A D-band frequency doubler MMIC based on a 100-nm metamorphic HEMT technology

A coplanar single-ended frequency doubler based on a 100 nm metamorphic HEMT technology is presented. For an input power of 4.8 dBm, this doubler demonstrates an output power between 2.6 and -0.3 dBm over the bandwidth from 105 to 145 GHz, that is, a 3-dB bandwidth of 32% has been achieved. To the knowledge of the authors, this is the first reported multiplier based on MHEMT technology at D-band or higher frequencies.