Recent advances in high-resolution Ground Penetrating Radar on board an Unmanned Aerial Vehicle

European Conference on Antennas and Propagation (EuCAP) (13th. 2019. Krakow, Poland

An Ultrathin 2-bit Near-Field Transmitarray Lens

A novel ultra-thin Near-Field 2-bit 24x24-element transmitarray lens working at X-Band is presented in this letter. The aim of this antenna is to focus in a point located in the Near-Field without using any complex feeding network. In order to obtain a planar lens with a very low profile, a 2-bit-design approach is used to diminish the number of layers used in the structure. The simulations have been done using a model based on the concept that the Near-Field of an array can be calculated as the sum of the Far-Field contributions of every single one of its elements. These are considered as plane apertures over which the tangential electric field is constant. In order to validate the results of this model, they are compared with both those obtained with a full-wave commercial software and those from measurements. Thus, a Near-Field-antenna is manufactured and measured showing the measurements good concordance with the results of the mode

Evaluation of Positioning Techniques for mm-Wave Portable Scanners

European Conference on Antennas and Propagation (12th, 2018, London

Unmanned aerial system for antenna measurement (UASAM)

European Conference on Antennas and Propagation (EuCAP 2018) (12th. 2018. London)The main goal of this contribution is to provide an overview of an Unmanned Aerial System for Antenna Measurement (UASAM), which will be presented at the AMTA Scientific Workshop on “UAV-based Antenna and Field Measurements”. UASAM is a compact low-cost system that can be used for in-situ antenna measurement and diagnostics. It makes use of a Real Time Kinematik (RTK) and a laser altimeter to georefer the measurements with cm-level accuracy. Field radiated by the Antenna Under Test (AUT) is measured with a low-cost power detector at several acquisition surfaces (even non-canonical surfaces) around the AUT (in the near field region). Next, an iterative phase retrieval technique is applied, being able to recover the AUT aperture fields. Furthermore, from these fields, Near-Field to Far-Field (NF-FF) transformation can be used to retrieve the radiation pattern. Several application examples for different kinds of AUTs will be shown in the workshop. In addition, the impact of positioning and geo-referring accuracy will be discussed as well. This system is of great interest for those industrial applications where antenna diagnostics and radiation pattern assessment capabilities are required (e.g. analysis of antenna arrays, tilt testing of base station antennas, etc.) avoiding the need of stopping operational conditions

Synthetic Aperture Radar Imaging System for Landmine Detection Using a Ground Penetrating Radar on Board a Unmanned Aerial Vehicle

This paper presents a novel system to obtain images from the underground based on ground penetrating radar (GPR). The proposed system is composed by a radar module mounted on board an unmanned aerial vehicle (UAV), which allows the safe inspection of dif cult-to-access areas without being in direct contact with the soil. Therefore, it can be used to detect dangerous buried objects, such as landmines. The radar measurements are coherently combined using a synthetic aperture radar (SAR) algorithm, which requires cm-level accuracy positioning system. In addition, a clutter removal technique is applied to mitigate the re ection at the air-soil interface (which is caused by impedance mismatching). Besides the aforementioned advantages, the system can detect both metallic and dielectric targets (due to the use of a radar instead of a metal detector) and it allows to obtain high-resolution underground images (due to the SAR processing). The algorithms and the UAV payload are validated with measurements in both controlled and real scenarios, showing the feasibility of the proposed system

Sistema de GPR embarcado en un UAV para la detección de objetos ocultos enterrados

This work presents a novel system to obtain images from the underground based on Ground Penetrating Radar (GPR). The proposed system is composed by a radar module mounted on board an Unmanned Aerial Vehicle (UAV), which allows the safe inspection of difficult-to-access areas without being in contact with the soil. Therefore, it can be used to detect dangerous buried objects, such as landmines. The radar measurements are coherently combined using a Synthetic Aperture Radar (SAR) algorithm, which requires a cm-level accurate positioning system. In addition, a clutter removal technique is applied to mitigate the reflection at the air-soil interface (due to the impedance mismatching). Besides the aforementioned advantages, the system can detect both metallic and dielectric targets (due to the use of a radar instead of a metal detector) and it allows to obtain high-resolution underground images (due to the SAR processing). The algorithms and the UAV payload are validated with measurements in both controlled and real scenarios, showing the feasibility of the proposed system

UAV-mounted GPR for NDT applications

European Radar Conference (EuRAD) (15th. 2018. Madrid)This contribution introduces a novel airborne system for subsurface sensing and imaging applications. The system consists of a Ground Penetrating Radar (GPR) mounted on an Unmanned Aerial Vehicle (UAV). Since the system does not need to be in contact with the soil, it is particularly useful for some Non-Destructive Testing (NDT) applications such as landmine detection or archeological surveys. An overview of the system and some of the first flight tests are shown in this contribution. The results of these flight tests prove the feasibility of the system to detect both metallic and dielectric targets. Furthermore, since the system includes a high-accuracy positioning system, measurements could be coherently combined to improve the radar image resolution

Ingeniería de proyectos de explotación de información para PyMEs

Los proyectos de explotación de información poseen características muy distintas a las de los proyectos de desarrollo de software tradicionales. Las clásicas etapas de análisis, diseño, desarrollo, integración y testeo, no encajan con las etapas naturales de los procesos de desarrollo de este tipo de proyectos. En consecuencia, herramientas de la Ingeniería de Software clásica tales como la ingeniería de requerimientos, los modelos de procesos, los ciclos de vida e incluso los mapas de actividades no son aplicables a este tipo de proyectos. En este contexto, este proyecto busca desarrollar y sistematizar el cuerpo de conocimiento de la Ingeniería de Proyectos de Explotación de Información con focalización en su transferencia a la Industria, particularmente al sector PyMEs. Utilizando las metodologías de investigación documental exploratoria, prototipado evolutivo y casos de estudio se plantea a través de objetivos específicos, el desarrollo de los siguientes artefactos de Ingeniería de Proyectos de Explotación de Información: [a] una batería de técnicas de educción y formalismos de documentación de requerimientos; [b] un modelo de procesos y las métricas asociadas; [c] un modelo de ciclo de vida; y [d] un mapa de actividades.Eje: Base de datos y Minería de datosRed de Universidades con Carreras en Informática (RedUNCI