Patent ID: 8508296
Filing Date: 2013-08-13
Classification: H03F

Abstract:
1. A quadrature power amplifier (PA) comprising: a first amplifier having a first input and a first output; a second amplifier having a second input and a second output; a signal splitter configured for splitting an input signal received by the signal splitter into first and second output signals that are offset by 90 degrees from one another, said first output signal being provided to the first input of the first amplifier and said second output signal being provided to the second input of the second amplifier; a signal combiner having first, second and third ports, said signal combiner configured for combining first and second input signals received at the first and second ports of the signal combiner that are offset by 90 degrees from one another into an inphase signal at the third port of the signal combiner, said first and second ports of the signal combiner being connected to the first output of the first amplifier and the second output of the second amplifier, respectively; and an impedance transformation network connected to the third port of the signal combiner.