Abstract
In this paper, a single-ended parallel-circuit (PC) class-E/F power amplifier (PA) is proposed. For a particular case of the PC class-E/F3 mode with 50% duty cycle, its analytical derivation of the idealized waveforms, optimum values of the load network components, and significant figure-of-merit of PA is elaborated and verified. The ideal optimum voltage and current waveforms do not overlap simultaneously, which presents a theoretical drain efficiency of 100%. In addition, compared with other switch-mode PAs, the proposed structure successfully improves the performance in the peak drain voltage ( $V_{\mathrm {max}}$ ), maximum operating frequency ( $f_{\mathrm {max}}$ ), and power output capability ( $c_{p}$ ). Hence, it provides a good choice for high-efficiency mobile/wireless communication systems in the future. The analysis is validated by simulation and design of a test board. The measurement result shows the output power of 40.4 dBm, drain efficiency of 83.9%, power-added efficiency of 77.2%, and power gain of 10.4 dB at an operating frequency of 2.6 GHz.
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