Super-resolution property in near and far field based on time reversal

Compact antenna arrays are appealing due to sub-wavelength inter-element spacing and independent channels. For building multi-independent channels in the limited space of a mobile station, it is of great significance to study the time reversal (TR) technique, which was shown to achieve super-resolution focusing property to be applied for the design of compact antenna arrays (G. Lerosey et al., Science, 315, 2007, pp. 1120–1122).