Two new uniplanar mixer designs are described. These mixers are being tested at ifA-band, but will be scaled to higher millimeter wave frequencies. The goal is to develop broad-band monolithically integrated mixers which utilize surface-oriented hot electron devices as nonlinear elements.
W. Grammer, W. Grammer,
"Uniplanar integrated Ka-band mixer", Proc. SPIE 1514, 15th International Conference on Infrared and Millimeter Waves, 15141V (1 December 1990); doi: 10.1117/12.2301477; https://doi.org/10.1117/12.2301477