Journal
JOURNAL OF APPLIED PHYSICS
Volume 104, Issue 10, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3013905
Keywords
leaky wave antennas; metamaterials; spatiotemporal phenomena
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Funding
- Spanish Ministry of Education and Science [FPU-AP2006-015]
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A spatial-temporal Talbot phenomenon, based on metamaterial composite right/left-handed (CRLH) leaky-wave antennas (LWAs), is presented. This phenomenon, reported 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. The phenomenon is analyzed theoretically and validated numerically for the case of narrow-band pulses.
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