Tunable vector recombination amplifier

A tunable vector recombination amplifier comprising:

• an input;
• an output;
• a first amplifier circuit path including a first phase shifter, a first interstage impedance matching network, and a first amplifier connected between the first phase shifter and the first interstage impedance matching network, the first phase shifter being configured to receive an input signal from the input and to apply a first phase shift to produce a first phase-shifted signal, and the first amplifier being configured to receive and amplify the first phase-shifted signal to produce a first amplified signal;
• a second amplifier circuit path including a second phase shifter, a second interstage impedance matching network, and a second amplifier connected between the second phase shifter and the second interstage impedance matching network, the second phase shifter being configured to receive the input signal from the input and to apply a second phase shift, different from the first phase shift, to produce a second phase-shifted signal, and the second amplifier being configured to receive and amplify the second phase-shifted signal to produce a second amplified signal;
• a first controllable DC voltage source coupled to the first amplifier and configured to provide a first supply voltage to the first amplifier;
• a second controllable DC voltage source coupled to the second amplifier and configured to provide a second supply voltage to the second amplifier, values of the first and second supply voltages being independently controllable;
• and
• an output amplifier stage coupled to the first and second amplifier circuit paths and to the output and configured to receive, amplify, and vectorially combine the first and second amplified signals to produce a combined output signal having a specified phase and amplitude at the output, the specified phase being determined by the first and second phase shifts and the values of the first and second supply voltages.