Millimeter-wave GaAs monolithic multipliers

This paper describes the design, fabrication and experimental results for planar monolithic multipliers with output frequencies in W- and D-band. The multipliers are fabricated using FGC (Finite Ground Coplanar) lines which provide a low loss, low dispersion near-TEM structure. This structure allows circuit fabrication on full thickness wafers with no via holes. A variety of circuits have been designed and fabricated. Different W-band multipliers have an output efficiency of 22.9%, a peak output power of 66 milliwatts and an output bandwidth greater than 8 GHz in W-band. Initial D-band results show an uncalibrated output of approximately 100 /spl mu/W at 160 GHz.