基于新型缺陷地谐振器结构的超宽带带通滤波器仿真设计  

Simulation and design of ultra-wideband bandpass filter based on novel defect ground structure resonator

作　　者：姚廷波 YAO Ting-bo(Southwest China Research Institute of Electronic Equipment,Chengdu 610036,China;Sichuan Province Engineering Research Center for Broadband Microwave Circuit High Density Integration,Chengdu 610036,China)

机构地区：[1]西南电子设备研究所,四川成都610036 [2]四川省宽带微波电路高密度集成工程研究中心,四川成都610036

出　　处：《磁性材料及器件》2024年第5期60-64,共5页Journal of Magnetic Materials and Devices

摘　　要：提出了一种使用新型缺陷地面结构谐振器和交指电容微带的超宽带带通滤波器,通过级联微带高通滤波器和低通滤波器来构建。具有6 GHz的3 dB截止频率的低通滤波器由顶部平面上的加宽微带线和“地”平面上的组合开环缺陷地面结构构成,实现了高选择性和良好的阻带性能。高通滤波器由顶部平面上的微带交指电容和“地”平面上的开环缺陷地面结构组成,产生了两个传输零点和陡峭的选择性。设计的超宽带带通滤波器具有2.5 GHz的3 dB带宽,中心频率位于4.8 GHz,呈现出尖锐的截止频率响应;同时还表现出良好的阻带性能,从DC到3.45 GHz的下阻带和从6.4到12 GHz的上阻带,抑制优于20 dB。An ultra-wideband bandpass filter using a new defected ground structure resonator and interfinger-capacitor microstrip is proposed,which is constructed by a cascading microstrip high-pass filter and a low-pass filter.The low-pass filter with a 3 dB cutoff frequency of 6 GHz is composed of a widened microstrip line on the top plane and a combined open-loop defect ground structure on the ground plane,achieving high selectivity and good stopband performance.The highpass filter consists of a microstrip interfinger capacitor in the top plane and an open-loop defect ground structure in the ground plane,resulting in two transmission zeros and steep selectivity.The designed ultra-wideband bandpass filter has a 3 dB bandwidth of 2.5 GHz and a center frequency of 4.8 GHz,showing a sharp cut-off frequency response.It also exhibits good stopband performance,with lower stopband from DC to 3.45 GHz and upper stopband from 6.4 to 12 GHz,suppressing better than 20 dB.

关 键 词：带通滤波器 缺陷地结构 谐振器 阻带 带宽 截止频率 

分 类 号：TN713[电子电信—电路与系统]