DocumentCode :
1760873
Title :
Folded Substrate Integrated Waveguide Based Composite Right/Left-Handed Transmission Line and Its Application to Partial H -Plane Filters
Author :
Tao Yang ; Pei-Ling Chi ; Ruimin Xu ; Weigan Lin
Author_Institution :
Dept. of Electr. Eng., Univ. of Electron. Sci. & Technol. of China (UESTC), Chengdu, China
Volume :
61
Issue :
2
fYear :
2013
fDate :
Feb. 2013
Firstpage :
789
Lastpage :
799
Abstract :
Composite right/left-handed (CRLH) transmission line structures based on the folded substrate integrated waveguide (FSIW) are presented and discussed in this paper. This FSIW-based CRLH (FSIW-CRLH) transmission line exhibits much lower cut-off frequencies as compared to the ordinary FSIW of the same footprint, and furthermore, it requires only one-half width of the conventional substrate integrated waveguide (SIW) based CRLH (SIW-CRLH) transmission lines while possessing the same dispersion characteristics. In addition, the proposed structure offers the advantage of a high quality factor for preventing the guided-wave circuits from radiation as suffered in the previous open CRLH transmission line structures when operated in the fast-wave region. All of the aforementioned properties lend the proposed FSIW-based CRLH transmission lines best suited to miniaturized and guided-wave microwave applications. In this paper, a comprehensive study on the FSIW-CRLH transmission structures is conducted by means of its dispersion relation and Bloch impedance. In addition, two partial H-plane filters are implemented here to demonstrate the capabilities of miniaturization and high quality factor based on the proposed FSIW-CRLH structures. The resultant filters are shown to have about 80% size reduction as compared to the conventional FSIW filters, and 59% size reduction as compared to the SIW-CRLH filters. To the best of our knowledge, it is the first time that the partial H-plane filters are implemented utilizing both the dispersion behavior of the CRLH transmission structures and the structural benefits of the FSIW configuration.
Keywords :
Q-factor; filters; microwave metamaterials; substrate integrated waveguides; CRLH transmission line structures; FSIW-CRLH transmission line; composite right-left-handed transmission line; cut-off frequencies; dispersion characteristics; folded substrate integrated waveguide; partial H-plane filters; quality factor; Couplings; Dispersion; Equivalent circuits; Power transmission lines; Q factor; Resonant frequency; Substrates; Composite right/left-handed (CRLH) transmission line; folded substrate integrated waveguide (FSIW); partial $H$ -plane filters;
fLanguage :
English
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9480
Type :
jour
DOI :
10.1109/TMTT.2012.2231431
Filename :
6384858
Link To Document :
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