Experimental demonstration of subwavelength field channeling at microwave frequencies using a capacitively loaded wire medium

Abstract

In this Brief Report we experimentally demonstrate a possibility to channel the near field distribution of a line source with sub-wavelength details through a layer of an electromagnetic crystal. Channeled intensity maximum having radius of $\lambda ∕10$ has been obtained using an electrically dense lattice of capacitively loaded wires. The loading allows us to reduce the lattice period dramatically so that it is only a small fraction of the free-space wavelength. It is shown that losses in the structure only decrease the total amplitude of the channeled intensity distribution, but do not influence the details.