Abstract
A dual-band tri-way Doherty power amplifier (PA) with frequency dependent power division is proposed. Compared to the dual-band two-way Doherty PA, the power back-off range of the dual-band tri-way Doherty PA is extended efficiently. Due to frequency dependent power division, the efficiency of the proposed PA is improved at two different frequencies concurrently. The measured results show that power-added efficiencies of 61 and 44% are reached at the 9 dB back-off point from saturation at 0.9 and 2.31 GHz, respectively.
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