The Quasi-elliptic Bandpass Filter Using Quarter-wavelength Stepped Impedance Resonators
A bandpass filter is designed using two end-connected quarter-wavelength stepped impedance resonators. The quarter-wavelength stepped impedance resonators are implemented by a half-wavelength stepped impedance resonator with its middle shorting to ground. Hence, the modes that the λ/4 stepped impedance resonator supports are the (1+2n)=4 which also occur on the branches of a combline. An enhanced U-shape coupling feed is adopted in the filter design to reduce the insertion losses as well as suppressing the harmonics. The proposed filter has a quasi-elliptic frequency response. An equivalent circuit model is developed and the experiments are conducted for circuit design verification.
Yu-Wei Chen Yen-Ju Liu Min-Hua Ho
Graduate Institute of Communication Engineering and Department of Electronic Engineering Changhua University of Education, Taiwan, China
国际会议
Progress in Electromagnetics Research Symposium 2007(2007年电磁学研究新进展学术研讨会)(PIERS 2007)
北京
英文
743-746
2007-03-26（万方平台首次上网日期，不代表论文的发表时间）