Method of operating a system having a substrate configured to facilitate through-metal energy transfer via near field magnetic coupling

A method of operating a system to transmit wireless electrical energy, the method comprising:

• a) providing a system, comprising:
• i) a transmitting antenna comprising at least one transmitting inductor coil;
• ii) a receiving antenna spaced from the transmitting antenna, the receiving antenna comprising at least one receiving inductor coil positioned on a first substrate, the at least one receiving inductor coil having an inner inductor coil diameter;
• iii) a second substrate having a second substrate surface extending to a second substrate perimeter with an end defining a second substrate surface area and having a second substrate thickness oriented about perpendicular to the second substrate surface, wherein the second substrate is positioned adjacent to the at least one receiving inductor coil;
• iv) a cut-out residing within the second substrate surface area, the cut-out having a cut-out perimeter defining a cut-out shape oriented parallel to the second substrate surface, the cut-out extending through the second substrate thickness, wherein the cut-out perimeter is aligned in parallel with the inner inductor coil diameter of the at least one receiving inductor coil;
• and
• v) at least one slit having a slit length extending from a slit proximal end to a slit distal end, a slit width oriented perpendicular to the slit length, and a slit depth extending at least partially within the second substrate thickness, wherein the slit proximal end extends from the cut-out perimeter, the slit distal end extending towards a second substrate edge;
• and
• b) selecting an operating frequency so that an incident magnetic field generated by the transmitting antenna is received by the receiving antenna so that an electrical energy is captured by the receiving antenna.