Figure 1

Schematic and assembled resonator. (a) A schematic of the metamaterial resonator with two rows of 14 wires embedded in a high dielectric constant medium, deionised (DI) water23,24. (b) The resonator with the switching circuit is placed inside an acrylic box (440 mm × 180 mm × 50 mm). The box is filled with DI water to reduce the effective wavelength and operate as a Fabry Perot resonator at 64 MHz. The switching elements are contained in a watertight casing connected to the wires. The rest of the digital circuit and a pickup inductor for generating the switching signal (clock) is housed inside a case on the outside.