Title :
UWB bandpass filter with two notch-bands based on SCRLH resonator
Author :
Wei, F. ; Gao, C.-J. ; Liu, B. ; Zhang, H.-W. ; Shi, Xiao-Wei
Author_Institution :
Nat. Key Lab. of Sci. & Technol. on Antennas & Microwaves, Xidian Univ., Xi´an, China
Abstract :
A compact ultra-wideband (UWB) bandpass filter (BPF) with two sharply rejected notch-bands and wide stop-band is presented. The proposed UWB BPF is realised by cascading two interdigital hairpin resonator units, a coupled simplified composite right-left-handed (SCRLH) resonator, a semi-circle defected ground structure (S-DGS) and a semicircle stepped-impedance shunt stub (S-SISS). The SCRLH resonator is studied and employed to introduce two notched-bands. An S-DGS and an S-SISS are cascaded to suppress the spurious in the stop-band. Good insertion/return losses and high out-of-band rejections are achieved as demonstrated in both simulation and experiment.
Keywords :
band-pass filters; defected ground structures; electric impedance; notch filters; resonator filters; ultra wideband communication; SCRLH resonator; UWB bandpass filter; compact ultra-wideband bandpass filter; insertion loss; interdigital hairpin resonator unit; notch-bands; out-of-band rejection; return loss; semicircle defected ground structure; semicircle stepped-impedance shunt stub; simplified composite right-left-handed resonator; wide stop-band;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2010.1743
