Radio frequency (rf) power amplifier and related signal processing circuitry and methods

A power amplifier for producing an amplified radio frequency (RF) signal from an input RF signal, the power amplifier comprising:

• an RF splitter configured to receive the input RF signal and split the input RF signal into a first split signal and a second split signal;
• a digital control portion comprising:
• digital processing circuitry coupled to the RF splitter, configured to receive a digital representation of the first split signal and to produce a gain control signal and a phase control signal;
• an analog processing portion comprising:
• an RF delay stage coupled to the RF splitter, configured to receive the second split signal and to produce a delayed representation of the second split signal;
• a gain adjustment stage coupled directly or indirectly to the radio frequency delay stage, configured to receive the gain control signal and to adjust a gain based on the gain control signal;
• a phase adjustment stage coupled directly or indirectly to the radio frequency delay stage, configured to receive the phase control signal and to adjust a phase based on the phase control signal, wherein the gain adjustment stage and the phase adjustment stage collectively produce a phase-adjusted and gain-adjusted signal;
• and
• an RF power amplifier stage, configured to receive the phase-adjusted and gain-adjusted signal and to produce the amplified RF signal.