基于缺陷地结构的小型化双频带带通滤波器  

Miniaturized dual-band bandpass filter using defected ground structure

作　　者：张洪欣[1,2] 张旭东[1] 贺鹏飞[3] 

机构地区：[1]北京邮电大学电子工程学院,北京100876 [2]安全生产智能监控北京市重点实验室(北京邮电大学),北京100876 [3]烟台大学光电信息技术学院,烟台264005

出　　处：《电波科学学报》2016年第2期363-367,共5页Chinese Journal of Radio Science

基　　金：国家自然科学基金(61571063,61202399)

摘　　要：提出了一种新型的基于缺陷地结构的双频带带通微带滤波器.缺陷地结构采用双模开口谐振环形式,并使用不同组合方式的双模开口谐振环产生两个通带.滤波器的两个工作中心频率分别为3.5GHz和5.8GHz,其中第一个频带涵盖了所有全球微波互联接入的应用频段,第二个频带可以应用于雷达设备.为了进一步证实这款滤波器的性能,基于Roggers RT5880板材制作了滤波器实物,整体滤波器的大小仅为20mm×20mm,测量数据和仿真结果吻合较好,并且有两个传输零点,可以满足工程上的需要.A novel band-pass microstrip filter using defected ground structure （DGS） is proposed. Dual-mode split-ring resonator （SRR） is utilized to form the DGS structure so that different passband can be obtained by different types of dual-mode SRRs, and the center frequencies of the filter is 3.5 GHz and 5.8 GHz, respectively. The first passband contains the whole application frequencies of worldwide inter- operability for microwave access and the second passband can be used for radar system. For validating the filter further, a filter based on Roggers RT5880 is fabricated. The measured results agree well with the simulated results. The insertion loss within each passband is less than 2 dB and two transmission zeros are obtained, which meets the engineering requirements, and the overall size of the filter is 20min× 20mm.

关 键 词：缺陷地结构 小型化 双模开口谐振环 微带带通滤波器 

分 类 号：TN713.5[电子电信—电路与系统]