Realization of a broadband electromagnetic gateway at microwave frequencies

We propose and experimentally demonstrate a broadband illusion device—“electromagnetic gateway” at microwave frequencies. The device is first realized using crossed split-ring resonator and wire unit cells, which can provide the desirable double-negative parameters through fine geometrical designs. Taking into account the complexities in practical realization, we then simplify the original design by using only half of the unit cells. Both simulation and experimental results verify the good abilities of the simplified gateway device in broadband in microwave frequencies.