N way doherty amplifier

A device including a Doherty amplifier, the Doherty amplifier comprising:

• an amplifier input and an amplifier output
• at least one main amplifier coupled to the amplifier input via a main input impedance and further coupled to the amplifier output via a main output impedance;
• a plurality of additional amplifiers, each said amplifier being coupled to the input via respective additional input impedances,
• each additional amplifier comprising a respective additional amplifier output coupled to a respective pair of additional impedances connected in series and having a respective connection node between them,
• a first additional amplifier having their respective additional impedances coupled between its respective output and the amplifier output,
• the pair of additional impedances having a first impedance and a second impedance, the first impedance being connected to the respective additional amplifier output and to the connection node, the second impedance being coupled between their respective connection node and the connection node of the previous additional amplifier.