基于交叉耦合新型三角形谐振器滤波器  

A novel triangular resonator filter based on cross-coupling

作　　者：严茂林 张思沫 程勇[1] 李泳 张业荣[1] YAN Maolin;ZHANG Simo;CHENG Yong;LI Yong;ZHANG Yerong(College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology),Nanjing University of Posts and Telecommunications,Nanjing 210023,China;Yun Microwave Electronics Corporation Limited,Hefei 230000,China)

机构地区：[1]南京邮电大学电子与光学工程学院、柔性电子(未来技术)学院,江苏南京210023 [2]合肥云之微电子有限公司,安徽合肥230000

出　　处：《南京邮电大学学报（自然科学版）》2024年第5期28-36,共9页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：国家自然科学基金(61601245)资助项目。

摘　　要：采用高介电常数陶瓷作为介质,设计出一种基于交叉耦合的新型等腰直角三角形谐振器介质波导滤波器,在新型三角形谐振器结构上设计出正耦合与负耦合结构,基于交叉耦合理论,通过引入谐振器之间的正负耦合进行交叉耦合,实现了具有两个传输零点(TZs)的八阶介质波导滤波器。解决了一般介质波导滤波器带外抑制性能差、插损高等缺点,并进一步减小了滤波器的体积。测量结果显示:该滤波器中心频率为3.5 GHz,相对带宽为5.41%,带外3.34 GHz和3.78 GHz处有两个零点,带外抑制在-70 dB以下。A novel isosceles right triangle resonator dielectric waveguide filter based on cross-coupling is designed by using high dielectric constant ceramics as the medium.Positive coupling and negative coupling structures are designed on the new triangular resonator structure.The cross-coupling is carried out by introducing the positive and negative coupling between resonators.An eighth-order dielectric waveguide filter with two transmission zeros(TZs)is implemented.It tackles the disadvantages that common dielectric waveguide filters face,like poor out-of-band suppression and high insertion loss,and further reduces the filters size.Finally,the filter is fabricated and measured.The measurement results show that the center frequency of the filter is 3.5 GHz,the relative bandwidth is 5.41%,and two out-ofband zero points exist at 3.34 GHz and 3.78 GHz,respectively,and the out-of-band suppression is below-70 dB.

关 键 词：等腰直角三角形谐振腔 交叉耦合 介质波导滤波器 

分 类 号：TN713.5[电子电信—电路与系统]