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Key GaN HEMT front-end circuits for next generation AESA radar/EW applications are presented. The circuits are an S-band 20 W MMIC HPA reaching 50 % measured PAE, a two-stage S-band MMIC LNA showing a measured NF of 1.3 dB, and a DC-18 GHz SPDTs showing a measured insertion loss of less than 2 dB at 18 GHz. Furthermore, a 2–18 GHz front-end circuit with a co-integrated two-stage LNA and a T/R-switch...
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