Verification of two linearization methods, applied on asymmetrical two-way microstrip Doherty amplifier in experiment and symmetrical simulation, is performed this paper. The laboratory set-ups are formed to generate the baseband nonlinear signals second-order. After being tuned magnitude phase digital domain modulate second harmonics fundamental carrier. In first method, adequately processed t...

This paper proposes a broadband asymmetrical monolithic microwave integrated circuit (MMIC) Doherty power amplifier (DPA) using 0.25-μm gallium-nitride process with compact chip size of 2.37 × 1.86 mm2 for 5G communication. It adopts an unequal Wilkinson’s divider ratio 2.5:1, where 71.5% the total is transferred to main higher gain. Different input matching networks are used offset phase diffe...

This paper presents a spatial-temporal single harmonic switching (STHS) transmitter array architecture with enhanced efficiency in the power back-off (PBO) region. STHS is an electromagnetic and circuit co-designed jointly optimized that realizes beamforming generation at same time. The temporal dimension originally added to achieve enhancement, which can be combined conventional enhancement me...