Experimental verification of broadband invisibility using a cloak based on inductor-capacitor networks

Abstract

We demonstrate the experimental realization of an invisibility cloak based on inductor-capacitor (L-C) transmission line (TL) networks. The anisotropic medium parameters of a cloak in the cylindrical basis are controlled independently by three branches of the L-C unit cell, which leads to a full-parameter realization of the cloak. A cylindrical cloak working in very-high-frequency band has been designed and fabricated, with its performance measured. The nonresonant property of the TL structure results in a relatively broad bandwidth (from 24 to 40 MHz) of the realized cloak, which is clearly observed in our experiment.