A novel design methodology for ultrawideband high‐efficiency hybrid extended continuous inverse class‐F power amplifier

Abstract This paper proposes a design method for designing an ultrawideband and high‐efficiency hybrid extended continuous inverse class‐F power amplifier (PA) based on elliptic low‐pass filtering matching network. This design methodology expands the impedance space by adding free factors to the current equation of traditional inverse class‐F power amplifier (PA). Additionally, an output matching network (OMN) incorporating an elliptical low‐pass filter creates two transmission zeros near the passband and provides a rapid transition to the impedance from passband to stopband. In order to verify the effectiveness and superiority of this design method, an ultrawideband PA working over 0.7–3.7 GHz (136.4%) is designed and fabricated. Over this frequency range, the drain efficiency (DE) is measured as 60.7%–73.4% with the output power of greater than 41 dBm and a large signal gain ranging from 11 to 12.7 dB.