Abstract
AlGaN/GaN high-electron mobility transistors (HEMTs) with varied Tri-gate topologies have been fabricated and influences of the fin-shaped nano-channels on device parasitics are examined. Through S-parameter measurements and modelling of the designed Fin-FETs, a detailed RF investigation on intrinsic device parameters is performed under different biasing schemes. Corresponding RF performances and transfer characteristics as well as the derived small-signal parameters of the measured devices are extracted by employing 3-D EM FET model analysis at 110 GHz. Comparisons between the designed fin-geometries and intrinsic device parameters have proven flatter gm, gds and fT responses, which are presented through experimental results in detail for the first time.
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