Title :
Microstrip low-pass filter with wide stopband using coupled-line hairpin unit
Author :
Wei, Feng ; Chen, Lei ; Shi, Xiao-Wei ; Tian, Jin ; Huang, Qiu-Lin
Author_Institution :
Nat. Key Lab. of Antennas & Microwave Technol., Xidian Univ., Xi´´an, China
Abstract :
A novel low-pass filter (LPF) with sharp cutoff frequency response and wide rejection bandwidth is proposed in this paper. The proposed LPF is composed of microstrip coupled-line hairpin unit, semicircle defected ground structures (S-DGS) and semicircle stepped-impedance shunt stubs (S-SISS). Sharp roll-off skirt and good out-of-band rejections are achieved as demonstrated in both simulation and experiment.
Keywords :
band-stop filters; low-pass filters; microstrip filters; microstrip lines; coupled-line hairpin unit; microstrip low-pass filter; out-of-band rejections; semicircle defected ground structures; semicircle stepped-impedance shunt stubs; sharp cutoff frequency response; sharp roll-off skirt; wide stopband; Couplings; Cutoff frequency; Etching; Geometry; Impedance; Low pass filters; Microstrip filters; Microwave filters; Microwave technology; Transmission lines; Coupled-line hairpin unit; Defected ground structure; Low-pass filter (LPF);
Conference_Titel :
Environmental Electromagnetics, 2009. CEEM 2009. 5th Asia-Pacific Conference on
Conference_Location :
Xian
Print_ISBN :
978-1-4244-4344-4
DOI :
10.1109/CEEM.2009.5304104
