具有抑制谐波性能的新型微带带通滤波器设计  

Design of a Novel Microstrip Bandpass Filter with Harmonic Suppression

作　　者：陈董[1] 黄晓东[1] 程崇虎[1] 

机构地区：[1]南京邮电大学电子科学与工程学院,江苏南京210023

出　　处：《南京邮电大学学报（自然科学版）》2012年第6期7-11,共5页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：国家自然科学基金(61071020);教育部博士点基金(200802930002);南京邮电大学引进人才科研启动基金(NY210074)资助项目

摘　　要：提出了一种新型的具有谐波抑制性能的微带带通滤波器结构,其由一对带有过孔的微带短路环和两段共面波导传输线构成。通过控制两个微带短路环间的距离,可以灵活地调节滤波器的带宽;而通过调节微带短路环两臂的间距和共面波导传输线的长度及两者的相对位置,则可以抑制滤波器的高次谐波,达到展宽阻带的目的。仿真与实测结果表明了该滤波器具有良好的谐波抑制性能。测试的通带中心频率为1.16 GHz,相对带宽为5.2%,在2.0 GHz到9.0 GHz的宽阻带内,谐波抑制水平基本优于-20 dB。A novel microstrip bandpass filter with harmonic suppression is presented,which consists of a pair of microstrip rings with via holes and a couple of coplanar waveguide （CPW） resonators. The band- width can be adjusted by tuning the distance between the microstrip rings. The harmonics in the stopband can be suppressed significantly with the proper distance between the two arms of the ring resonator, the length of the CPW resonator and the tapped points of the microstrip ring resonator and CPW resonator. The simulation and experiment results show that the bandpass filter has good harmonic suppression per- formance. The measured central frequency in the passband is l. 16 GHz ;the relative bandwidth is 5.2%. The band rejection level is better than - 20 dB in a wide stopband from 2.0 GHz to 9.0 GHz.

关 键 词：谐波抑制 带通滤波器 微带线 共面波导 

分 类 号：TN911.7[电子电信—通信与信息系统]