Spatio-Temporal Talbot Phenomenon using Metamaterial Composite Right/Left-Handed Leaky-Wave Antennas

Abstract

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.