应用DGS结构的新型耦合SIR滤波器设计  

A new design for coupling SIR filter using DGS structure

作　　者：冯丰[1] 肖高标[1] 

机构地区：[1]上海交通大学电子工程系,上海200240

出　　处：《信息技术》2007年第3期59-62,共4页Information Technology

摘　　要：主要对SIR滤波器在两方面进行了改进。采用了DGS结构和新型的耦合方式,增强了耦合,为滤波器提供了更多的零点抑制寄生通带的影响。根据理论原理,设计了基于4阶低通原型滤波器结合新结构的SIR带通滤波器,通过HFSS仿真结果看出,该方法能够有效抑制带外寄生通带的影响,对寄生通带的抑制可以达到40dB左右。This paper makes progress for the design of SIR filters in two ways. First, it uses a new kind of coupling method in the SIR filter and second, it combines the DGS structure with the newly designed filter to provide more suppression in the spurious passband. The proposed technique is used to design a 4th order filter. The HFSS simulation results show that about 40 dB suppression in the spurious passband can be achieved.

关 键 词：SIR DGS结构 耦合 寄生通带 

分 类 号：TN713[电子电信—电路与系统]