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E-Band Low-Noise Amplifier MMICs Using Nanogate InGaAs/InAlAs HEMT Technology
IEICE TRANSACTIONS on Electronics Vol.E93-C No.8 pp.1251-1257
Publication Date: 2010/08/01
Online ISSN: 1745-1353
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Heterostructure Microelectronics with TWHM 2009)
Category: III-V High-Speed Devices and Circuits
maximum oscillation frequency,
current-gain cutoff frequency,
minimum noise figure,
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E-band low-noise amplifier (LNA) monolithic millimeter-wave integrated circuits (MMICs) were developed using pseudomorphic In0.75Ga0.25As/In0.52Al0.48As high electron mobility transistors (HEMTs) with a gate length of 50 nm. The nanogate HEMTs demonstrated a maximum oscillation frequency (fmax) of 550 GHz and a current-gain cutoff frequency (fT) of 450 GHz at room temperature, which is first experimental demonstration that fmax as high as 550 GHz are achievable with the improved one-step-recessed gate procedure. Furthermore, using a three-stage LNA-MMIC with 50-nm-gate InGaAs/InAlAs HEMTs, we achieved a minimum noise figure of 2.3 dB with an associated gain of 20.6 dB at 79 GHz.