Solid state 448GHz frequency doubler using intergrated schottky membrane technology

The design is to accomplish a frequency doubler by using thin membrane sub-millimeter wave integrated circuit fabrication technology. The Goubau line theory is firstly incorporated here to predefine the dimension of the channel, which is the key to the doubler's performance. The detailed linear and nonlinear co-simulation method is presented as followed, usually several iterations are needed during the optimization flow. Finally, the expected pass-band of doubler is from 430GHz to 470GHz over 22% efficiency. And the mesa size is 10μm×8.2μm and the membrane thickness is 5μm. It shows that we can realize high efficiency frequency multipliers even up to several THz in the future by using this thin membrane fabrication technology.