An apparatus for use with a power generator includes a first power splitter having an input port, wherein the input port is configured to connect to a power generator, a second power splitter having an output port, wherein the output port is configured to connect to a device that receives power from the power generator, and a first phase shifter assembly coupled to the first power splitter and the second power splitter, wherein the first phase shifter assembly is a non-reciprocal phase shifter. An apparatus for use with a power generator includes a power attenuator having an input for receiving power from a power generator, and a phase shifter, wherein the phase shifter includes a ferrite material and circuitry for electro-magnetically biasing the ferrite material.