Over Octave Hybrid Continuous Modes Power Amplifier Design Based on Modified Real Frequency Technique

Abstract

In this paper, a design method for an over octave hybrid continuous mode power amplifier (PA) based on modified real frequency technique (MRFT) is proposed. The extended continuous class-F/F-1 modes greatly expand the design space, which provides the possibility of over octave design, the optimal impedances at internal current-generator (I-Gen) plane and package plane are investigated. Then a novel broadband matching network based on MRFT is presented for impedance match. To verify the proposed methodology, an over octave PA with radial stub is fabricated and measured. The PA achieves a bandwidth of 133% from 0.8 GHz to 4 GHz, over this frequency range, the drain efficiency is 58.3-68.7% and largesignal gain is greater than 9.6 dB.