A Broadband W-band Subharmonic Mixers Circuit Based on Planar Schottky Diodes

A balanced sub-harmonic fix-tuned mixer is designed precisely based on combination of linear/nonlinear circuit simulation. The influence of parasitic parameter on the performance of the mixer is studied by building three dimensional electromagnetic model of antiparallel GaAs Schottky diode. The mixer is realized based on rogers substrate process to minimize the cost and simplify the assembly. The mixer works in the 82-104 GHz band with a simulated conversion loss less than 7.3 dB when pumped with 3.6mW of local oscillator power.