A novel wideband digital power amplifier and transmitter architecture for multimode handsets

The paper introduces a novel power amplifier architecture: "the wideband digital power amplifier" (DPA). This device provides RF power amplification, phase/amplitude combining, and wideband amplitude modulation. The DPA is complemented with a digital modulator to realize a compelling digital transmitter (DTx) architecture. The basic functionality and advantages of the DPA and transmitter are presented. In addition, measured results for cdma2000 are provided to demonstrate the performance capabilities of the DPA/DTx.