DSpace Repository :: Browsing by Author "Teniente Vallinas, Jorge"

Browsing by Author "Teniente Vallinas, Jorge"

Now showing 1 - 20 of 75

Open Access
3-D printed horn antennas and components performance for space and telecommunications
(IEEE, 2018) Teniente Vallinas, Jorge; Iriarte Galarregui, Juan Carlos; Caballero Nagore, Rubén; Valcázar Berdofe, Daniel; Goñi, Mikel; Martínez, Aitor; Ingeniería Eléctrica, Electrónica y de Comunicación; Institute of Smart Cities - ISC; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzaren
In this work, a study of the performance of several antennas and components, manufactured using an accurate stereolithography 3D printer and resin for maximum accuracy and detail, is carried out. Electroless plating of the components to cover the pieces with a thick copper layer to improve their mechanical resistance is undertaken. Several SatCom horn antennas and components are designed, manufactured, and tested. A detailed study of a spline horn antenna and a filter is covered. These results are compared to the metallic lathe manufactured versions. Conclusions are derived from these tests, which are useful to improve additive manufactured components in future versions.
Open Access
60 GHz single-layer slot-array antenna fed by groove gap waveguide
(IEEE, 2019) Ferrando Rocher, Miguel; Valero Nogueira, Alejandro; Herranz Herruzo, José I.; Teniente Vallinas, Jorge; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzaren; Institute of Smart Cities - ISC; Ingeniería Eléctrica, Electrónica y de Comunicación
A V-band single-layer low-loss slot-array antenna is presented in this letter. Radiating slots are backed by coaxial cavities, which are fed through a groove gap waveguide E-plane corporate feed network. Cavity resonances are created by shortening nails with respect to the surrounding ones. This fact enables a compact single-layer architecture since coaxial cavities and feeding network can share the same bed of nails. A 16 x 16 array is designed, constructed, and measured to demonstrate the viability of this concept for high-gain single-layer slot-array antennas. In addition, this solution can be extended to circular polarization by seamlessly adding a polarizer above the slots without changing the feeding network piece. Measurements show a relative bandwidth of 10% with input reflection coefficient better than -10 dB and a mean antenna efficiency above 70% within the operating frequency band (57-66 GHz).
Open Access
Advanced feeds for mm-wave antenna systems
(Springer, 2018) Teniente Vallinas, Jorge; Iriarte Galarregui, Juan Carlos; Ederra Urzainqui, Íñigo; Gonzalo García, Ramón; Ingeniería Eléctrica, Electrónica y de Comunicación; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzaren
Millimeter-wave antenna systems have traditionally required high performance feeds in order to fulfill its stringent requirements. Therefore, this goal has been achieved by corrugated horns. However, in the last years new applications mainly in the communication systems have driven the use of other types of antenna feed with slightly reduced performance but simpler manufacturing at mm-wave and submm-wave frequencies with improvements in cost reduction. These advanced profiles are usually based in smooth waveguide advanced profiles. Besides, the chapter describes different feed configurations based on metamaterial structures and several examples of metamaterial based or inspired antennas are considered. Then, this chapter covers the different alternatives currently used for mm-wave antenna feed: corrugated horns, spline horns, and metamaterial horns. At the end of each section, it includes some research successful results.
Open Access
Alimentadores gaussianos en guía de onda rectangular
(1999) Teniente Vallinas, Jorge; Gonzalo García, Ramón; Río Bocio, Carlos del; Ingeniería Eléctrica y Electrónica; Ingeniaritza Elektrikoa eta Elektronikoa
A new and efficient design of a rectangular corrugated waveguide mode converter, from TE10 mode in a smooth rectangular monomode waveguide to HE11 mode in a corrugated rectangular waveguide, is proposed. The main idea is the application of Gaussian design techniques, described in the given references, previously applied in circular waveguides. By using these techniques compact and very efficient components are obtained. The obtained far field pattern is rather good as illuminator of square or rectangular parabolic reflectors, with very low sidelobes and crosspolarisation levels, avoiding the use of a rectangular to circular waveguide converter.
Open Access
All-metallic ε-near-zero (ENZ) lens based on ultra-narrow hollow rectangular waveguides: experimental results
(IEEE, 2014) Orazbayev, Bakhtiyar; Torres Landívar, Víctor; Pacheco-Peña, Víctor; Falcone Lanas, Francisco; Teniente Vallinas, Jorge; Beruete Díaz, Miguel; Sorolla Ayza, Mario; Navarro Cía, Miguel; Engheta, Nader; Ingeniería Eléctrica y Electrónica; Ingeniaritza Elektrikoa eta Elektronikoa; Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa
Here we perform numerical and experimental investigation of plano-concave all-metallic ε-near-zero (ENZ) lens with operational frequency f = 144 GHz. The ENZ lens is achieved by stacking an array of narrow hollow rectangular waveguides working near cut-off frequency. Focusing and radiation properties are numerically analyzed and measured. The enhancement of 5.61 dB and directivity of 17.6 dBi are shown. Good agreement between experimental and numerical results is demonstrated.
