Hesler, J. L., Hall, W. R., Crowe, T. W., Weikle, R. M., Bradley, R. F., & Pan, S. - K. (1996). Submm wavelenght waveguide mixers using planar Schottky barier diods. In _Proc. 7<sup>th</sup> Int. Symp. Space Terahertz Technol._ (462).