A 100-120 GHz quadruple-LO pumped harmonic diode mixer using standard GaAs based 0.15-/spl mu/m PHEMT process

A 100-120 GHz 4/spl times/ sub-harmonically pumped diode mixer using standard 0.15-/spl mu/m PHEMT process on 4-mil GaAs substrate is presented. Fourth order mixing was performed using an anti-parallel diode pair. Filters and harmonic stubs are implemented using grounded coplanar waveguide structure. The average conversion loss is 27 dB from 100 to 120 GHz, in a compact chip size of 1.0 /spl times/ 1.0 mm/sup 2/.