Electronic device antenna with embedded parasitic arm

An electronic device having first and second faces, comprising:

• a display having pixel circuitry and a display cover layer, wherein the display cover layer forms the first face of the electronic device;
• a housing having a planar rear wall that forms at least part of the second face of the electronic device and having a curved conductive sidewall that extends between the planar rear wall and the display cover layer;
• an antenna having a resonating element arm formed from the curved conductive sidewall and an antenna ground that is separated from the curved conductive sidewall by a slot running along an edge of the housing;
• and
• dielectric in the slot, wherein the dielectric has a curved surface that extends from a surface of the curved conductive sidewall to a surface of the planar rear wall, the curved surface being curved continuously from the surface of the curved conductive sidewall to the surface of the planar rear wall.

An electronic device comprising:

• a display having pixel circuitry and a display cover layer;
• a housing having a rear wall that opposes the display cover layer and a peripheral conductive sidewall that extends between the rear wall and the display cover layer, wherein the rear wall forms a first exterior surface of the electronic device and the peripheral conductive sidewall forms a second exterior surface of the electronic device;
• an antenna having a resonating element arm formed from the peripheral conductive sidewall and an antenna ground that is separated from the peripheral conductive sidewall by a slot that runs along an edge of the housing;
• and
• dielectric filler in the slot, wherein the dielectric filler has a curved surface that lies flush with the first and second exterior surfaces of the electronic device, the curved surface of the dielectric filler forms a third exterior surface of the electronic device, the electronic device has an interior, the dielectric filler has first and second surfaces that are different from the third exterior surface and that each extend from the third exterior surface towards the interior, the peripheral conductive sidewall has a third surface that is different from the second exterior surface and that extends from the second exterior surface towards the interior, the rear wall has a fourth surface that is different from the first exterior surface and that extends from the first exterior surface towards the interior, the first surface of the dielectric filler directly contacts the third surface of the peripheral conductive sidewall, the second surface of the dielectric filler directly contacts the fourth surface of the rear wall, and the second exterior surface of the peripheral conductive sidewall is at least partially curved.