Browsing by Author "Santos, H. M."
Now showing 1 - 2 of 2
Results Per Page
Sort Options
- Elliptical monopole antenna on InP substrate for sub-THz RTD-based oscillatorsPublication . Santos, H. M.; Pessoa, Luis; Salgado, Henrique; Pinho, PedroThe high permittivity of InP substrates has been a limiting factor for the bandwidth and efficiency of antennas fabricated in this material. In this manuscript we propose an elliptical monopole, monolithically fabricated in InP, fed by a CPW line. The suggested topology was simulated using HFSS finite element method. Input reflection coefficient measurements were performed on the monopole to validate the proposed antenna. Simulated and measured -10 dB bandwidths of 27 and 24 GHz were obtained, respectively. The peak simulated efficiency and realized gain were 95.37% and 4.6 dBi.
- Scalable high-gaussicity split-block diagonal horn antenna for integration with Sub-THz devicesPublication . Santos, H. M.; Lima, E. D.; Pinho, Pedro; Pessoa, L. M.; Moro-Melgar, D.; Salgado, H. M.In 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.