Compact High-Gain Dual-Band Antenna for Full-Duplex Terahertz Communication in CubeSat Mega-Constellations

With the rise of CubeSat constellations, higher data rates are desired for commercial and scientific applications in space. A candidate technology for high-data-rate CubeSat communications is the terahertz (THz) band (0.1-10 THz), providing a large bandwidth at smaller wavelengths, pushing towards more compact technology. In this paper, a dual-band feed horn, utilizing a single commercially available WR3 waveguide, enhanced with a deployable reflector is designed and simulated. Gains of 40 dBi and 42 dBi are achieved at 218 GHz and 295 GHz respectively. The antenna can compactly fit on a 12U CubeSat and is explored as a solution for high-gain THz antennas within CubeSat requirements.