1. Design of Adaptive Highly Efficient GaN Power Amplifier for Octave-Bandwidth Application and Dynamic Load Modulation.
- Author
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Chen, Kenle and Peroulis, Dimitrios
- Subjects
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ELECTRONIC amplifiers design & construction , *GALLIUM arsenide , *BANDWIDTHS , *DYNAMIC loads , *ELECTRONIC modulation , *HIGH electron mobility transistor circuits , *HARMONIC analysis (Mathematics) - Abstract
This paper presents a novel adaptive power amplifier (PA) architecture for performing dynamic-load-modulation. For the first time, a dynamically-load-modulated PA design that achieves octave bandwidth, high power and high efficiency simultaneously is experimentally demonstrated. This PA design is based on a commercial GaN HEMT. The output matching scheme incorporates a broadband static matching for high-efficiency at the maximum power level and a wideband dynamic matching for efficiency enhancement at power back-offs. The impedance and frequency tunability is realized using silicon diode varactors with a very high breakdown voltage of 90 V. Experimental results show that a dynamic-load-modulation from maximum power to 10-dB back-off is achieved from 1 to 1.9 GHz, with a measured performance of \approx10-W peak power, \approx10-dB gain, 64%–79% peak-power efficiency, and 30%–45% efficiency at 10-dB power back-off throughout this band. [ABSTRACT FROM PUBLISHER]
- Published
- 2012
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