Smartphone with wireless power charing antenna

A smartphone comprising:

• an antenna substrate having a first major surface and a second major surface facing away from the first major surface;
• a first antenna pattern formed on the first major surface and comprising an inner coil and an outer coil surrounding the inner coil;
• a second antenna pattern formed on the second major surface and comprising an inner antenna pattern, an outer antenna pattern, and a third antenna pattern;
• the inner antenna pattern comprising a plurality of curved lines, which defines a central area and a radially-extending inner gap into which the plurality of curved lines of the inner antenna pattern does not extend, wherein at least part of the curved lines of the inner antenna pattern overlaps the inner coil formed on the first major surface and is electrically connected to the inner coil through vias;
• the outer antenna pattern comprising a plurality of curved lines and defining a radially-extending outer gap into which the plurality of curved lines of the outer antenna pattern does not extend, wherein at least part of the curved lines of the outer antenna pattern overlaps the outer coil formed on the first major surface and is electrically connected to the outer coil through vias;
• and
• the third antenna pattern comprising a coil located in the central area and electrically connected to an extension line formed on the second major surface and extending through both the radially-extending inner gap and the radially-extending outer gap,
• wherein the inner coil and the outer coil are electrically connected in parallel to provide a wireless power charging antenna.