Persona: Poyatos Martinez, David
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Instituto Nacional de Técnica Aeroespacial
El Instituto Nacional de Técnica Aeroespacial es el Organismo Público de Investigación (OPI) dependiente del Ministerio de Defensa. Además de realizar actividades de investigación científica y de desarrollo de sistemas y prototipos en su ámbito de conocimiento, presta servicios tecnológicos a empresas, universidades e instituciones.
El INTA está especializado en la investigación y el desarrollo tecnológico, de carácter dual, en los ámbitos de la Aeronáutica, Espacio, Hidrodinámica, Seguridad y Defensa.
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Poyatos Martinez
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David
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53 resultados
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Mostrando 1 - 10 de 53
Publicación Restringido Electromagnetic Characterization of Corner Reflectors for Calibration of SAR Technology(IEEE, 2025-05-21) Ramos Somolinos, David; Sánchez Sánchez, Gema; Auñón Marugán, Alicia; Gimeno Martinez, Nuria; Casal Vázquez, Nuria; Cuerda Muñoz, Juan Manuel; Poyatos Martinez, David; Plaza Gallardo, BorjaSynthetic aperture radar (SAR) technology is present in a variety of Earth observation missions, like PAZ satellite, gathering information in such important fields as national defence, high resolution mapping environmental research, etc. To guarantee correct and accurate data, the SAR system must be appropriately calibrated. While there are several means to achieve this, passive elements such as corner reflectors are frequently used for the task. In this work, three calibration corner reflectors are studied: a reference steel model, an aluminium prototype manufactured according to a new geometry and a polylactic acid (PLA) model whose surface is coated with conductive nickel paint. The radar cross-section (RCS) of these reflectors is simulated using Ansys HFSS software and measured in the bistatic anechoic chamber (BIANCHA) belonging to the National Institute of Aerospace Technology (INTA). Finally, these results are compared with each other and with the theoretical RCS of the trihedrals.Publicación Acceso Abierto Diseño, simulación y medidas de un UCAV de baja observabilidad(Ministerio de Defensa, 2023-11) Ruiz Carrasco, Jose Raimundo; Guzmán Fernández-Fígares, Javier; Rodríguez Amor, José Roberto; Plaza Gallardo, Borja; Poyatos Martinez, DavidEl presente artículo expone el trabajo realizado por el INTA en el Task Group NATO/STO/SET-252 cuyo fin es diseñar y fabricar un modelo de validación de un UCAV (vehículo aéreo de combate no tripulado) representativo en términos de complejidad geométrica teniendo en cuenta el uso de materiales para la reducción de los principales mecanismos de dispersión electromagnética. La computación electromagnética (CEM) es una herramienta de ingeniería crucial en el proceso de diseño general y se utiliza para identificar los centros de dispersión, para evaluar el efecto de los recubrimientos o distorsiones como la rugosidad de la superficie y, finalmente, para determinar la firma de radar del modelo. Con respecto al creciente número de vehículos autónomos no tripulados, los resultados no solo son relevantes para el ámbito militar, sino también son valiosos para el control del tráfico aéreo civil y la vigilancia aérea.Publicación Acceso Abierto New Benchmark Radar Targets for Scattering Analysis and Electromagnetic Software Validation(The EM Academy, 2008-05-14) Escot Bocanegra, D.; Poyatos Martinez, David; Fernández Recio, R.; Jurado Lucena, A.; Montiel, I.; Instituto Nacional de Técnica Aeroespacial (INTA)A validation process, in which simulations and measurements are compared, is necessary to have confidence in the results obtained by numerical methods that solve scattering problems. This paper presents Radar Cross Section (RCS) measurements of new targets suitable for electromagnetic software comparison and validation. These measurements can be used as an RCS reference data for testing existing and future codes, as well as for the analysis of the scattering mechanisms.Publicación Acceso Abierto Comparison of Metal-Backed Free-Space and Open-Ended Coaxial Probe Techniques for the Dielectric Characterization of Aeronautical Composites(Multidisciplinary Digital Publishing Institute (MDPI), 2016-06-24) López Rodríguez, P.; Escot Bocanegra, D.; Poyatos Martinez, David; Weinmann, F.; Instituto Nacional de Técnica Aeroespacial (INTA); Ministerio de Economía y Competitividad (MINECO); Agencia Estatal de Investigación (AEI)The trend in the last few decades is that current unmanned aerial vehicles are completely made of composite materials rather than metallic, such as carbon-fiber or fiberglass composites. From the electromagnetic point of view, this fact forces engineers and scientists to assess how these materials may affect their radar response or their electronics in terms of electromagnetic compatibility. In order to evaluate this, electromagnetic characterization of different composite materials has become a need. Several techniques exist to perform this characterization, all of them based on the utilization of different sensors for measuring different parameters. In this paper, an implementation of the metal-backed free-space technique, based on the employment of antenna probes, is utilized for the characterization of composite materials that belong to an actual drone. Their extracted properties are compared with those given by a commercial solution, an open-ended coaxial probe (OECP). The discrepancies found between both techniques along with a further evaluation of the methodologies, including measurements with a split-cavity resonator, conclude that the implemented free-space technique provides more reliable results for this kind of composites than the OECP techniquePublicación Restringido Indoor 3D Full Polarimetric Bistatic Spherical Facility for Electromagnetic Tests(Institute of Electrical and Electronics Engineers, 2010-08-05) Escot Bocanegra, D.; Poyatos Martinez, David; Aguilar Rosado, Juan Angel; Montiel, I.; González, Iván; Sáez de Adana, F. M.; Instituto Nacional de Técnica Aeroespacial (INTA)A new indoor facility for electromagnetic measurements has been developed and built at the Detectability and Electronic Warfare