Programa del congreso

En este trabajo presentamos el diseño de un array de lentes geodésicas alimentadas por otro array de lentes geodésicas que permite generar 83 haces independientes en un rango de apuntamiento de 100° en el plano horizontal y 70° en el plano vertical. El escaneo en el plano horizontal se consigue mediante un array de lentes de Luneburg generalizadas geodésicas, mientras que para apuntar en el plano vertical se utiliza un conformador de haz compuesto por una lente mitad de ojo de pez de Maxwell. Ambas lentes se diseñan con un eficiente código de trazado de rayos y con el objetivo de mantener un alto nivel de cruce entre haces contiguos. La antena resultante es totalmente metálica y se puede fabricar de manera monolítica mediante fabricación aditiva directamente metálica.

This paper presents a novel design methodology for series-fed Continuous Transverse Stub (CTS) antennas, leveraging Ridge Gap Waveguides (RGW) as the feeding mechanism instead of traditional parallel plate waveguides. This approach is designed to introduce discrete phase shifts to each feed line, eliminating the conical scanning path associated with conventional series-fed CTS antennas and enabling scanning in the H-plane with constant azimuth. The RGW feeding network incorporates a fingerprint design to improve decoupling between adjacent channels, offering a compact, low-loss solution. The methodology is applicable to CTS arrays with arbitrary numbers of radiators and amplitude distributions. The performance of the proposed technique is validated by synthesizing two arrays with different amplitude distributions and demonstrating the feasibility of achieving H-plane scanning with the proposed feeding approach.

This work presents a fully-metallic 2×2 monopulse antenna array operating at 60 GHz, implemented in a single-layer configuration using Gap Waveguide (GW) technology. The proposed design achieves the generation of one sum (Σ) and two difference patterns (Δ_H, Δ_E) with a highly compact and low-profile architecture. Both the comparator network and the feeding cavities are integrated into the same metallic layer, while the top cover acts as the only closing structure, eliminating the need for complex multi-layer assembly or electrical contact between parts. By exploiting the phase inversion properties of GGW and RGW transitions, the antenna avoids the use of traditional hybrid couplers, thus simplifying the design and enhancing performance. Full-wave simulations validate the concept, showing high radiation efficiency and excellent pattern isolation. This approach paves the way for compact, low-cost and high-performance monopulse solutions in millimeter-wave applications such as radar, tracking systems and smart sensing platforms.

This work presents a comparative study of mul- tiple antenna array geometries for direction-of-arrival (DoA) estimation on-board Low Earth Orbit (LEO) satellite platforms. The performance of the Multiple Signal Classification (MUSIC) algorithm is evaluated under uniform and non-uniform array configurations, including Uniform Rectangular Arrays (URA), circular, concentric-ring, and sparse-derived structures such as nested, super-nested, and coprime arrays. All configurations are constrained to a common array surface to reflect realistic physical limitations on board LEO systems. The analysis focuses on the angular Root Mean Squared Error (RMSE) as a fun- ction of Signal-to-Noise Ratio (SNR) and the number of active elements. Results demonstrate that certain sparse configurations can achieve comparable or superior resolution to dense arrays with significantly fewer sensors, making them highly suitable for embedded systems. The study highlights the trade-off between spatial diversity, structural compactness, and DoA estimation accuracy, offering practical insights for array design in spatial signal processing applications.