Transmission of images with subwavelength resolution to distances of several wavelengths in the microwave range

We report experimental results that demonstrate transmission of a microwave image by means of an array of parallel metallic rods over a distance that is 3.5 times greater than the wavelength. The resolution of such an imaging device is 15 times less than the wavelength. The magnifying, demagnifying, and repeating properties of the lenses formed by the long metallic rods provide a unique solution for subwavelength imaging at the microwave range. The resolution of such lenses is mainly determined by the characteristic period, which is only limited by the fabrication capability rather than by any physical constraints. The lenses can be scaled down to operate at terahertz and midinfrared frequencies.