US 11,990,689 B2
Antenna system for wearable devices
Sung Hoon Oh, San Jose, CA (US); Yonghua Wei, San Diego, CA (US); Md Rashidul Islam, Fremont, CA (US); Qian Qiao, San Jose, CA (US); Ulf Jan-Ove Mattsson, Campbell, CA (US); Geng Ye, Union City, CA (US); and Bruno Cendon Martin, Palo Alto, CA (US)
Assigned to Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed by META PLATFORMS TECHNOLOGIES, LLC, Menlo Park, CA (US)
Filed on Dec. 14, 2021, as Appl. No. 17/550,963.
Claims priority of provisional application 63/208,142, filed on Jun. 8, 2021.
Prior Publication US 2022/0393352 A1, Dec. 8, 2022
Int. Cl. H01Q 5/35 (2015.01); H01Q 1/27 (2006.01); H01Q 5/45 (2015.01)
CPC H01Q 5/35 (2015.01) [H01Q 1/273 (2013.01); H01Q 5/45 (2015.01)] 20 Claims
OG exemplary drawing
 
1. A system comprising:
an enclosure comprising a conductive material that is configured to house one or more internal electrical components disposed on a printed circuit board (PCB);
a first antenna feed that is electrically connected to the PCB and to the enclosure, and is further electrically connected to a radiating coupling arm configured for wireless communication in at least a first wireless communication band;
a second antenna feed that is electrically connected to the PCB, and is further electrically connected to an antenna configured for wireless communication in a second, different wireless communication band;
a first grounding leg that forms an electrical ground between the PCB and the enclosure; and
a second, switchable grounding leg positioned at least a minimum specified distance away from the first grounding leg, the second, switchable grounding leg providing a controllable electrical ground between the PCB and the enclosure,
wherein the second, switchable grounding leg is switched on when the enclosure is coupled to a cradle and is switched off when the enclosure is uncoupled from the cradle.