Interest in wireless devices has increased demand for smaller gadgets and electronics, along with higher security communication and more efficient power transfer. Far electric fields are susceptible to stray signal interference and malicious remote read. Furthermore, the required antennae length limits miniaturization. Magnetic induction offers the promise of higher security due its field strength decaying with cubic distance. This is advantageous for applications such as wireless pay or medical device authentication. High-density coil inductors closely spaced and aligned can also provide efficient wireless power transfer.