Design of Broadband High-Efficiency Power Amplifiers Based on the Hybrid Continuous Modes With Phase Shift Parameter

This is the authors' abstract. We don't add key points for this paper.

The hybrid continuous modes are constituted by a continuum of power amplifier (PA) modes between class-J and continuous class-F. In this letter, a phase shift parameter is introduced in the voltage waveform formula of the hybrid continuous modes to generate complex fundamental and harmonic load impedances, leading to a further extension on the operation bandwidth. Based on the proposed theory, a gallium nitride PA is designed and fabricated over the frequency band of 1.2-3.6 GHz. The measured results show a 60%-72% drain efficiency at a saturated power of 40-42.2 dBm. In addition, when driven by a 20-MHz long-term evolution signal with a peak-to-average power ratio of 7.4 dB, the proposed PA obtains an adjacent channel leakage ratio of -35 dBc at an average output power of 35 dBm at 2.3 GHz.