US 12,261,581 B2
Tunable matching network
Alfred Erik Raidl, Linz an der Donau (AT); Antonio Passamani, Munich (DE); and Chia-Yu Hsieh, Munich (DE)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Jul. 13, 2022, as Appl. No. 17/864,188.
Prior Publication US 2024/0022226 A1, Jan. 18, 2024
Int. Cl. H03H 7/38 (2006.01); H03H 7/01 (2006.01); H03H 7/09 (2006.01); H03H 7/42 (2006.01); H03M 1/66 (2006.01); H04B 1/04 (2006.01); H04B 1/18 (2006.01); H04B 1/40 (2015.01)
CPC H03H 7/38 (2013.01) [H03M 1/66 (2013.01); H04B 1/40 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electronic device, comprising:
one or more antennas configured to transmit one or more radio frequency (RF) signals; and
a transmitter coupled to the one or more antennas, the transmitter comprising a transformer comprising,
a primary portion configured to receive one or more analog signals indicative of the one or more RF signals, the primary portion having
a first inductor,
a second inductor, and
an impedance tuning circuit coupled in series between the first inductor and the second inductor, the impedance tuning circuit comprising a first auxiliary capacitor configured to increase a transmission frequency range of the transmitter, and
a secondary portion configured to provide the one or more analog signals to one or more downstream components of the electronic device for transmission via the one or more antennas, the secondary portion having a third inductor configured to inductively couple to the first inductor, and a fourth inductor configured to inductively couple to the second inductor.