A 700-2800MHz Switchless Class-G Power Amplifier with Two-Quadrant Modulation for Back-off Efficiency Improvement
Xiaofan Chen, Ming Zhao, Wenhua Chen, Zhenghe Feng
Abstract
In this paper, a novel Switchless class-G (SLCG) Power Amplifier (PA) is proposed to improve back-off efficiency by allowing transistors operate across the 1 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">st</sup> and 3 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">rd</sup> quadrants of the I-V curves. Based on the technique, a 700-2800MHz demonstration PA is developed using commercial GaN HEMTs, exhibiting 43dBm saturated power and 45-57.5% −6dB back-off efficiency. To the best of our knowledge, this is the state-of-the-art performance of multi-octave highly efficient PAs.
Topics & Concepts
AmplifierTransistorClass (philosophy)Computer sciencePower (physics)Electrical engineeringPhysicsTelecommunicationsArtificial intelligenceEngineeringBandwidth (computing)Quantum mechanicsVoltageAdvanced Power Amplifier DesignRadio Frequency Integrated Circuit DesignAdvanced DC-DC Converters