A 400 W Symmetric Doherty Power Amplifier Covering $1.8-2.7 \text{GHz}$

This paper presents the design of a high power and wideband Doherty Power Amplifier (DPA). Achieving both high power and wide bandwidth in DPAs is challenging due to the inherent bandwidth limitations of the architecture. To address this, a bare-die approach has been used, minimizing parasitics and enhancing overall performance. The proposed technique is demonstrated through the design and implementation of a wideband DPA operating across <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$1.8-2.7 \text{GHz}$</tex>. The prototype achieves a peak output power of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$56 \pm 0.8 \mathbf{d B m}$</tex>, with drain efficiency of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$50-60 \%$</tex> at 6 dB power back-off. Furthermore, linearized modulated measurements, using 20 MHz New Radio (NR) signals with 6 dB peak-to-average power ratio (PAPR), demonstrate the linearizability of the DPA.