An ultra-high efficiency high power Schottky varactor frequency doubler to 180–200 GHz

Abstract

This paper presents simulation and test data for a fixed-tuned ultra-high efficiency high power Schottky diode 180-200 GHz frequency doubler. The doubler was designed for an input power of 100-200 mW and tested producing flange-to-flange peak efficiency greater than 42.5% and output power greater than 80 mW in 185-195 GHz band. The 3 dB bandwidth was measured at more than 13%. In terms of output power and total efficiency these results exceed the current state of the art at the given frequency and input power.