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Direct observation of negative phase velocity and positive group velocity in time domain for composite right/left-handed transmission lines
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10.1063/1.2372573
/content/aip/journal/jap/100/11/10.1063/1.2372573
http://aip.metastore.ingenta.com/content/aip/journal/jap/100/11/10.1063/1.2372573

Figures

Image of FIG. 1.
FIG. 1.

Circuit model for the unit of the CRLH TL. and are loaded capacitors and inductors, respectively. The rectangles denote interconnecting transmission lines. is the characteristic impendence of the microstrip sections.

Image of FIG. 2.
FIG. 2.

Photograph of the CRLH TL. Loaded elements are and . The length of the unit cell is .

Image of FIG. 3.
FIG. 3.

Schematic diagram of the experimental setup for measuring the CRLH TL in the time domain.

Image of FIG. 4.
FIG. 4.

Time-domain experimental results. , , , and mean wave forms at the input port, the second unit, the forth unit, and the sixth unit, respectively. The cross marks show the negative phase propagation, and the envelope peaks show the positive group delay.

Image of FIG. 5.
FIG. 5.

Time-domain experimental results for conventional transmission line showing parallel phase velocity and group velocity. The cross marks and the envelope of the wave forms at , , , and demonstrate that the phase velocity and group velocity are parallel.

Image of FIG. 6.
FIG. 6.

Time-domain simulation results with cross marks. , , , and mean wave forms at the input port, the second unit, the forth unit, and the sixth unit. The cross marks show the negative phase propagation, and the envelope shows the positive group delay.

Image of FIG. 7.
FIG. 7.

Dispersion relations of the CRLH TL obtained by a frequency-domain method and theoretical values.

Tables

Generic image for table
Table I.

All results for the phase and group velocity.

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/content/aip/journal/jap/100/11/10.1063/1.2372573
2006-12-01
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Direct observation of negative phase velocity and positive group velocity in time domain for composite right/left-handed transmission lines
http://aip.metastore.ingenta.com/content/aip/journal/jap/100/11/10.1063/1.2372573
10.1063/1.2372573
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