Open Access
Antena corrugada con perfil gaussiano de gran ancho de banda
(2001) Teniente Vallinas, Jorge; Gonzalo García, Ramón; Río Bocio, Carlos del; Ingeniería Eléctrica y Electrónica; Ingeniaritza Elektrikoa eta Elektronikoa
En este trabajo se presenta el diseño de una antena de bocina corrugada con más de un 40% de ancho de banda. Los patrones de radiación medidos coinciden muy bien con los simulados. Esta antena se puede usar en aplicaciones que requieran un gran ancho de banda con bajos lóbulos laterales (< -28 dB), baja polarización cruzada (< -30 dB) y con requerimientos en potencia reflejada no demasiado restrictivos (< -15 dB).
Open Access
ASTRA 3B horn antenna design
(2010) Teniente Vallinas, Jorge; Río Bocio, Carlos del; Ingeniería Eléctrica y Electrónica; Ingeniaritza Elektrikoa eta Elektronikoa
The ASTRA 3B satellite includes 60 Ku-band state-of-the- art transponders and 4 Ka-band transponders. The spacecraft have been designed for the distribution of both direct-to-home (DTH) broadcast services and two way broadband services across Europe. After Astra 2B and Astra 1M, Astra 3B is the third Astra satellite to be built by ASTRIUM. Two different horn antennas, for Ku- and Ka-bands, were designed with very stringent requirements as it is usually required for space applications. For the horns the cross-polar levels should be below -45 dB, and the return loss below -30dB for all frequency bands. Normally the horn aperture is fixed by the required illumination of the reflector edges, so it is difficult to reduce the aperture size of a horn antenna. Nevertheless, thanks to the design technique used, the relation between the output aperture and the total horn length for the Ka-band was approximately 0.56 and for the Kuband was something like 0.76. This means that the lengths of the horn antennas are 1.8 and 1.32 times the respective apertures. Furthermore, the taper and the phase center movement inside the respective bandwidths could be controlled and limited to certain limits during the optimization procedure, obtaining a very efficient configuration when they were combined with the reflectors. The horn antennas were based on the combination of horizontal and vertical corrugations and they were designed by the Antenna group of the Public University of Navarra.
Open Access
The Canfranc Axion Detection Experiment (CADEx): search for axions at 90 GHz with Kinetic Inductance Detectors
(IOP Publishing, 2022) Aja, Beatriz; Arguedas Cuendis, Sergio; Arregui Padilla, Iván; Artal, Eduardo; Barreiro, R. Belén; Casas, Francisco J.; Ory, Marina C. de; Díaz-Morcillo, Alejandro; Fuente, Luisa de la; Gallego, Juan Daniel; García-Barceló, José María; Gimeno, Benito; Gómez, Alicia; Granados, Daniel; Kavanagh, Bradley J.; Gómez Laso, Miguel Ángel; Lopetegui Beregaña, José María; Lozano-Guerrero, Antonio José; Magaz, María T.; Martín-Pintado, Jesús; Martínez-González, Enrique; Miralda-Escudé, Jordi; Monzó-Cabrera, Juan; Najarro de la Parra, Francisco; Navarro-Madrid, José R.; Nuñez Chico, Ana B.; Pascual, Juan Pablo; Pelegrin, Jorge; Peña Garay, Carlos; Rodríguez, David; Socuéllamos, Juan M.; Teberio Berdún, Fernando; Teniente Vallinas, Jorge; Vielva, Patricio; Vila, Iván; Vilar, Rocío; Villa, Enrique; Ingeniería Eléctrica, Electrónica y de Comunicación; Institute of Smart Cities - ISC; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzaren
We propose a novel experiment, the Canfranc Axion Detection Experiment (CADEx), to probe dark matter axions with masses in the range 330–460 μeV, within the W-band (80–110 GHz), an unexplored parameter space in the well-motivated dark matter window of Quantum ChromoDynamics (QCD) axions. The experimental design consists of a microwave resonant cavity haloscope in a high static magnetic field coupled to a highly sensitive detecting system based on Kinetic Inductance Detectors via optimized quasi-optics (horns and mirrors). The experiment is in preparation and will be installed in the dilution refrigerator of the Canfranc Underground Laboratory. Sensitivity forecasts for axion detection with CADEx, together with the potential of the experiment to search for dark photons, are presented.
