Electronic Device Antennas on Three-Dimensional Surfaces

An electronic device comprising:

• a conductive housing wall;
• a display cover layer mounted to the conductive housing wall, wherein the display cover layer has a first surface and a second surface opposite the first surface;
• a display panel mounted to a central portion of the first surface and configured to emit light through the display cover layer;
• a near-field communications (NFC) coil, wherein the NFC coil includes at least one winding of conductive wire that surrounds a central opening, the display panel being disposed within the central opening;
• and
• a dielectric that adheres the conductive wire to a three-dimensionally curved portion of the first surface.

An electronic device comprising:

• a conductive housing wall;
• a display cover layer mounted to the conductive housing wall, wherein the display cover layer has a first surface and a second surface opposite the first surface;
• a display panel mounted to a central portion of the first surface and configured to emit light through the display cover layer;
• and
• a near-field communications (NFC) coil, wherein
• the NFC coil includes a conductive trace that winds at least once around a central opening,
• the display panel is disposed within the central opening,
• the conductive trace includes a first conductive layer on a three-dimensionally curved portion of the first surface and a second conductive layer on the first conductive layer,
• the first conductive layer has a first conductivity and a first density,
• the second conductive layer has a second conductivity and a second density,
• the second conductivity is greater than the first conductivity, and
• the second density is greater than the first density.