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