US 12,170,538 B2
Radio frequency architecture for reducing mutual interference between multiple wireless communication modalities
Antonio Faraone, Fort Lauderdale, FL (US); and Giorgi Bit-Babik, Plantation, FL (US)
Assigned to MOTOROLA SOLUTIONS, INC., Chicago, IL (US)
Filed by MOTOROLA SOLUTIONS, INC., Chicago, IL (US)
Filed on Jun. 30, 2020, as Appl. No. 16/917,452.
Prior Publication US 2021/0409064 A1, Dec. 30, 2021
Int. Cl. H04B 1/48 (2006.01); H01Q 1/24 (2006.01); H04B 1/04 (2006.01); H04B 1/525 (2015.01)
CPC H04B 1/525 (2013.01) [H01Q 1/243 (2013.01); H04B 1/0458 (2013.01); H04B 1/48 (2013.01)] 16 Claims
OG exemplary drawing
 
8. A portable communications device comprising:
a housing;
a radio-frequency (RF) antenna system including a first RF antenna, a second RF antenna, and a third RF antenna supported by the housing;
an RF transceiver system including a first RF transceiver, a second RF transceiver, and a third RF transceiver operating in respective RF bands; and
an isolator circuit coupled to the RF antenna system and the RF transceiver system and configured to provide RF isolation between the first RF transceiver, the second RF transceiver, and the third RF transceiver, the isolator circuit including
a first RF coupler realized using coupled RF transmission lines and featuring six RF coupler ports coupled to the first RF antenna, the second RF antenna, the third RF antenna, the first RF transceiver, the second RF transceiver, and the third RF transceiver through respective phasor shaping networks;
a second RF coupler coupled between (i) the first RF coupler and (ii) the first RF antenna and at least one selected from the group consisting of: the second RF transceiver and the third RF transceiver; and
a third RF coupler coupled between (i) the first RF coupler and (ii) the first RF transceiver and at least one selected from the group consisting of: the second RF antenna and the third RF antenna.