Efficient time-domain analysis of highly dispersive linear and non-linear metamaterial waveguide and antenna structures operated in the impulse-regime
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Research GroupGrupo de Electromagnetismo Aplicado a las Telecomunicaciones (GEAT)
Knowledge AreaTeoría de la Señal y las Comunicaciones
SponsorsThis work was partially supported by the Spanish Ministry of Education and Science under Grant FPU-AP2006-015 and with the Project TEC2007-67630-C03-02.
PublisherInstitution of Engineering and Technology (IET)
Bibliographic CitationGÓMEZ DÍAZ, J.S., GUPTA, S., ÁLVAREZ MELCÓN, A., CALOZ, C. Efficient time-domain analysis of highly dispersive linear and non-linear metamaterial waveguide and antenna structures operated in the impulse-regime. IET Microwaves, Antennas & Propagation, 4 (10): 1617 - 1625 , Octubre 2010. ISSN 1751-8725
KeywordsAntena de fuga de ondas
Dominio del tiempo de análisis
Guías de onda
Estructuras de antena
Leaky wave antenna (LWA)
In this paper, a numerical method has been proposed for the analysis of highlydispersive linear and non-linear metamaterial structures. Initially, pulse propagation along non-linear composite right/left-handed transmission line (CRLH TL) has been carefully studied. For this purpose, a dispersive CRLH line has been loaded with hyper abrupt diodes to achieve non-linearity. The characteristic impedance and propagation constant of each unit cell of the CRLH TL is then varied at each time-step, and the nonuniform line is analyzed. A novel interpolation scheme, based on the smooth behaviour of the propagation constant with small variations of the shunt capacitor has been proposed. This scheme has provided an 80% reduction of the computational cost maintaining high accuracy. A general example which combines dispersion and nonlinearity has finally been presented, validated and discussed. Secondly, the impulseregime radiation of a leaky-wave antenna has been analyzed and employed to ...
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