Patent ID: 8626090
Filing Date: 2014-01-07
Classification: H03F,H04B,Y10T

Abstract:
1. An interference reducing circuit for a radio frequency transmitter, wherein the radio frequency transmitter comprises: an amplifier; an antenna port; an isolator configured to isolate an output of the amplifier from an interfering signal of the antenna port; a transmission line comprising a first part, a second part and a third part, the first part comprising a first end connectable to a signal source and a second end coupled to an input of the amplifier, the second part comprising a third end coupled to the output of the amplifier and a fourth end coupled to an input of the isolator, the third part comprising a fifth end coupled to an output of the isolator and a sixth end coupled to the antenna port; and a linearization loop configured to reduce a non-linearity of the isolator, the linearization loop comprising: wherein the interference reducing circuit is configured to reduce an influence of the interfering signal of the antenna port on the linearization loop and comprises: