第二通带可调的双通带滤波器设计  

A design of dual-band bandpass filter with tunable upper passband

作　　者：孙晨霞[1] 冯立营[1] 

机构地区：[1]天津职业技术师范大学天线与微波技术研究所,天津300222

出　　处：《天津职业技术师范大学学报》2012年第1期9-11,共3页Journal of Tianjin University of Technology and Education

基　　金：国家自然科学基金资助项目(60871026)

摘　　要：研究了一种双通带带通滤波器,构成方法是在等腰直角三角形阶梯阻抗开路环内部通过微带线连接一个三角形贴片。滤波器第一通带的中心频率取决于开路环传输线的长度,第二通带的中心频率由贴片、连接微带线和开路环三者的尺寸共同决定。改变贴片斜边边长,可以调节第二通带的中心频率,同时保持第一通带中心频率和带宽不变。仿真结果验证了设计方法的有效性。A microstrip dual-band bandpass filter is developed.In an orthogonal isosceles triangular stepped-impedance open-loop,an amplectant triangular patch is conected by a microstrip line with the open-loop.The first passband of the filter is decided by the length of the triangular open-loop,and the second band is done by the triangular patch,microstrip line and open-loop.The size of the patch can be changed,and the central frequency of second passband can be tuned.At the same time the first passband width and frequency,and the circuit outline are fixed.The results are verified.

关 键 词：带通滤波器 开路环谐振器 三角形贴片 

分 类 号：TN713[电子电信—电路与系统]