Advanced 3D inductor structures with confined magnetic field

An apparatus comprising:

• a primary three-dimensional (3D) multi-turn inductor, wherein:
• the primary 3D multi-turn inductor has a shape corresponding to a first two-dimensional (2D) lobe and is wrapped around a cube, wherein the first 2D lobe has no internal intersections;
• the primary 3D multi-turn inductor extends over each facet of the cube;
• and
• the primary 3D multi-turn inductor comprises eight connecting ends located at eight edges of the cube, respectively, wherein the primary 3D multi-turn inductor turns directions only at each of the eight connecting ends;
• and
• a secondary 3D multi-turn inductor, wherein:
• the secondary 3D multi-turn inductor has a shape corresponding to a second 2D lobe and is wrapped around the same cube, wherein the second 2D lobe has no internal intersections;
• the secondary 3D multi-turn inductor extends over each facet of the cube;
• the secondary 3D multi-turn inductor comprises another eight connecting ends;
• and
• the primary 3D multi-turn inductor and the secondary 3D multi-turn inductor are wrapped around the cube in a configuration such that the primary 3D multi-turn inductor is parallel to the secondary 3D multi-turn inductor on each facet of the cube, respectively.