Abstract
AbstractThis paper proposes a novel Class‐F broadband power amplifier design method. A Class‐F power amplifier for 1.3–2.5 GHz is fabricated by step‐matching, combining a harmonic control structure and a parasitic compensation circuit. A bandwidth expansion structure is established based on microstrip lines and capacitor. The proposed structure resolves the low efficiency caused by the coincidence of the fundamental frequency band and second harmonic frequency band, which allows the power amplifier to function properly from 1.1 to 2.5 GHz. A high‐efficiency broadband power amplifier is tested to find that the saturated output power with the proposed device is between 40.1 and 41.7 dBm, the gain is from 9.3 to 14.4 dB, and the drain efficiency is 60.8%–84.2% at 1.1–2.5 GHz frequency.
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