A V-BAND CMOS SUB-HARMONIC MIXER WITH INTEGRATED FREQUENCY DOUBLER AND 180 degrees OUT-OF-PHASE SPLITTER

[[abstract]]A V-band sub-harmonic mixer with an integrated frequency doubler and a 180 degrees out-of-phase splitter using standard 0.13 mu m CMOS technology is reported. The sub-harmonic mixer comprises a current-reused bleeding mixer, a baseband amplifier, a 180 degrees (Wilkinson-power-divider-based) out-of-phase splitter, and a frequency doubler. The mixer consumed 31.5 mW and achieved input return loss at RF port better than -10 dB for frequencies from 49.8 to 63 GHz. At IF of 20 MHz, the mixer achieved maximum conversion gain of 9.5 dB at RF of 53 GHz. The corresponding 3-dB bandwidth (omega(3dB)) of RF is 9.6 GHz (48.4-58 GHz). The measured LO-to-RF and LO-to-IF isolation were better than 50 dB over the frequency band of interest. In addition, the measured input 1-dB compression point (P(IdB)) and input third-order intermodulation point were -8 dBm and 2.2 dBm, respectively, at RF of 60 GHz. These results demonstrate the proposed mixer architecture is very promising for high-performance V-band RFIC applications. (C) 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:870-875, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25888[[note]]SC