Modified Hybrid Inverse Continuous Modes With a Phase-Shifted Parameter for Designing Broadband Power Amplifier

A modified hybrid inverse continuous modes (HICM) is proposed in this paper for designing broadband power amplifiers (BPAs). The proposed continuous working mode expands the design space of the inverse continuums through adding a phase-shifted parameter into the current waveform formula. As a proof of concept, a 3.3–4.3 GHz BPA is designed, simulated and measured in this paper. The measured saturation power and gain of the fabricated power amplifier are 39.1–41.8 dBm and 8.1–10.4 dB over 3.3–4.3 GHz. Meantime, the saturation drain efficiency of the fabricated BPA is 52%–71% in the interested frequency band. Moreover, the fabricated power amplifier achieves adjacent channel leakage rates of −33.3 and −55.7 dBc at 4.2 GHz before and after digital predistortion, respectively.