基于奇偶模分析法的四模谐振器结构的双通带带通滤波器设计  

The Design of Dual-Band Bandpass Filter Using Novel Quadruple-Mode Resonator Based on Odd-and Even-Mode Method

作　　者：张德伟[1] 王树兴[1] 刘庆[1] 周东方[1] 张毅[1] 吕大龙[1] 吴瑛[1] 

机构地区：[1]解放军信息工程大学信息系统工程学院,河南郑州450002

出　　处：《电子学报》2018年第2期387-392,共6页Acta Electronica Sinica

基　　金：核高基重大项目(No.2015-ZX01010001-003)

摘　　要：提出了一款基于四模谐振器的新型双通带带通滤波器.设计的四模谐振器基于微带线结构,由四个开路枝节和一个短路枝节组成.两次采用奇偶模分析法对该四模谐振器结构进行分析.该四模谐振器的每个模式能够实现独立调节,同时每两个模式形成一个通带.采用源与负载耦合的馈电方式,提高滤波器的带外抑制性.该滤波器具有四个传输零点和四个传输极点.测试结果表明,该双模双通带滤波器工作于2.08GHz和6.07GHz,3d B带宽分别为11.06%和7.74%.设计的滤波器具有紧凑的结构,只有0.28λg×0.11λg大小.A new-type dual-band bandpass filter using a novel quadruple-mode resonator is proposed. This quadruplemode resonator consists of four open-stubs and one short-stub. The odd-and even-mode method is adopted twice to analyze this resonator and good conclusions are given. Each resonant mode of the quadruple-mode resonator can be tuned independently. Each two modes form a passband of the filter. Source-load coupling is introduced to improve out-band rejection. To testify the proposed theory and resonator structure, a high-selectivity dual-band bandpass filter is designed and fabricated. The measured results show that it has four transmission zeros and four transmission poles. This filter is centered at 2. 08/ 6. 07GHz with 3dB bandwidths 11.06%/7. 74% respectively and it has a compact size,only 0. 28kg ×0. 11kg.

关 键 词：带通滤波器 双通带 四模谐振器 奇偶模分析法 高选择性 

分 类 号：TN715[电子电信—电路与系统]