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This paper presents the design and the experimental results of a C-Band Monolithic Microwave Integrated Circuit (MMIC) High Power Amplifier (HPA) based on a commercially available 0. 25\ m GaN-on-SiC technology and conceived for broadband Radar systems front-end integration. The HPA is based on a two-stage corporate topology and provides an output power higher than 22 W, with a power added efficiency and an associated gain greater than 40% and 24 dB, respectively, from 4 GHz to 5. 2GHz. Furthermore, small signal measurements show significant input and output return losses better than −12 dB and −15 dB. The compact overall chip area is 5 4. 8\ mm^2.
Forte et al. (Sun,) studied this question.
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