Title :
A novel UWB band-pass filter with selectivity improved by modified resonant-type composite right/left-handed structure
Author :
Shuying Lan ; Long Jin ; Linlin Zhou
Author_Institution :
Res. Inst. of Electron. Sci. & Technol., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
A novel Composite Right/Left Handed Transmission Line (CRLH-TL) ultra-wideband band-pass filter (UWBPF) is proposed in this paper. The filter is composed of a complementary split ring resonator (CSRR), a pair of quarter-wave slot resonator circuit (QWSRC) and radial stub (RS). Besides the two transmission zeros introduced by the QWSRC and the RS for better upper stop-band rejection, the CSRR creates another transmission zero to improve lower stop-band selectivity. In addition, detailed analysis based on image parameter method is given. The fractional bandwidth (FBW) is designed to be 100%. The measured results show good rejection of more than 22 dB in the lower stop-band and 32 dB in the upper stop-band from 6.9GHz to 9.6GHz, which are in good agreement with simulated results.
Keywords :
band-pass filters; microwave metamaterials; resonator filters; UWB bandpass filter; bandwidth 6.9 GHz to 9.6 GHz; complementary split ring resonator; composite right left handed transmission line; fractional bandwidth; image parameter method; modified resonant type composite right left handed structure; quarter wave slot resonator circuit; radial stub; transmission zero; Art; Band-pass filters; Indium tin oxide; Magnetics; Metamaterials; CRLH-TL; CSRR; QWSRC; RS; UWBPF;
Conference_Titel :
Microwave and Millimeter Wave Circuits and System Technology (MMWCST), 2013 International Workshop on
Conference_Location :
Chengdu
DOI :
10.1109/MMWCST.2013.6814635
