An Analytical Matching Approach for Concurrent Tri-Band Power Amplifiers

In this paper, a tri-band complex impedance transformer is proposed and applied to design a concurrent tri-band power amplifier (PA) for 5G FR1 applications. The transmission line parameters of the PA matching network are obtained using the derived analytical design formula, which avoids the time-consuming numerical optimization. As a design example, a tri-band PA is designed to validate the proposed approach. Simulation results verified that the tri-band PA achieves the peak power-added efficiency (PAE) of 72.7%, 69.5%, and 64.7% with the output power of 42.5, 41.8, and 41.5 dBm at 2.6, 3.5, and 4.9GHz, respectively.