Active magnetic cloaking with a dipole

We theoretically propose and experimentally demonstrate an active quasi-static magnetic cloak enabled by a single magnetic dipole. The cloaking effect can be achieved by active cancelation of the background magnetic field using the magnetic dipole. Compared with previous multi-unit designs, the single-unit design drastically reduces the number of control units required. It has potential applications in realizing the homogeneous field in wireless power transfer, magnetic resonance imaging, and other diffusion-based applications.