Laboratory, INTA, Spain. The system was designed to extend the previous capabilities so that not only monostatic but also bistatic radar cross section (RCS) tests could be easily conducted. Due to limited space, far-field radar cross sections in the system are restricted to small targets, but this layout will allow the researchers to investigate ReS near-field-to-far-field transformations. The system was also conceived to be versatile enough to carry out other tests, such as near-field antenna measurements, material-absorption measurements, and electromagnetic characterization of materials. The paper describes the novel concept behind the facility, and presents some preliminary measurement results on different applications.Publicación Restringido Study of the scattering mechanisms of a set of conospheres(Institute of Electrical and Electronics Engineers, 2010-05-12) Fernández Recio, R.; Jurado Lucena, A.; Errasti Alcalá, B.; Escot Bocanegra, D.; Poyatos Martinez, David; Instituto Nacional de Técnica Aeroespacial (INTA)This paper presents Radar Cross Section (RCS) measurements and predictions of a set of three conospheres suitable for electromagnetic software validation. These measurements can be used as a RCS reference data for testing existing and future codes, as well as for the analysis of the scattering mechanisms present in this kind of objects. The association between the scattering mechanism and its response is specially valuable in a validation process, in which simulations and measurements are compared, to identify the possible weak points of the electromagnetic tool.Publicación Acceso Abierto Characterization of Joints between Carbon Fiber Composite Parts Using a Microstrip Transmission Line Method(Multidisciplinary Digital Publishing Institute (MDPI), 2021-02-06) Plaza Gallardo, Borja; López, Daniel; Poyatos Martinez, David; Agencia Estatal de Investigación (AEI)The electromagnetic performance of aerial platforms, which are composed mostly of nonmetallic materials, is a subject of great interest at present time. The behavior of this type of composite structure against electromagnetic environmental effects (E3), such as lightning, is not well-studied as in the case of metalic structures. The purpose of this article is to characterize the joints present in aerial platforms constructed mainly of nonmetallic composite materials. The study of these joints is fundamental because electrical discontinuities or preferential routes can produce changes in the electromagnetic behavior of an aircraft. The proposed measurement system for the characterization of these joints is a microstrip line. The flexibility of the test setup allows for evaluation of different joints in carbon fiber composite (CFC) samples with a different number of plies. Additionally, approximated models of the behavior of the joints as well as the detection of possible defects in the joining process are reported.Publicación Acceso Abierto Doble línea microstrip para extracción de permitividad a temperaturas extremas(URSI, 2025-09) Cublier Martínez, Aymar; Auñón Marugán, Alicia; Ramos Somolinos, David; Sanz, Ruy; Plaza Gallardo, Borja; Poyatos Martinez, David[en] Many cryogenic missions for space observation have been launched in the past. In all of them, it was key to insulate the observation devices from thermal and electromagnetic perturbations. A solid understanding of materials and signal propagation is therefore essential to achieve full spectral isolation for cryogenic systems. This work introduces a non-resonant electromagnetic characterization method to extract permittivity and loss in dielectric materials at extreme temperatures. The authors design, simulate and validate a double microstrip transmission line and implement a flexible extraction method to measure permittivity over a wide frequency range, using materials such as CuClad 250, ROGERS 4350B and FR-4. Albeit refinements to the extraction process and comparison with real measurements in a cryogenic setting are possible, the resulting system is shown to be consistent and reliable across all simulations.Publicación Acceso Abierto INMARS: SURFACE-ORBITAL TELECOMMUNICATION SYSTEM ON MARS. DESIGN AND TESTING(8th Planetary Sciences and Solar System Exploration Congress, 2025-05-26) Ruiz Carrasco, Jose Raimundo; Serrano Santos, Felipe; Plaza Gallardo, Borja; Poyatos Martinez, David; Arruego, IgnacioThe exploration of Mars has been developed by multiple vehicles (rovers and orbiters) deployed since the dawn of the space race, and lately with the Perseverance mission. The acquisition of data and samples is relevant to study the planet and prepare future manned missions. In this regard, the National Institute for Aerospace Technology (INTA) performs R+D of impact probes; in particular, the InMars mission aims to establish an operational probe network on Mars for the acquisition and transmission of atmospheric data. This will provide better understanding of the planet's atmospheric dynamics and help to reduce risks for future landings on Mars. The required surface-orbital telecommunication system must perform a UHF band network, linking probes with Mars orbiters, and operate under severe environmental, impact, and reduced space conditions, among others. This communication will cover the preliminary design and planned testing of the system and its main components.Publicación Restringido UAVEMI project: Numerical and experimental EM immunity assessment of UAV for HIRF and lightning indirect effects(Institute of Electrical and Electronics Engineers, 2016-07-07) García, Salvador G.; Silva, F.; Escot Bocanegra, D.; Pascual, Enrique; Pantoja, M. F.; Riu, Pere J.; Añón Cancela, M.; Álvarez, J.; Cabello, M.; Pous, M.; Fernández Romero, Sergio; Trallero Vela, R.; Poyatos Martinez, David; Nuño, L.; Instituto Nacional de Técnica Aeroespacial (INTA)The UAVEMI project, funded by the Spanish Ministry of Economy and Competitiveness, gathers a consortium formed by several research and development institutions and one industrial partner. The main goal is to develop innovative experimental and numerical approaches for the assessment of the electromagnetic compatibility of unmanned air vehicles, under high intensity radiated fields, lightning indirect effects and non-nuclear electromagnetic pulses. This contribution describes the capabilities currently being developed under the project.
