Abstract
An ultra-wide band high-efficient power amplifier (PA) which employs both series of continuous modes and series of inverse continuous modes is presented for the first time. Consequently, the solutions space of fundamental impedance is expanded greatly. The operation frequency range of this mode can achieve more than two-octave bandwidth. Multistage transmission-line low-pass filter matching network has been utilised for matching fundamental impedance and suppressing of high-order harmonic. To verify this method, a high-efficient PA, which operates across 0.3–2.7 GHz (160% bandwidth) is designed. Simulation and experimental results show that the drain efficiency of this PA achieves 61.4–81.9%, and 8.3–16.6 W output power in the target band.
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