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In this paper, we propose an approach to overcome the well-known “diffraction limit” when imaging sources at several wavelengths away. We employ the superdirective antenna's concepts to design a super-oscillatory filter (SOF) based on the properties of Tschebyscheff polynomials. The SOF is applied to the reconstructed image based on the back-propagation algorithm. We demonstrate the capability of...
A near-field antenna-array probe is used to perform subwavelength imaging on objects buried a quarter-wavelength beneath the surface of a dielectric slab. Short passive dipole objects are detected by monitoring the input reflection coefficient of the probe as it is scanned over the dielectric. Experimental measurements are presented that verify the subwavelength imaging behavior. A minimum resolvable...
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