US 11,705,935 B2
Antenna interface arrangement
Fabien Mesquita, Limhamn (SE); and Stefan Andersson, Flyinge (SE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 17/799,756
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Mar. 20, 2020, PCT No. PCT/EP2020/057851
§ 371(c)(1), (2) Date Aug. 15, 2022,
PCT Pub. No. WO2021/185459, PCT Pub. Date Sep. 23, 2021.
Prior Publication US 2023/0073267 A1, Mar. 9, 2023
Int. Cl. H04B 1/58 (2006.01); H04B 1/525 (2015.01)
CPC H04B 1/581 (2013.01) [H04B 1/525 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An antenna interface arrangement for cancellation of a transmit signal at a receiver port of a transceiver, the antenna interface arrangement comprising:
a distributed transformer comprising:
a primary side winding connectable to a transmitter port of the transceiver and comprising a first part and a second part;
a first secondary side winding connectable to an antenna port of the transceiver and having a first inductive coupling to the first part of the primary side winding; and
a second secondary side winding connectable to the receiver port of the transceiver and having a second inductive coupling to the second part of the primary side winding, wherein the second inductive coupling is adapted to provide a first version of the transmit signal at the receiver port; and
an amplifier having an input connected to the first secondary side winding and an output connected to the second secondary side winding, wherein the first inductive coupling and the amplifier are adapted to provide a second version of the transmit signal at the receiver port,
wherein the second version of the transmit signal is arranged to cancel the first version of the transmit signal at the receiver port.