I. Hybrid/MMIC RF Power Amplifier Design, Characterization, and Modeling: Innovative power amplifiers (PAs) and PA architectures are designed, characterized, and modeled. Particular emphasis is sought to achieve high energy efficiency. Doherty and Envelope-tracking (ET) PA architectures are also investigated. The goal of this research area is to advance the linearity, efficiency, and bandwidth of existing solutions.
II. Digital Pre-Distortion (DPD) Algorithms and DSP/FPGA Implementation: Wideband digital pre-distortion (DPD) implementations are developed to extend the bandwidth and linearity while minimizing the power requirements. To this aim, DSP and FPGA implementations, also with Xilinx RF System-on-Chips (SoCs), are realized, tested, and verified with real PAs in the loop.
III. Analog RF Solutions for High Linearity and Broadband Transmitters: Analog and RF/microwave circuits are used to improve the linearity and efficiency of power amplifiers. Analog pre-distortion (APD) linearization, mutual coupling cancellation, and 2nd harmonic injection are some of the techniques investigated by the group to improve the PA performance.
