Comparison of C-Doped AlN/GaN HEMTs and AlN/GaN/AlGaN Double Heterostructure for mmW Applications - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2018

Comparison of C-Doped AlN/GaN HEMTs and AlN/GaN/AlGaN Double Heterostructure for mmW Applications

Résumé

We report on a comparison of the ultrathin (sub-10 nm barrier thickness) AlN/GaN heterostructure using two types of buffer layers for millimeter-wave applications: 1) carbon doped GaN high electron mobility transistors (HEMTs) and 2) double heterostructure field effect transistor (DHFET). It is observed that the carbon doped HEMT structure shows superior electrical characteristics, with a maximum drain current density Id of 1.5 A/mm, an extrinsic transconductance Gm of 500 mS/mm and a maximum oscillation frequency fmax of 242 GHz while using a gate length of 120 nm. The C-doped structure delivering high frequency performance together with an excellent electron confinement under high bias enabled to achieve a state-of-the-art combination at 40 GHz of output power density (POUT = 7 W/mm) and power added efficiency (PAE) above 52% up to VDS = 25V in pulsed mode. I.
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Dates et versions

hal-02356753 , version 1 (02-12-2020)

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Riad Kabouche, Joff Derluyn, Roland Püsche, Stefan Degroote, Marianne Germain, et al.. Comparison of C-Doped AlN/GaN HEMTs and AlN/GaN/AlGaN Double Heterostructure for mmW Applications. 13th European Microwave Integrated Circuits Conference (EuMIC 2018), Sep 2018, Madrid, Spain. pp.5-8, ⟨10.23919/EuMIC.2018.8539962⟩. ⟨hal-02356753⟩
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