Distributed Power Amplifier with electronic harmonic filtering

Providing all band power amplification and harmonic rejection are objectives with orthogonal implementations. This paper is a review of a new distributed power amplifier (DPA) architecture using programmable frequency dispersion. This frequency domain dispersion is designed to achieve electronic harmonic filtering within the intended frequency band. Tunable reactive components are not practical in a high power transmitter network. Instead vector signal combining is used to provide very narrow band destructive harmonic cancellation while the vector signal processing for the fundamental is constructive. This is a novel technology that enables an all band software defined transmitter suitable for portable battery power communications equipment.