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In this paper, we report a two-way sequential power amplifier (SPA) using GaN HEMTs. The proposed fully analog SPA delivers Psat of approximately 40dBm over 2–3 GHz covering 40% fractional bandwidth. The design consists of a 3dB input coupler, a main amplifier, a peak amplifier, and a 10dB output coupler for power combining. After proper designing and optimizing these critical wideband couplers in...
This article presents the winning power amplifier implemented with a gallium nitride (GaN) high electron mobility transistor (HEMT) and having power-added efficiency (PAE) greater than 85%. It will be shown that computer-aided design (CAD) simulation tools, accurate device models, and sensible design rules can produce first-pass power amplifier design success. An overview of design, fabrication, and...
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