Santos, H. M.Lima, E. D.Pinho, PedroPessoa, L. M.Moro-Melgar, D.Salgado, H. M.2019-11-272019-11-272019-11-21SANTOS, H. M.; [et al] – Scalable high-gaussicity split-block diagonal horn antenna for integration with Sub-THz devices. In Proceedings of the 16th European Radar Conference (EuRAD). Paris, France: IEEE, 2019. ISBN 978-2-87487-057-6. Pp. 1-4978-2-87487-057-6978-2-87487-054-5978-1-7281-3733-9http://hdl.handle.net/10400.21/10755In this paper we propose a high-gaussicity spline-profiled horn antenna, which is scalable in length and aperture to achieve higher gains whilst retaining a high Gaussian efficiency. A novel approach is used where a PSO is used for optimizing the spline, using the gaussicities at the operating frequencies as the objective function, which further improves side-lobe level and cross-polarization when compared to the state-of-the-art. With the proposed method, which was validated through FEM simulations in HFSS, reflection coefficients below -15 dB, gains greater than 25 dBi and gaussicities above 91% were obtained in the entire WR-3 band.engHornGaussicitySplit-BlockTerahertzconference object