非谐振节点在直线型带通滤波器中的应用  

Application of Nonresonating Nodes in Linear Bandpass Filter

作　　者：郭翔[1] 王锡良[1] 

机构地区：[1]电子科技大学电子工程学院,四川成都611731

出　　处：《雷达科学与技术》2013年第5期561-564,共4页Radar Science and Technology

摘　　要：简述了广义切比雪夫响应、非谐振节点以及极点提取理论,并以此为基础设计了一款直线型带通滤波器。该滤波器采用一种新颖的结构,以非谐振节点的方式,分别成功地在阻带高低端指定频率点处引入了传输零点,使带外抑制提高了15dB以上,插损小于0.5dB,并且保证了滤波器整体的直线型结构,具有一定的实际工程运用价值。文中以中心频率6GHz、带宽1GHz的5腔直线型交指滤波器为例,介绍了滤波器的设计以及引入传输零点的过程,用HFSS进行仿真,结果理想,证明了这种设计的合理性和可行性。The theory of generalized Chcbyshev response,nonresonating nodes and pole extracting is introduced.On the basis,a linear bandpass filter is designed,employing a novel structure with nonresonating nodes.It successfully brings in the transmission zero in the certain frequency out of a bandpass filter＇s passband,which makes the out of band suppression enhance remarkably,larger than 15 dB,and its insert loss is under 0.5dB.The filter also is ensure to be the whole model linear structure,which has value in engineering.In this paper,we take a 5 order linear interdigital filter as the example,whose center frequency is 6 GHz and bandwidth is 1 GHz.The design of the filter and the process how to bring in the zero is presented.It was simulated in HFSS,and the results were ideal,which proves the design reasonable and feasible.

关 键 词：直线型带通滤波器 非谐振节点 传输零点 

分 类 号：TN713[电子电信—电路与系统]