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60 GHz MMIC double balanced Gilbert mixer in mHEMT technology with integrated RF, LO and IF baluns

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4 Author(s)
Gunnarsson, S.E. ; Dept. of Microtechnol. & Nanosci., Chalmers Univ. of Technol., Goteborg ; Gavell, M. ; Kuylenstierna, D. ; Zirath, H.

A 60 GHz MMIC double balanced Gilbert mixer (DBGM) with integrated RF, LO and IF baluns has been designed, fabricated in an mHEMT MMIC technology and characterised with probed measurements. Although a standard mixer topology for integrated circuits in the low gigahertz region, the DBGM has had very little impact in the millimetre-wave range. To the authors' knowledge, the presented DBGM operates at the highest RF frequency ever published for any FET-based Gilbert type mixer, double or single balanced. A measured down conversion gain of 1.5 dB at 60 GHz is obtained with a DC power consumption of 300 mW. Further, IF bandwidth, isolation between the LO, RF and IF ports, 1 dB compression point for the RF input, and LO input power is presented

Published in:

Electronics Letters  (Volume:42 ,  Issue: 24 )