Browsing CTM - Indexed Articles in Conferences by Author "6335"
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ItemElliptical Monopole Antenna on InP Substrate for Sub-THz RTD-based Oscillators( 2018) Henrique Salgado ; Hugo Miguel Santos ; Luís Manuel Pessoa ; Pinho,P ; 296 ; 4760 ; 6335The 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.
ItemScalable High-Gaussicity Split-Block Diagonal Horn Antenna for Integration with Sub-THz Devices( 2019) Erick Delgado Lima ; Henrique Salgado ; Moro Melgar,D ; Luís Manuel Pessoa ; Pinho,P ; Hugo Miguel Santos ; 6335 ; 4760 ; 296 ; 7162In 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.