Title :
Improved composite right/left handed transmission line metamaterials and its application in bandpass filters
Author :
Wen, Haitao ; Jin, Long ; Chen, Haibo
Author_Institution :
Res. Inst. Electron. Sci. & Technol. of UESTC, Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
The composite right/left-handed (CRLH) transmission line (TL) is presented as a general metamaterials unit possessing both left-handed (LH) and right-handed (RH) natures. An improved unit cell of composite right/left handed transmission line is proposed. The electrical equivalent circuit of the unit is discussed. In addition, the cell has a better selectivity and out-of-band rejection, which is very distinguished from the conventional CRLH TL cell. And the parameters of the cell are discussed specifically. After properly designed the parameters, a compact narrow bandpass filter is generated. It has a transmission zero at the lower stop band, and is found that the filter enables the remarkable size reduction from the conventional CRLH TL filters.
Keywords :
band-pass filters; band-stop filters; equivalent circuits; metamaterials; microwave filters; transmission lines; CRLH TL cell; LH natures; RH natures; bandpass filters; cell parameters; compact narrow bandpass filter; composite right/left handed transmission line metamaterials; conventional CRLH TL filters; electrical equivalent circuit; general metamaterials unit; left-handed natures; lower stop band; out-of-band rejection; right-handed natures; size reduction; transmission zero; Band pass filters; Couplings; Equivalent circuits; Filtering theory; Metamaterials; Microwave filters; Power transmission lines; Bandpass filter; Composite right/left handed transmission lines (CRLH); Metamaterials; Transmission zero;
Conference_Titel :
Microwave and Millimeter Wave Circuits and System Technology (MMWCST), 2012 International Workshop on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4673-1893-8
DOI :
10.1109/MMWCST.2012.6238185
