A Compact V-band Subharmonic Resistive Mixer Using LO Stacked Marchand Balun and RF Miniaturized Power Divider

A compact V-band subharmonic resistive mixer with high linearity and isolation is proposed, which includes an LO stacked Marchand balun and miniaturized RF power divider. The stacked layout for LO balun is used to increase coupling factor and obtain low insertion loss and compact size than planar one. The RF power divider utilizes the reduce-size technique to miniaturize the required transmission line. Therefore, the proposed mixer exhibits compact size of 1.0 x 0.8 mm² . The measured conversion loss is less than 15 dB at RF bandwidth of 37 to 60 GHz with 5.8-GHz fixed IF frequency. The LO-to-IF and LO-to-RF isolations are better than 39 dB. The excellent input P_1dB and input IP3 are obtained as high as 10 dBm and 28 dBm, respectively.