基于电磁带隙结构的新型高温超导低通滤波器  

A NOVEL HTS LOWPASS FILTER USING ELECTROMAGNETIC BAND-GAP STRUCTURE

作　　者：孟庆端[1] 张晓玲[1] 周鲁英[1] 张雪强[2] 何豫生[2] 

机构地区：[1]河南科技大学电子信息工程学院,洛阳471003 [2]超导国家重点实验室中国科学院物理研究所北京凝聚态物理国家实验室,北京100080

出　　处：《低温物理学报》2008年第2期154-157,共4页Low Temperature Physical Letters

基　　金：河南科技大学博士科研启动基金(项目编号:06~7)资助的课题~~

摘　　要：提出了一种基于电磁带隙结构的低通滤波器实现形式,这种新型低通滤波器采用电容周期性加载共面(Coplanar Waveguide)传输线结构的形式.为了减小通带内波纹、显著提高阻带信号抑制,电容单周期性加载结构被调整为电容双周期性加载结构,同时在共面传输线的接地面上引入了双周期性的长方形缺陷地结构.基于上述方案设计制作了一个高温超导低通滤波器,仿真及测试结果表明:低通滤波器的带外抑制平均增加了约20dB,带内传输损耗波纹显著变小.A novel lowpass filter is proposed in this paper, which is designed on a coplanar waveguide （CPW） with Electromagnetic Band-Gap （EBG） structure. In order to suppress passband ripples, the mono-periodic loaded interdigital capacitors structure is modified to double-periodic loaded structure. For higher attenuation in the rejection band without increasing circuit area, two dualperiodic arrays of rectangular patches are etched in the ground planes. A HTS lowpass filter is fabricated using the above described structures. Both simulation and measured results show that the average attenuation in the rejection band for increases about 20dB, and the ripples in the pass band are visibly reduced.

关 键 词：电磁带隙结构 共面波导 高温超导低通滤波器 

分 类 号：TN713.4[电子电信—电路与系统]