Tunable Talbot imaging distance using an array of beam-steered metamaterial leaky-wave antennas

  • J. S. Gómez-Díaz /
  • A. Lvarez-Melcón /
  • S. Gupta /
  • C. Caloz
Journal ar
Journal of Applied Physics
  • Volumen: 106
  • Número: 8
  • Fecha: 10 November 2009
  • ISSN: 00218979
  • Source Type: Journal
  • DOI: 10.1063/1.3213382
  • Document Type: Article
A tunable spatio-temporal Talbot imaging phenomenon is presented. This phenomenon is based on the radiation properties of an array of beam-steered metamaterial composite right-/left-handed leaky-wave antennas, which is excited by a modulated pulse. The scanning law property of these antennas is exploited to achieve off-axis radiation, which leads to a tunable Talbot distance, as a function of the input pulse modulation frequency. The proposed Talbot phenomenon is analyzed theoretically, taking into account the aberrations produced by higher-order terms present in the free-space transfer function. Numerical simulations confirm the self-imaging and pulse multiplication effects and their tunability capabilities as a function of frequency. Finally, the experimental results are included to confirm the phenomenon predicted. © 2009 American Institute of Physics.

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