US 12,308,815 B2
Differential double balanced duplexer
Christof Pfannenmüller, Erlangen (DE); Joonhoi Hur, Sunnyvale, CA (US); Dominic Koehler, Viereth-Trunstadt (DE); Harald Pretl, Schwertberg (AT); and Rastislav Vazny, Sunnyvale, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Sep. 15, 2022, as Appl. No. 17/945,826.
Prior Publication US 2024/0097639 A1, Mar. 21, 2024
Int. Cl. H01Q 5/30 (2015.01); H03H 7/42 (2006.01); H03H 7/46 (2006.01); H04B 1/00 (2006.01)
CPC H03H 7/425 (2013.01) [H03H 7/463 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A communication device, comprising:
one or more antennas;
communication circuitry; and
isolation circuitry coupling the one or more antennas to the communication circuitry, the isolation circuitry comprising,
a first balun comprising a first portion and a second portion, the first portion coupled to the one or more antennas,
a first impedance tuner coupled to the communication circuitry and to the second portion,
a second balun comprising a third portion and a fourth portion, the third portion coupled to the one or more antennas, and
a second impedance tuner coupled to a second communication circuitry and to the fourth portion.