Nonlinear Power Splitter: phase response and its potentials to solve the problems for RF/Microwave amplification

The dynamic behaviour of RF power splitters has great impact in the behavior of dual-branch RF power amplifiers (PAs) such as Doherty power amplifiers (DPAs). Recently, we have introduced a structure as a nonlinear power splitter which has the capability to change the power ratio based on the terminal impedances in the output ports. In the previous work, we discussed the amplitude response of this new structure and how we can deliver more power to one branch or vice versa in dual branch configurations. But, for using this structure in the Doherty amplifier, the phase response of this structure is crucial as well In this paper, we analyze the phase response of the standard Hybrid Branch Line Coupler (HBLC) structure and then we show that the phase response of the nonlinear power splitter has some advantages that make it easier to use in the Doherty power amplifier design. Continuing, we show some potential applications of the nonlinear power splitters for RF/Microwave amplifications.