新型螺旋形缺陷地结构在低通滤波器中的应用  

Applications of Novel Spiral-shaped Defected Ground Structure to Lowpass Filter

作　　者：杨永杰[1] 隋会静[1] 周立衡[1] 陈建新[1] 包志华[1] 

机构地区：[1]南通大学电子信息学院,江苏南通226019

出　　处：《南京理工大学学报》2010年第6期795-798,共4页Journal of Nanjing University of Science and Technology

基　　金：国家自然科学基金(60901041);国家科技型中小企业技术创新基金(09C26213103647);南通市科技计划(K200804;K2009015;AL2009020;AA2008017;AA2009034)

摘　　要：为使缺陷地结构（DGS）实现结构紧凑、阻带可控,提出了一种新型紧凑型螺旋形DGS。研究了该螺旋型DGS模式下的缝隙影响,对其参数进行了分析与优化。在不改变DGS总体尺寸的情况下,可以通过缝隙位置改变阻带频率。在该螺旋形DGS中的多个位置引入缝隙以实现多频点抑制来增加滤波器的阻带宽度,将两个带有多缝隙的螺旋型DGS单元级联并将其应用于低通滤波器设计。该滤波器的仿真分析及测量结果一致,在0~1.8 GHz通带内插入损耗小于1 dB且在2.0~3.8 GHz阻带内抑制超过20 dB。A novel spiral-shaped defected ground structure（DGS）is proposed to realize the compact size and controllable stopband of DGS.The slit effect of the proposed DGS pattern is researched,and its parameters are analyzed and optimized.The location of the slit can shift the bandstop frequency without changing the overall size of the DGS.Several slits are added to the spiral-shaped DGS to realize the multi-frequency suppression to increase the stopband width of filters.Two spiral-shaped DGSs with several slits are cascaded and applied in lowpass filter design.The simulation analysis and measured results are in good agreement.The passband insertion loss is less than 1 dB from 0 to 1.8 GHz,while the stopband rejection is more than 20 dB from 2.0 to 3.8 GHz.

关 键 词：螺旋形 缺陷地结构 低通滤波器 缝隙 阻带 

分 类 号：TN710.6[电子电信—电路与系统]