Low-Cost and Fully Metallic Interchangeable Leaky-Wave Antenna Based on 3D-Printing Technology for Multi-Beam Operation Díaz-Martín, Miguel Molero Jiménez, Carlos Martínez-García, Ginés Baena Molina, Marcos leaky wave Antenna periodic structures Global data consumption is experiencing exponential growth, driving the demand for wireless links with higher transmission speeds, lower latency, and support for emerging applications such as 6G. A promising approach to address these requirements is the use of higher-frequency bands, which in turn necessitates the development of advanced antenna systems. This work presents the design and experimental validation of a reconfigurable, low-cost leaky-wave antenna capable of controlling the propagation direction of single-, dual-, and triple-beam configurations in the FR3 frequency band. The antenna employs slotted periodic patterns to enable directional electromagnetic field leakage, and it is based on a cost-effective and simple 3D-printing fabrication process. Laboratory testing confirms the theoretical and simulated predictions, demonstrating the feasibility of the proposed antenna solution. 2025-12-01T08:50:03Z 2025-12-01T08:50:03Z 2025-11-30 journal article Díaz-Martín, M.; Molero, C.; Martínez-García, G.; Baena-Molina, M. Low-Cost and Fully Metallic Reconfigurable Leaky-Wave Antenna Based on 3D-Printing Technology for Multi-Beam Operation. Electronics 2025, 14, 4723. https://doi.org/10.3390/electronics14234723 https://hdl.handle.net/10481/108491 10.3390/electronics14234723 eng http://creativecommons.org/licenses/by/4.0/ open access Atribución 4.0 Internacional MDPI