Electronic Devices Having Multi-Band Slot Antennas

An electronic device comprising:

• a conductive housing;
• a slot element for a slot antenna that has edges defined by the conductive housing, wherein the slot has opposing first and second edges and opposing third and fourth edges extending between the first and second edges, the third edge has a length that is approximately equal to one-half of a wavelength of operation associated with a fundamental mode of the slot element, the fundamental mode of the slot element is configured to cover wireless communications in a first frequency band, and a harmonic mode of the slot element is configured to cover wireless communications in a second frequency band that is greater than the first frequency band;
• and
• an antenna tuning component coupled between the third and fourth edges of the slot element at a location that is approximately halfway between the first and second edges of the slot element.

An electronic device, comprising:

• conductive structures;
• a slot element for a slot antenna, wherein the slot element has opposing first and second edges and opposing third and fourth edges extending between the first and second edges;
• an antenna feed for the slot antenna coupled between the third and fourth edges of the slot element;
• and
• a filter circuit coupled between the third and fourth edges of the slot element, wherein the slot element is configured to convey radio-frequency signals in a 1575 MHz satellite navigation frequency band, a 2.4 GHz wireless local area network frequency band, and a 5 GHz wireless local area network frequency band.