Feedthrough cancellation in a class E amplified polar transmitter

The purpose of this work is to study feedthrough cancellation methods available for a class E amplified polar transmitter. A mathematical feedthrough cancellation using measured S-parameters is presented. The results show a clear improvement to the nonlinear behaviour of a class E amplifier. Also, a transistor level possibility of feedthrough cancellation is discussed and simulated. With a large-signal S-parameter simulation, a 5 dB feedthrough attenuation was achieved.