Bent coil structure for wireless power transfer

An apparatus comprising:

• a coil structure comprising
• a first coil comprising a spiral coil that has been bent to form a three dimensional structure having a first side portion, a center portion, and a second side portion, wherein the first side portion of the first coil forms a first angle with the center portion of the first coil and the second side portion of the first coil forms a second angle with the center portion of the first coil,
• a second coil comprising a spiral coil that has been bent to form a three dimensional structure having a first side portion, a center portion, and a second side portion, wherein the first side portion of the second coil forms a third angle with the center portion of the second coil and the second side portion of the second coil forms a fourth angle with the center portion of the second coil, wherein the first side portion and the second side portion in each of the first coil and the second coil, respectively, are symmetrical about the center portion of each coil, and
• a layer of magnetic material adjacent to the center portion of the first coil and the center portion of the second coil,
• the first coil and the second coil being configured such that when a current flows in a first spatial direction in the first coil a current flows in a second spatial direction different from the first spatial direction in the second coil.