了扫描分析,发现在准平衡状态下,阻带特性非常优良。基于上述研究结论,设计实现了带阻滤波器。该带阻滤波器性能优良,并且仅使用了一个DCRLH单元,尺寸紧凑。仿真测试结果证明了本文设计方法的正确性。

Design of Miniaturized Band-stop Filter Based on Dual Composite Right/left-handed Cell

In this article,a miniaturized band-stop filter based the dual composite right/left-handed(DCRLH)CM)]cell is proposed. Through the theoretical analysis of the equivalent circuit model of DCRLH, it is demonstrated that the right and left-handed pass-bands of DCRLH cannot be integrated even in the balanced condition and thus DCRLH cell exhibits inherently band-stop property. Through parametric scanning analysis, it is found that the band-stop property is quite excellent in the quasi-balanced condition. Based on the above results of the investigation, a band-stop filter is designed and fabricated further. The performance of the proposed band-stop filter is rather satisfactory. Simultaneously, its effective area is quite compact, because only one DCRLH cell is utilized. Both the simulated and measured results verify that the proposed design method is effective.