This paper introduces a dual‐frequency wideband inverse Class‐F power amplifier (PA). This PA employs a dual‐frequency biasing circuit to effectively prevent RF signals from entering the DC power supply. We combine the SRFT with the continuous inverse Class‐F PA reactance space to design a wideband matching network. By moderately relaxing the third harmonic constraints in the low‐frequency band to avoid spectrum conflicts, the proposed PA achieves high efficiency and wideband characteristics. After testing, the designed PA has a 57.4%–61.1% drain efficiency and 39.4–40.3 dBm output power in the 0.8–1.0 GHz range and a 58.5%–71.7% drain efficiency and 40.6–41.7 dBm output power in the 3.3–3.8 GHz range.
He et al. (Thu,) studied this question.