Multi-band antenna architectures for a wearable device and related devices and methods

A system, comprising:

• a watch body;
• a conductive watch cradle shaped and configured to support the watch body;
• a coupling mechanism configured to detachably couple the watch body to the conductive watch cradle;
• a ground plane disposed in the watch body;
• and
• at least one electrical contact that extends through a lower portion of the watch body, wherein the at least one electrical contact creates an electrical connection between the ground plane and the conductive watch cradle when the watch body is coupled to the conductive watch cradle, wherein:
• the watch body comprises a conductive portion including an inward protrusion having at least two opposite sides;
• the ground plane comprises a channel;
• the inward protrusion extends into the channel of the ground plane such that the at least two opposite sides of the inward protrusion are placed adjacent to corresponding sides of the channel of the ground plane;
• and
• a gap defined between the conductive portion of the watch body and the ground plane forms a slot antenna that is configured to radiate electromagnetic signals.

A system, comprising:

• a watch body comprising an outer conductive ring and housing a ground plane that is electrically coupled to the outer conductive ring;
• a conductive watch cradle shaped and configured to support the watch body;
• and
• a coupling mechanism configured to detachably couple the watch body to the conductive watch cradle, wherein:
• the outer conductive ring is capacitively coupled to the conductive watch cradle when the watch body is coupled to the conductive watch cradle;
• the outer conductive ring comprises an inward protrusion having at least two opposite sides;
• the ground plane comprises a channel;
• the inward protrusion extends into the channel of the ground plane such that the at least two opposite sides of the inward protrusion are placed adjacent to corresponding sides of the channel of the ground plane;
• and
• a gap defined between the outer conductive ring of the watch body and the ground plane forms a slot antenna that is configured to radiate electromagnetic signals.