US 12,283,739 B2
Duplexer architecture using 90 degree hybrid coupler based balancing conditions
Christof Pfannenmüller, Erlangen (DE); 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. 14, 2022, as Appl. No. 17/932,275.
Prior Publication US 2024/0088538 A1, Mar. 14, 2024
Int. Cl. H01P 5/22 (2006.01); H04B 1/04 (2006.01); H04B 1/16 (2006.01); H04B 1/48 (2006.01)
CPC H01P 5/22 (2013.01) [H04B 1/04 (2013.01); H04B 1/16 (2013.01); H04B 1/48 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A communication device, comprising:
one or more antennas;
a transmit circuit;
a receive circuit;
splitter circuitry coupled to the one or more antennas, the splitter circuitry configured to split a signal received at the one or more antennas into a first portion and a second portion;
at least one phase shifter coupled to the splitter circuitry, the at least one phase shifter configured to shift the first portion of the signal; and
a 90 degree hybrid coupler comprising a plurality of ports, the 90 degree hybrid coupler coupled to
the at least one phase shifter via a first port of the plurality of ports,
the transmit circuit via a second port of the plurality of ports, and
the receive circuit via a third port of the plurality of ports,
the 90 degree hybrid coupler configured to shift the first portion of the signal and constructively combine the first portion of the signal and the second portion of the signal.