A Doherty amplifier for amplifying an input signal to an output signal to be provided to a load, the Doherty amplifier comprising: a main amplifier for receiving a first signal and for amplifying the first signal to generate a first amplified signal; a first peak amplifier for receiving a second signal and for generating a second amplified signal, the first peak amplifier only operating when the second signal has reached a first threshold power, the first and second signal split from the input signal; and output circuitry to combine the first and second amplified signals to generate an output signal having an operating bandwidth, the output circuitry configured for behaving like a branch line coupler and comprising four artificial lines, wherein: a first artificial line, connected in between an output of the main amplifier and a first branch point, is formed by a series second inductor having a first inductance, a parasitic output capacitance of the main amplifier, and a first grounded capacitor; a second artificial line, connected in between an output of the first peak amplifier and a second branch point, is formed by a series first inductor having the first inductance, a parasitic output capacitance of the peak amplifier, and a second grounded capacitor; a third artificial line, connected in between the outputs of the main and first peak amplifiers, is formed by a series fourth inductor having a second inductance, the parasitic output capacitance of the main amplifier, and the parasitic output capacitance of the peak amplifier; a fourth artificial line, connected in between the first and second branch points, is formed by a series third inductor having the second inductance, and the first and second grounded capacitors; wherein the load is connectable to the first branch point. a main amplifier for receiving a first signal and for amplifying the first signal to generate a first amplified signal; a first peak amplifier for receiving a second signal and for generating a second amplified signal, the first peak amplifier only operating when the second signal has reached a first threshold power, the first and second signal split from the input signal; and output circuitry to combine the first and second amplified signals to generate an output signal having an operating bandwidth, the output circuitry configured for behaving like a branch line coupler and comprising four artificial lines, wherein: a first artificial line, connected in between an output of the main amplifier and a first branch point, is formed by a series second inductor having a first inductance, a parasitic output capacitance of the main amplifier, and a first grounded capacitor; a second artificial line, connected in between an output of the first peak amplifier and a second branch point, is formed by a series first inductor having the first inductance, a parasitic output capacitance of the peak amplifier, and a second grounded capacitor; a third artificial line, connected in between the outputs of the main and first peak amplifiers, is formed by a series fourth inductor having a second inductance, the parasitic output capacitance of the main amplifier, and the parasitic output capacitance of the peak amplifier; a fourth artificial line, connected in between the first and second branch points, is formed by a series third inductor having the second inductance, and the first and second grounded capacitors; wherein the load is connectable to the first branch point. a first artificial line, connected in between an output of the main amplifier and a first branch point, is formed by a series second inductor having a first inductance, a parasitic output capacitance of the main amplifier, and a first grounded capacitor; a second artificial line, connected in between an output of the first peak amplifier and a second branch point, is formed by a series first inductor having the first inductance, a parasitic output capacitance of the peak amplifier, and a second grounded capacitor; a third artificial line, connected in between the outputs of the main and first peak amplifiers, is formed by a series fourth inductor having a second inductance, the parasitic output capacitance of the main amplifier, and the parasitic output capacitance of the peak amplifier; a fourth artificial line, connected in between the first and second branch points, is formed by a series third inductor having the second inductance, and the first and second grounded capacitors; wherein the load is connectable to the first branch point.