Efecto Talbot espacio-temporal basado en CRLH LWAs: fundamentos y validación experimental
Author
Gómez Díaz, Juan Sebastián; Gupta, Shulabh; Gómez Tornero, José Luis; García Vigueras, María; Álvarez Melcón , Alejandro; [et al.]Research Group
Grupo de Electromagnetismo Aplicado a las Telecomunicaciones (GEAT)Knowledge Area
Teoría de la Señal y las ComunicacionesSponsors
Este trabajo ha sido cofinanciado por el Ministerio de Educación y Ciencia (Proyecto: TEC2007-67630-C03-02, Beca: FPU-AP2006-015).Publication date
2009-09Publisher
Universidad de Cantabria. Servicio de PublicacionesBibliographic Citation
GÓMEZ DÍAZ, Juan Sebastián et al. Efecto Talbot espacio-temporal basado en CRLH LWAs: fundamentos y validación experimental. En: Simposium Nacional de la Unión Científica Internacional de Radio (24º: 2009: Santander) Unión Científica Internacional de Radio (URSI 2009): actas del XXIV Simposium Nacional celebrado 16-18 septiembre 2009, Santander. Santander: Universidad de Cantabria. Servicio de Publicaciones, 2009. Pp. 4. ISBN 978-84-8102-550-7Keywords
Efecto TalbotPulso radiado
Espacio temporal sintonizable
Arrays
Talbot effect
Microwave
Radiated pulse
Space time tunable
CRLH LWA
Composite antennas right/let-handed (CRLH) leaky-wave (LWA)
Antena CRLH leaky-wave
Microondas
Abstract
A tunable spatio-temporal Talbot imaging phenomenon, based on metamaterial composite right/left-handed (CRLH) leaky-wave antennas (LWAs), is presented. This phenomenon,
reported for the first time in the microwave domain, is based on the combination of the conventional spatial monochromatic
Talbot effect and the transient (polychromatic) character of the pulse radiation phenomenon in the LWA structure. When the elements of a periodic CRLH LWA array are fed simultaneously
by an input pulse, the spatial beams corresponding to different temporal frequencies constructively interfere in space so as to form a self-imaged pattern constituted by narrow Talbot
zones. This Talbot effect is spatial-temporal since the Talbot zones are localized both in space and time. Furthermore, the scanning law property of the LWA is exploited to provide an
off-axis radiation, leading to a tunable Talbot distance. This phenomenon is analyzed theoretically, numerically validated and
experimentally demonstrated ...
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