Transmission, magnification and demagnification of microwave near-field distributions by tapered arrays of wires

The possibility to use tapered arrays of wires as devices capable of transmission, magnification and demagnification of microwave images with subwavelength resolution is discussed. Three fold magnification, three fold demagnification and transmission of an image with lambda=30 resolution over a distance 3.5 times greater than the wavelength is demonstrated experimentally. The device is capable of transmitting images from one planar interface to another one in contrary to the hyperlens geometries operating with spherical or cylindrical interfaces. The proposed geometry suffers from limitation on the transverse size of the device. This limitation can be overcame by embedding a dielectric phase compensator inside of the array. The experiment confirms reliable performance of the proposed solution.