Abstract
This work presents an advanced approach to the non-parametric optimization of antennas for space applications, with particular emphasis on achieving high efficiency and robust performance. Unlike traditional parametric design methods, which constrain antenna geometry to a predefined set of variables, the non-parametric approach enables greater flexibility in shaping the radiating structure, allowing the exploration of innovative solutions beyond conventional design spaces. The study employs numerical algorithms and global optimization techniques to directly modify either the current distribution or the antenna geometry, without imposing strict constraints on its form. This approach enables improved performance in terms of gain, radiation efficiency, axial ratio, and loss minimization—key metrics for space missions, where system reliability and resource efficiency are critical.
The methodology is validated through two representative case studies. The first involves the design of a waveguide feeder for the Ka Earth observation band, which requires precise radiation-pattern control and high efficiency. The second focuses on the optimization of a patch antenna element intended for integration into an array, where mutual coupling and array-level performance introduce additional design challenges.
High-fidelity electromagnetic simulations are combined with adaptive optimization strategies to manage the computational complexity of the problem. Results demonstrate that the proposed approach achieves superior performance compared to classical techniques, while offering enhanced flexibility in meeting multiple design requirements. This work supports the development of next-generation space-borne antenna systems.
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Speaker
Nicholas Sesto Gorella graduated in 2020 with a degree in Mechanical Engineering from the University of Trieste, completing a thesis entitled “Dynamically Balanced Pointing System for CubeSat Applications.” His academic work focused on the design and analysis of precision pointing mechanisms tailored to the constraints of small satellite platforms.
Following his graduation, Nicholas was awarded a two-year research grant, during which he contributed to an ESA ARTES project focused on developing high-gain V-band antennas for inter-satellite link (ISL) applications. His work involved both mechanical design and electromagnetic considerations, with particular attention to integrating advanced antenna systems within the strict mass, volume, and thermal constraints typical of spaceborne platforms.
Nicholas subsequently joined PICOSATS S.r.l., where he is currently employed as a Mechanical Engineer and RF Antenna Designer. In this role, he is involved in the design, optimization, and integration of antenna systems for small satellites, combining multidisciplinary expertise in structural design, thermal management, and radio-frequency performance.
Nicholas activities include the development of innovative solutions for deployable and high-performance antennas, as well as participation in end-to-end system design for space missions.
His professional interests lie in the intersection of mechanical engineering and applied electromagnetics, with a focus on advanced antenna technologies for next-generation satellite systems.
Mechanical Engineer and RF Antenna Designer — PICOSATS
