Telefonaktiebolaget Lm Ericsson (publ)

Fabien Mesquita

Stefan Mikael Andersson

Fredrik Tillman

An antenna interface arrangement is disclosed for cancellation of a transmit signal at a receiver port of a transceiver. The antenna interface arrangement comprises a distributed transformer and an impedance. The distributed transformer has a primary side winding connectable to an antenna port of the transceiver and having a first part () and a second part (), a first secondary side winding () connectable to a transmitter 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. The impedance () is connected between the first secondary side winding and the second secondary side winding. The first and second inductive couplings are adapted to provide a first version of the transmit signal at the receiver port, and the impedance is adapted to provide a second version of the transmit signal at the receiver port, for cancelling the first version of the transmit signal. In some embodiments, the antenna interface arrangement is also for cancellation of a received signal at the transmitter port of the transceiver. Corresponding transceiver and communication device are also disclosed. In some embodiments, the antenna interface arrangement is also for cancellation of a received signal at the transmitter port of the transceiver. Corresponding transceiver and communication device are also disclosed.

Antenna interface arrangement

An antenna interface arrangement is disclosed for cancellation of a transmit signal at a receiver port of a transceiver. The antenna interface arrangement comprises an amplifier and a distributed transformer having a primary side winding, a first secondary side winding, and a second secondary side winding. The primary side winding is connectable to a transmitter port of the transceiver and has a first part () and a second part (), the first secondary side winding () is connectable to an antenna port of the transceiver and has a first inductive coupling to the first part of the primary side winding, and the second secondary side winding () is connectable to the receiver port of the transceiver and has a second inductive coupling to the second part of the primary side winding. The amplifier () has an input connected to the first secondary side winding and an output connected to the second secondary side winding. The second inductive coupling is adapted to provide a first version of the transmit signal at the receiver port, and the first inductive coupling and the amplifier are adapted to provide a second version of the transmit signal at the receiver port, for cancelling the first version of the transmit signal. Corresponding transceiver and communication device are also disclosed.

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Limhamn, Sweden

Fabien Mesquita