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A millimeter-wave multifunction HEMT mixer

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5 Author(s)
Kim, M. ; Rockwell Inst. Sci. Center, Thousand Oaks, CA, USA ; Hacker, J.B. ; Sovero, E.A. ; Deakin, D.S.
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A monolithic chip with a single 80 μm HEMT device, 1.25×3.0 mm2 in size, has been tested as both a fundamental and a subharmonic mixer. With input filter networks for K- and Q-bands providing two separate radio frequency/local oscillator (RF/LO) channels to the gate, the chip produces an IF signal from DC to 4 GHz at the drain. The mixer operates in three independent modes with the highest conversion gain of 6.9 dB in K-band fundamental mode, the best DSB noise figure of 4.4 dB in Q-band fundamental mode, and better than 20 dB of on-chip LO-to-RF isolation in Q-band subharmonic mode. In all three modes, the active mixer has shown positive conversion gain

Published in:

Microwave and Guided Wave Letters, IEEE  (Volume:9 ,  Issue: 4 )

Date of Publication:

Apr 1999

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