Ku频段梳状滤波器小型化设计  

Design on Miniaturized Ku-band Comb Filter

作　　者：王新 李其强 杨凯 WANG Xin;LI Qiqiang;YANG Kai(The 54th Research Institute of CETC,Shijiazhuang 050081,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电工程》2018年第7期597-600,共4页Radio Engineering

基　　金：装备发展部预研领域基金资助项目(61402090101)

摘　　要：为满足微波电路小型化的需求,设计了一款基于陶瓷基板的Ku频段梳状带通滤波器。小型化的滤波器由一系列耦合的阶梯阻抗谐振器组成,采用抽头结构作为输入输出变换。基于传统滤波器的设计方法,通过合理设计滤波器版图,引入交叉耦合,提高高频阻带抑制度。测试结果显示,滤波器中心频率为12.5 GHz,相对带宽8%,中心频率插入损耗1.85 dB,在14 GHz频率处阻带抑制>40 dB。滤波器尺寸2.4 mm×2.1 mm(0.1λ_0×0.087 5λ_0)。A novel Ku-band fourth-order comb bandpass filter（ BPF） using ceramic substrate is designed to meet the development of microwave circuit miniaturization.The miniaturized comb bandpass filter adopts an array of stepped-impedance resonators（SIR） with tapped-transformer coupling at input and output.Based on the design method of traditional filter,the high-frequency stopband suppression is improved by designing the filter layout and introducing cross-coupling.The test results show that the insertion-loss is 1.85 dB at 12.5 GHz with a fractional bandwidth of 8%.The stop-band suppression is better than 40 dB at 14 GHz.The size of the filter is 2.4 mm×2.1 mm（ 0.1 λ0×0.087 5 λ0）.

关 键 词：带通滤波器 梳状滤波器 阶梯阻抗谐振器 陶瓷基板 KU频段 

分 类 号：TN256[电子电信—物理电子学]