Millimetre wave transmitter based on a few-layer graphene frequency multiplier

In this work, a millimetre/submillimetre wave transmitter prototype integrating a graphene based frequency multiplier and a diagonal horn antenna is presented. With a driving signal in the WR-28 frequency band (26.5–40 GHz), an output signal in the WR-3 frequency band (220–330 GHz) is generated and radiated. A prototype has been manufactured using high precision 3D printing techniques. The performance with multiplication orders 5, 7 and 9 has been compared, obtaining maximum power levels of about −45 dBm, measured at a distance of 250 mm. Measured radiation patterns are also presented.