Antenna in the terahertz band for Radioastronomy applications

A submillimeter ultra-wideband Tapered Slot Antenna (TSA) is presented. The operation frequency band goes from 0.6 THz to 2 THz, with symmetric radiation patterns from 0.9 THz to 1.8 THz. Good gaussicity levels are achieved (above 80%) and the substrate width limitation has been overcomed by the use of a dielectric wedge over a Gallium Arsenide wafer, where the photonic excitation is placed. With the designed TSA, a phased array with three elements is also presented, showing the radiated power in terms of the scanning angle.