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A V-band CMOS sub-harmonic mixer with integrated frequency doubler and 180°out-of-phase splitter

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4 Author(s)
Chi-Chen Chen ; Dept. of Electr. Eng., Nat. Chi Nan Univ., Puli, Taiwan ; Yo-Sheng Lin ; Jen-How Lee ; Jin-Fa Chang

A V-band sub-harmonic mixer with an integrated frequency doubler and a 180o out-of-phase splitter using standard 0.13 μm CMOS technology is reported. The sub-harmonic mixer comprises a current-reused bleeding mixer, a baseband amplifier, a 180° (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 GHz 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 (ω3db) 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 (P1dB) and input third-order inter-modulation point (IIP3) 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.

Published in:

VLSI Design, Automation and Test (VLSI-DAT), 2011 International Symposium on

Date of Conference:

25-28 April 2011