Hybrid transformer based integrated duplexer for multi-band/multi-mode radio frequency (RF) front end

摘要

An integrated duplexer based on electrical balance is described. The duplexer module includes a hybrid transformer. The hybrid transformer includes a primary coil and a secondary coil. The primary coil is coupled between an output of a power amplifier and an antenna. The secondary coil is coupled between an input of a low noise amplifier and ground. The duplexer also includes a balancing impedance that is coupled between the primary coil and the secondary coil.

主权项

1. A duplexer, comprising:
a hybrid transformer comprising:
a primary coil coupled between an output of a power amplifier and an antenna; anda secondary coil coupled between an input of a low noise amplifier and ground; and a balancing impedance, wherein the balancing impedance is coupled between the primary coil and the secondary coil, wherein the secondary coil is coupled between the balancing impedance and the ground.