Min Han, S. Moon, Jung-hun Oh, B. Lim, T. Baek, S. Choi, Y. Baek, Y. Chae, Hyun‐Chang Park, Sam-Dong Kim, J. Rhee
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Two-Stage 94 GHz drive Amplifiers Using 0.1-μm Metamorphic HEMT Technology
In this paper, millimeter-wave 94 GHz drive amplifiers based on metamorphic high electron mobility transistors (MHEMTs) were designed and fabricated. The fabricated 100 nm gate length MHEMT devices exhibit DC characteristics with a drain current density of 690 mA/mm and an extrinsic transconductance of 770mS/mm. The current gain cutoff frequency (fT) and the maximum oscillation frequency (fmax) are 185 GHz and 230 GHz, respectively. The matching circuit of amplifier was designed using CPW (coplanar wave-guide) transmission line. The fabricated amplifier shows a good S21 gain of 7.79 dB, an input return loss (S11) of -16.5 dB and an output return loss (S22) of-15.9 dB.
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