US 11,658,634 B1
Radio frequency port impedance detection using concurrent radios
Nathan Labadie, Gilroy, CA (US); Kun Ting Tsai, Fremont, CA (US); Cheol Su Kim, San Jose, CA (US); Kalyan Teja Posani, San Jose, CA (US); and Omar Fawazhashim Zakaria, Saratoga, CA (US)
Assigned to Amazon Technologies, Inc., Seattle, WA (US)
Filed by Amazon Technologies, Inc., Seattle, WA (US)
Filed on Aug. 12, 2021, as Appl. No. 17/400,333.
Application 17/400,333 is a continuation of application No. 16/744,974, filed on Jan. 16, 2020, granted, now 11,121,693.
This patent is subject to a terminal disclaimer.
Int. Cl. H04B 17/318 (2015.01); H04W 4/80 (2018.01); H03H 7/40 (2006.01); H04W 52/02 (2009.01); H04W 76/27 (2018.01); H04B 1/18 (2006.01)
CPC H03H 7/40 (2013.01) [H04B 1/18 (2013.01); H04B 17/318 (2015.01); H04W 52/0245 (2013.01); H04W 76/27 (2018.02)] 20 Claims
OG exemplary drawing
 
1. A wireless device comprising:
at least two radios;
at least two radio frequency (RF) ports; and
an impedance detection circuit coupled to the at least two radios, wherein the impedance detection circuit is configured to:
measure a first receive signal strength indicator (RSSI) value of a first reflected signal, the first reflected signal corresponding to a first signal sent by one of the at least two radios;
determine that the first RSSI value exceeds a threshold, the threshold representing an impedance mismatch condition at or beyond at least one of the two RF ports; and
send first data to a second device indicative of the impedance mismatch condition.