Design of Ultra-Wideband Power Amplifiers Based on Resistive-Resistive
Series of Continuous Modes
Abstract
This letter proposes a novel design method for
resistive-resistive series of continuous modes (Res-Res SCMs) power
amplifier (PA), which can extend the bandwidth of the SCMs PAs. Using a
waveform engineering method, by introducing resistive part to the purely
reactive second harmonic load of the series of continuous modes,
overcoming the bandwidth limitation of traditional continuous PAs within
one octave due to the inability to overlap between low band and
high-order harmonics and high band fundamental waves. An ultra-wideband
PA working across 0.4–3.1 GHz (154.3% bandwidth) is simulated and
fabricated using a 10 W GaN HEMT device, the experimental results show
that a drain efficiency of 63%−81.7% can be achieved with a saturated
output power of 38.6−42.3 dBm in the desired design band.
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