一种低辐射损耗的N78频段微带滤波器设计  

Design of N78 band microstrip filter with low radiation loss

作　　者：陈铭铭 饶云博 程序[2,3] 王丽丽 韦博 CHEN Mingming;RAO Yunbo;CHENG Xu;Wang Lili;WEI Bo(School of Communication Engineering,Hangzhou Dianzi University,Hangzhou Zhejiang 310018,China;Institute of Electronic Engineering,China Academy of Engineering Physics,Mianyang Sichuan 621999,China;Microsystem&Terahertz Research Center,China Academy of Engineering Physics,Chengdu Sichuan 610299,China;School of Logistics,Chengdu University of Information Technology,Chengdu Sichuan 610225,China)

机构地区：[1]杭州电子科技大学通信工程学院,浙江杭州310018 [2]中国工程物理研究院电子工程研究所,四川绵阳621999 [3]中国工程物理研究院微系统与太赫兹研究中心,四川成都610299 [4]成都信息工程大学物流学院,四川成都610225

出　　处：《杭州电子科技大学学报(自然科学版)》2025年第1期19-27,102,共10页Journal of Hangzhou Dianzi University:Natural Sciences

基　　金：钒钛资源综合实验室资金项目(2022FTSZ04)。

摘　　要：保障无线通信系统传输离不开性能良好的滤波器。微带滤波器凭借其小型化的体积以及易集成的特点被广为采用,然而传输频率提高会使微带滤波器的能量损耗大大增加,尤其是辐射损耗的增大,继而增加传输损耗,降低传输效率。针对这个问题,结合多层结构和缺陷的结构(Defected Ground Structure, DGS),使用优化尺寸参数后的工字型谐振器,并引入传输零点,设计了一款N78频段的三阶带通微带滤波器。经仿真,滤波器的整体辐射损耗小于0.1 dB,中心频率为3.55 GHz,相对带宽为22.3%,回波损耗为-22 dB,面积为0.67λ_(g)×0.5λ_(g)。该滤波器能够较好地减小辐射损耗,亦能更好地实现小型化,具有实用价值。The transmission of wireless communication system is not able be guaranteed without an excellent filter.Microstrip filter is widely used because of its miniaturized volume and easy integration characteristics.However,high frequency will greatly increase the energy loss of microstrip filter,especially the radiation loss,which will increase the transmission loss and reduce the transmission efficiency.To solve this problem,a N78-band third-order bandpass microstrip filter is designed by combining multi-layer structure with defected ground structure(DGS),using three optimized I-shaped resonators and introducing transmission zero.According to the simulation,the radiation loss of the filter is less than 0.1 dB,the center frequency is 3.55 GHz,the fractional bandwidth is 22.3%,the return loss is-22 dB,and the area is 0.67λ_(g)×0.5λ_(g).The filter can commendably reduce the radiation loss and realize the miniaturization,which has practical value.

关 键 词：微带滤波器 低辐射损耗 N78频段 工字型谐振器 多层结构 

分 类 号：TN713[电子电信—电路与系统]