提出一种新颖的蝴蝶结形缺陷接地结构(DGS)微带线,分析了该微带线的带阻特性和慢波特性.同时考虑微带线损耗,建立了该微带线的等效电路模型及其参数提取,并分析了蝴蝶结形DGS结构变化对阻带特性的影响.最后将该DGS结构应用于紧凑结构低通滤波器的设计,模拟结果与实验结果吻合较好,验证了所提结构的可靠性.

A novel butterfly shape defected ground structure for microstrip line was proposed. Its band gap characteristics and slow wave characteristics were discussed. Including the transmission loss, equivalent circuit modeling for the proposed microstrip line was built and its parameters were extracted. The effects of DGS dimensions on stop band characteristics were presented. Furthermore, a compact DGS low pass filter was designed and measured. The validity of the DGS filter is verified by the agreement between simulated and measured results.