A radio frequency amplifying circuit

An amplifier for RF signals having a certain frequency circuit and thus a certain wavelength, said circuit comprising at least: a first hybrid coupler (66; 72) having does an input port to which they may apply radio frequency signals, an isolated port, a first output port and does a second output port, and which is arranged to divide an applied input port into a first signal component to the first output port signal and a second component signal for the second output port, a first amplifier (62, 63) having an input port and an output port, said input port to the first outlet port of the first coupler being connected hybrid (66; 72), a second amplifier (64, 65) having an input port and an output port, said input port to the second output port of the first hybrid coupler (66; 72) being connected, and a hybrid segundoacoplador (67; 73) having: A first input port connected to the output port of the first amplifier (62, 63), was a second input port connected to the output port of the second amplifier (64, 65), an isolated port and an output port that can be connected to a load impedance output and is arranged to combine signals applied to the first input port and the second input port connected to the output port, providing such hybrid couplers first and second and said first and second amplifiers first and second path for radio frequency signals from the input port of the first hybrid coupler (66; 72) to the output port of the second hybrid coupler (67; 73), said first path first amplifier (62, 63) and said second path comprising the second amplifier (64, 65), and wherein the total electrical lengths of the two paths are substantially identical, and the electrical length from the input port of the first hybrid coupler to each of the input ports of the first and second amplifiers differs by a quarter of a wavelength for said radio frequency signals, characterized in that said hybrid couplers (66, 67; 72, 73) are implemented as differential couplers arranged to couple differential radio frequency signals, and in that said amplifiers (62, 63; 64, 65) are differential amplifiers.