Discussion on coupling mechanism of asymmetric CRLH/RH TL coupler

A quasi 0-dB coupler composed of a composite right-/left-handed transmission line (CRLH TL) and a conventional right-handed transmission line (RH TL) is presented. This coupler is shown to exhibit broad bandwidth and tight coupling characteristics. The circuit model and S-parameter results are also...

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Veröffentlicht in:Journal of Zhejiang University. A. Science 2006, Vol.7 (1), p.95-98
1. Verfasser: 王佑贞 张冶文 赫丽 刘富强 李宏强 陈鸿
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Sprache:eng
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Zusammenfassung:A quasi 0-dB coupler composed of a composite right-/left-handed transmission line (CRLH TL) and a conventional right-handed transmission line (RH TL) is presented. This coupler is shown to exhibit broad bandwidth and tight coupling characteristics. The circuit model and S-parameter results are also demonstrated. Another coupler with properly chosen loaded lumped-elements LL and CL in the CRLH TL is proposed to gain further understanding of the coupling mechanism. By adjusting the spacing between the CRLH TL and RH TL from 8 mm to 0.2 mm, it can be shown that backward coupling occurs in the left-handed region.
ISSN:1673-565X
1009-3095
1862-1775
DOI:10.1631/jzus.2006.A0095