A research team from Chalmers University of Technology in Sweden developed a new subharmonic graphene FET mixer at microwave frequencies. This could pave the way for new opportunities in future electronics as it enables compact circuit technology, potential to reach high frequencies and integration with silicon technology.

A mixer combines two (or more) electronic signals into one or two composite output signals. The ability in graphene to switch between hole or electon carrier transport via the field effect requires a unique niche for graphene for rf ic applications. The researchers say this symmetrical electrical characteristic has enabled them to build a G-FET subharmonic resistive mixer using only one transistor.