  An ensemble of resonators arranged on a sub-wavelength scale is usually
considered as a bulk effective medium, known as a metamaterial, and can offer
unusual macroscopic properties. Here, we take a different approach and limit
ourselves to the study of only a few number of such elementary components and
demonstrate that it still offers uncommon opportunities. Typically, thanks to
the multiple scattering and the phase shift that the resonances offer, we
observe fields that vary at scales completely independent of the wavelength in
freespace. By smartly tuning the resonance frequencies, we can design at will
the complex current distribution in those resonators. This way, we design a
superdirective antenna, {\it ie.} an antenna that is surprisingly more
directive than its size would foreshadow. This approach is verified numerically
and experimentally in the context of microwaves, but this applies to any
wave-field where sub-wavelength resonators exist.
