一种适用于WLAN的紧凑型微带双频带通滤波器设计  

A Compact Microstrip Dual-Band Pass Filter Design for WLAN

作　　者：刘桂英 LIU Guiying(Electromechanical College,Communist Youth Vocational College of Science and Technology,Jiujiang Jiangxi 332020,China)

机构地区：[1]共青科技职业学院机电学院

出　　处：《电子器件》2019年第4期935-941,共7页Chinese Journal of Electron Devices

基　　金：江西省自然科学基金研究项目(20142BAB207008)

摘　　要：针对无线局域网应用中的高性能双频带滤波器设计问题,提出了一种高选择性紧凑型微带双频带通滤波器。该设计采用不平衡复合左右手传输线CRLHTL(Composite Right/Left-Handed Transmission Line)来实现双频带功能,其结构由位于两个微带线之间的串联叉指电容组成,并通过通孔短路到接地面。带有微带线的通孔作为并联电感,而串联电容则由叉指电容实现。为了具体验证分析,对提出的双频滤波器进行了实际制造并测试。结果显示,模拟和测量结果呈现良好的一致性。与现有的类似滤波器相比,提出滤波器的尺寸更为紧凑,仅为0.16λg×0.046λg,且具有易于制造、高选择性、低插入损耗和高回波损耗等优点。Aiming at the high performance dual-band filter design problem in wireless LAN applications,a highly selective compact microstrip dual-band pass filter is proposed.The design uses a composite right/left-handed transmission line(CRLHTL)to implement a dual-band function.This structure consists of a series of interdigital capacitors located between two microstrip lines and short-circuited to the ground plane through the vias.The via with the microstrip line acts as a shunt inductor,while the series capacitor is implemented by the interdigital capacitor.For the specific verification analysis,the proposed dual-frequency filter was actually fabricated and tested.The results show that the simulations and measurements show good agreement.Compared with the existing similar filters,the proposed filter is more compact,only 0.16λg×0.046λg,and has the advantages of easy manufacture,high selectivity,low insertion loss and high return loss.

关 键 词：无线局域网 带通滤波器 双频带 复合左右手传输线 紧凑尺寸 

分 类 号：TN713[电子电信—电路与系统]