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The paper discusses the bandwidth extension of a second-harmonic tuned GaN Doherty power amplifier: the adopted strategy relies on output wideband compensation stages and input broadband matching. The single-band (3.5 GHz) and the wide-band (3–3.6 GHz) power amplifiers are compared in terms of building blocks design strategy. The performances, experimentally characterized in single- and two-tone conditions,...
We present a wideband GaN MMIC power amplifier, designed to be the unit cell of a balanced module. A wideband output matching network, based on a two-section transformer, is adopted to compensate for reactive effects over the entire bandwidth. A reactive network is inserted at the input for gain equalization at compression; the resulting input reflectance will be controlled by the balanced configuration...
We discuss the design, realization and experimental characterization of a GaN-based hybrid Doherty power amplifier for wideband operation in the 3–3.6-GHz frequency range. The design adopts a novel, simple approach based on wideband compensator networks. Second-harmonic tuning is exploited for the main amplifier at the upper limit of the frequency band, thus improving gain equalization over the amplifier...
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