基于耦合矩阵的新型8阶SIW带通滤波器  

Novel 8th order SIW bandpass filter based on coupling matrix

作　　者：曾翰森 徐正 张鹏飞 陈世龙 Zeng Hansen;Xu Zheng;Zhang Pengfei;Chen Shilong(Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 101400,China;School of Electronic Electrical and Communication Engineering,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院空天信息创新研究院,北京101400 [2]中国科学院大学电子电气与通信工程学院,北京100049

出　　处：《电子测量技术》2025年第2期1-6,共6页Electronic Measurement Technology

基　　金：国家自然科学基金(42327801)项目资助。

摘　　要：针对传统Ku波段带通滤波器尺寸大以及集成难度高的问题,本文结合LTCC工艺,提出了一种新型8阶是SIW带通滤波器。通过设计耦合矩阵并调节各腔体之间的耦合系数,使该滤波器具有良好的耦合拓扑结构,8个SIW腔体间通过电磁混合耦合方式连接,具有宽带宽、高带外抑制的优点。为了减小整体体积,采用多层板SIW技术,将8个SIW腔体分为上下两层,每层各4个腔体,有效减小了滤波器的体积。在微带和SIW连接处采用共面波导耦合,实现了在带外具有两个传输零点,可抑制寄生通带,进一步提升带外性能。实验结果显示,该滤波器带宽约为13.3~17.2 GHz,相对带宽FBW26%,带内插损<-2.2 dB,18~20 GHz范围内带外抑制>-20 dB。To address the issues of large size and integration difficulty in traditional Ku-band bandpass filters,this paper proposes a novel 8th-order SIW bandpass filter utilizing LTCC technology.By designing a coupling matrix and adjusting the coupling coefficients between the cavities,the filter features an effective coupling topology,with eight SIW cavities interconnected through electromagnetic hybrid coupling,achieving wide bandwidth and high out-of-band rejection.To reduce overall volume,the multilayer plate SIW technique is used,the eight SIW cavities are divided into two layers,with four cavities on each layer,the filter′s volume is significantly reduced.Coplanar waveguide coupling is employed at the microstrip and SIW junctions,introducing two transmission zeros in the out-of-band region to suppress spurious passbands and further enhance out-of-band performance.Experimental results show that the filter has a bandwidth of approximately 13.3~17.2 GHz,a relative bandwidth(FBW)of 26%,an in-band insertion loss of less than-2.2 dB,and out-of-band rejection greater than-20 dB in the 18~20 GHz range.

关 键 词：SIW带通滤波器 耦合矩阵 电磁混合耦合 

分 类 号：TP2[自动化与计算机技术—检测技术与自动化装置] TN61[自动化与计算机技术—控制科学与工程]