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W-band double-balanced down-conversion mixer with Marchand baluns in silicon-germanium technology

W-band double-balanced down-conversion mixer with Marchand baluns in silicon-germanium technology

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Presented is a monolithic W-band (75–110 GHz) down-conversion mixer consisting of a double-balanced core, Marchand-type on-chip baluns at inputs, and a two-stage output buffer, fabricated in a 200 GHz fT SiGe technology. Including the loss for input baluns, this mixer exhibits conversion gains of 14.4±2.8 dB and single sideband (SSB) noise figures of less than 19.5 dB across the entire W-band, drawing 28 mA from a 3.3 V supply.

References

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      • Perndl, W., Knapp, H., Wurzer, M., Aufinger, K., Meister, T.F., Bock, J., Simburger, W., Scholtz, A.L.: `A low-noise and high-gain double-balanced mixer for 77 GHz automotive radar front-ends in SiGe bipolar technology', IEEE RFIC Symp. Dig., June 2004, Fort Worth, TX, USA.
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      • Dehlink, B., Wohlmuth, H.-D., Forstner, H.-P., Knapp, H., Trotta, S., Aufinger, K., Meister, T.F., Bock, J., Scholts, A.L.: `A highly linear sige double-balanced mixer for 77 GHz automotive radar applications', IEEE RFIC Symp. Dig., June 2006, San Francisco, CA.
    3. 3)
      • N. Marchand . Transmission-line conversion transformers. Electronics , 12 , 142 - 145
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      • K.S. Ang , I.D. Robertson . Analysis and design of impedance-transforming planar Marchand baluns. IEEE Trans. Microw. Theory Tech. , 2 , 402 - 406
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