Time Reversal in Subwavelength-Scaled Resonant Media: Beating the Diffraction Limit
Figure 3
(a) Picture of the experimental setup. The experiment is realized in a 1 m3 homemade reverberant chamber. The TRM consists of 8 commercial antennas spaced, while the field is measured at the TR focal spot using an array of 8 monopoles on a ground plane spaced. (b) Typical focal spot obtained using TR (Blue experimental, Red Analytical taking coupling into account). The focal spot in an homogeneous medium is diffraction limited to , which reduces here to 0.4 λ due to the coupling between the monopoles.
