Doherty Amplifier

A Doherty amplifier, comprising:

• a main amplifier;
• a peak amplifier;
• a Doherty splitter configured for:
• splitting an input signal into a main signal part and a peak signal part;
• and
• providing the main signal part and the peak signal part to the main amplifier and the peak amplifier, respectively;
• a Doherty combiner having a first input port, a second input port, and an output port;
• a non-impedance-inverting connection between an output of the main amplifier and the first input port;
• and
• a first impedance inverting network arranged in between an output of the peak amplifier and the second input port,
• wherein the Doherty splitter, the non-impedance-inverting connection, and the first impedance inverting network are configured such that a signal at the first input port of the Doherty combiner and a signal at the second input port of the Doherty combiner have opposite phases,
• wherein the Doherty combiner comprises:
• a second impedance inverting network in between the first input port and the output port;
• and
• a third impedance inverting network in between the second input port and the output port, and
• wherein the Doherty combiner is configured to add the signal amplified by the main amplifier and the signal amplified by the first amplifier in-phase at the output port.