一种新颖的PBG宽阻带低通滤波器  

A Novel Photonic Band-Gap Microstrip Structures for Low-Pass Filers of Wide Stop-Band

作　　者：刘海文[1] 孙晓玮[2] 程知群[2] 李征帆[1] 

机构地区：[1]上海交通大学电子工程系,上海200030 [2]中国科学院上海微系统与信息技术研究所,上海200050

出　　处：《电子学报》2004年第5期791-794,共4页Acta Electronica Sinica

基　　金：国家 8 63高科技计划 (No.2 0 0 2AA1 352 70 );上海市应用材料研究与发展基金 (No.0 1 0 9)

摘　　要：本文首次提出综合PBG结构和微带线结构两因素 ,来设计滤波器的概念 .与普通PBG结构滤波器不同的是 ,本文采用具有T形和十字形短截线的微带线代替直线微带线 ,在接地板上只需刻蚀一列PBG结构即可构成宽阻带低通滤波器 .文中以T形短截线PBG结构的低通滤波器为例 ,运用时域有限差分法 (FDTD) ,分析了在不同短截线长度和PBG结构方孔边长的情况下 ,该滤波器的传输特性 .文中还给出了该滤波器和Rumsey方法与Kim方法设计的级联、并联两种PBG结构低通滤波器的传输特性的模拟结果及其对比分析 .最后 ,文中给出了模拟结果和测试结果 ,来验证所设计的低通滤波器的有效性 .Two novel low-pass filters (LPFs) of wide stop-band synthesizing both the structure of photonic band-gap (PBG) and the structure of microstrip are proposed in this paper.Compared with the conventional PBG filters with the straight microstrip line,one of the proposed filters is implemented by a one-line PBG microstrip structure with T-junction opened stubs and its transmission characteristics are discussed.The other is implemented by a one-line PBG microstrip structure with cross-junction opened stubs.The transmission characteristics of the proposed filter and the filters designed by the Rumsey's method and Kim's method are presented and discussed.The new wide-band harmonic rejection LPFs are easy to design and fabricate.Finally,The simulated and experimental results verify the validity of the LPFs.

关 键 词：低通滤波器 光子带隙 微带线 时域有限差分法(FDTD) 缺陷接地结构 

分 类 号：TN45[电子电信—微电子学与固体电子学] TN713