Figure 9
From: Molding acoustic, electromagnetic and water waves with a single cloak
Experimental results for microwaves at two representative frequencies within the cloaking interval [2.6,6]GHz.
The normalized modulus (upper panel) and the normalized real part (middle panel) of the magnetic field is measured for the source at 3 and 5.475 GHz. One notes that the magnetic field intensity is reduced by 17 dB and 30 dB at the center of the cloak with a reduction varying in the range [12.5,24]dB and[11,38]dB inside the inner disc, respectively at 3.5 and 5.475 GHz. The field is enhanced inside the corona at 3 GHz and both wavefront and field amplitude is better reconstructed behind the cloak at 5.475 GHz. Notably the measured intensity is −14 dB and −12 dB at the left side, respectively at 3 and 5.475 GHz and −1 dB at the right side, of the intensity panels. Protection is clearly more pronounced at 5.475 GHz than 3 GHz.
