Patent ID: 11862838
Assignee: APPLE INC.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An electronic device comprising:
a dielectric substrate having a surface;
an antenna ground on the surface;
a first antenna arm on the surface and coupled to the antenna ground at a grounding location;
a second antenna arm on the surface and extending from the first antenna arm;
an antenna feed coupled to the antenna ground and configured to feed the first and second antenna arms, wherein:
the first antenna arm and a portion of the antenna ground extending between the grounding location and the antenna feed form a loop path that is configured to convey radio-frequency signals in a first frequency band,
the second antenna arm is configured to convey radio-frequency signals in a second frequency band, and
a portion of the first antenna arm forms a return path to the antenna ground for the second antenna arm;

a gap between the second antenna arm and the portion of the first antenna arm, wherein the gap forms a distributed capacitance that is configured to tune a frequency response of the first antenna arm in the first frequency band; and
a dielectric cover layer having a curved interior surface, wherein the first and second antenna arms are configured to radiate through the dielectric cover layer, the surface comprises a curved surface, the first and second antenna arms are disposed between the curved surface of the dielectric substrate and the curved interior surface of the dielectric cover layer, and the curved surface is separated from the curved interior surface by a uniform distance across a lateral area of the first and second antenna arms.