基于SIR的低损耗双频宽带滤波器  

Low Loss Dual-Band Wideband Filter Based on SIR

作　　者：张梦璐 孙鑫营 荣垂才[1] 徐赟 廖昱博[1] ZHANG Menglu;SUN Xinying;RONG Chuicai;XU Yun;LIAO Yubo(School of Physics and Electronic Information,Gannan Normal University,Ganzhou 341000,China)

机构地区：[1]赣南师范大学物理与电子信息学院,江西赣州341000

出　　处：《压电与声光》2024年第5期660-663,共4页Piezoelectrics & Acoustooptics

基　　金：江西省教育厅科技项目(GJJ2201211,GJJ180752);赣州市重点研发项目(2022B-GY9645);江西省自然基金项目(20202BABL201022);教育部产学合作协同育人项目(230704307200932)。

摘　　要：提出一种采用折叠阶跃阻抗谐振器结构的双频微带带通滤波器。利用新型平行电耦合方式实现了滤波器的小型化,引入零度馈电结构产生传输零点以改善带外抑制性能。实验结果表明,该滤波器结构紧凑,损耗低,带外抑制性能好,且通带的中心频率分别为2.4 GHz和5.2 GHz,带内性能良好,最小插损分别为0.72 dB和0.69 dB。In this study,a dual-frequency microstrip bandpass filter with a folded step impedance resonator structure is proposed.The filter is miniaturized by a novel parallel electrical coupling method,and the zero-degree feed structure is introduced to generate transmission zero points to improve the out-of-band suppression performance.The experimental results show that the filter has a compact structure,low loss,and good out-of-band rejection performance.The center frequency of the passband is 2.4 GHz and 5.2 GHz,respectively.The in-band performance is good,and the minimum insertion loss is 0.72 dB and 0.69 dB,respectively.

关 键 词：阶跃阻抗谐振器 双频带 宽带 零度馈电 低损耗 

分 类 号：TN713[电子电信—电路与系统] TN92