Emergent Reconfigurable DPAs and Beamforming Transmitters for 5G

In this talk we focus on the switched capacitor PA (SCPA) and its use as a digital transmitter with embedded output power stage. We include architectural innovations that allow for improved performance by leveraging the SCPA as a narrowband circuit with a tunable output match that allows wideband operation. Additionally we discuss direct digital beamforming synthesis using a multiphase interpolation approach that leverages the SCPA acting as a bandpass transmitter to realize a compact, fully digital-input beamformer.