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This contribution presents a groundbreaking distributed matching/combining network that allows to develop ultra-broadband Doherty Power Amplifiers (DPAs). In 73% of fractional bandwidth, from 1.2 GHz to 2.6 GHz, input return loss lower than −18 dB is demonstrated with 1.82 resistance transformation ratio. The active load modulation capability is verified, resulting in a resistance modulation index...
In this paper, a method for measuring wideband waveforms correctly when undersampling is used as a digitizing technique is presented. Two major challenges arise when undersampling wideband waveforms: overlapping of aliased spectral bins of the digitized waveform and ambiguity in spectral bins standing on multiples of the Nyquist frequency. Those challenges are more pronounced when using wideband modulated...
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