Open Access
Choked-gaussian corrugated horn antenna design small global coverage horn antenna for TT&C with extremely low sidelobe level
(2003) Teniente Vallinas, Jorge; Gonzalo García, Ramón; Río Bocio, Carlos del; Ingeniería Eléctrica y Electrónica; Ingeniaritza Elektrikoa eta Elektronikoa
Extremely low sidelobe horn antennas are often required for the actual technology. This type of horn antennas are important to avoid interference with other systems. In this paper we describe a new design implementing a radical change in the current technology. It consists in attaching together a choked-waveguide antenna with a classical pure gaussian output corrugated horn. A really impressive radiation pattern with very low sidelobes and crosspolar levels in a very short antenna is obtained. This antenna shape was firstly presented in [1]. In this paper an improvement in size, weight, bandwidth and crosspolar level of the design is shown. This improvement has been possible due to the optimisation of the profile by means of the use of a mode matching code (mwave Wizard) instead of a time consuming finite element code.
Open Access
Comparación entre antenas cónicas corrugadas y antenas gaussianas corrugadas
(2002) Teniente Vallinas, Jorge; Gonzalo García, Ramón; Río Bocio, Carlos del; Ingeniería Eléctrica y Electrónica; Ingeniaritza Elektrikoa eta Elektronikoa
In this paper, a study of two equal size corrugated horn antennas; a conical and a gaussian profiled horn antenna (GPHA) has been developed. It will be demonstrated that GPHA´s provide lower sidelobes and wider bandwidths, while conical corrugated horn antennas offer higher directivities for the same aperture. Both type of antennas provide low crosspolar levels.
Open Access
Comparision of Doppler tracking techniques for Starlink satellite signals
(2024) Larráyoz Arrigote, Inés; Teniente Vallinas, Jorge; Escuela Técnica Superior de Ingeniería Industrial, Informática y de Telecomunicación; Industria, Informatika eta Telekomunikazio Ingeniaritzako Goi Mailako Eskola Teknikoa
This project focuses on the study of the use of Starlink constellation signals for Position, Navigation and Timing (PNT) as an alternative to GNSS. A summary about the structure of this type of signals giving a detail explanation about the synchronization symbols from the signals is exposed. The Doppler parameter that affects these signals when they are captured by Earth receivers is analyzed. The objective is to compare different Doppler tracking techniques to determine the quality of the architectures for Doppler compensation. Two architectures are based on well-known Phased-Locked Loop (PLL), but because they track the Doppler from the signals (frequency) they are Frequency-Locked Loop (FLL) having a second and third order close loop. Both architectures can perform the tracking successfully but not filtering the noise as perfectly for low SNR (dB). Also, the third architecture is based on a standard Kalman Filter (KF), recent architectures for signal synchronization that seem to replace the well-established PLL-architectures. Nevertheless, the algorithm developed doesn’t present better results than the FLL’s architectures. To test the tracking performance of the diverse architectures, synthetic signals have been generated. Moreover, two scenarios have been tested: the first one considers AWGN (Additive White Gaussian Noise) in addition to the Doppler effect to generate the synthetic received signals, while the second one also adds PN (Phase Noise). The results show that for the simpler architecture (first order FLL), the Doppler tracking is performing better for both noise scenarios comparing to the other developed techniques.
Open Access
A complete optimization-loop, including feeders, of antenna systems based on reflectors
(IEEE, 2005) Delgado, D.; Teniente Vallinas, Jorge; Río Bocio, Carlos del; Haro, L. de; Martínez, J. A.; Pino, A.G; Ingeniería Eléctrica y Electrónica; Ingeniaritza Elektrikoa eta Elektronikoa
In the design process of a complete antenna system based on reflectors, the feed real performance is usually included once the reflectors have been optimized with an ideal feed. In this paper, the proposal is to include the feed inside the optimization loop of the whole system, by means of a parametric definition of the feeder. To perform the optimization, the parametric feed will be considered as an additional surface, which receives some desired electric field that should be analyzed to properly modify the feed definition parameters in order to reduce the difference between the desired and the new generated field distribution over a planar surface nearby the focal point of the system. At the end of the optimization process, all the elements of the whole antenna system, reflectors and feed, will be totally defined and perfectly coupled.
Open Access
Conical versus gaussian profiled corrugated horn antennas
(IEEE, 2002) Teniente Vallinas, Jorge; Gonzalo García, Ramón; Río Bocio, Carlos del; Ingeniería Eléctrica y Electrónica; Ingeniaritza Elektrikoa eta Elektronikoa
In this paper, a study of two equal size corrugated horn antennas; a conical and a gaussian profiled horn antenna (GPHA) has been developed. It will be demonstrated that GPHA´s provide lower sidelobes and wider bandwidths, while conical corrugated horn antennas offer higher directivities for the same aperture. Both type of antennas provide low crosspolar levels.
Open Access
Corrugated horn antenna noise temperature characterisation for the NRL water vapor millimeter-wave spectrometer project
(2011) Teniente Vallinas, Jorge; Gómez, R.M.; Maestrojuán Biurrun, Itziar; Rebollo Mugueta, Ainara; Gonzalo García, Ramón; Río Bocio, Carlos del; Ingeniería Eléctrica y Electrónica; Ingeniaritza Elektrikoa eta Elektronikoa
In this paper the antenna noise temperature for two different corrugated horn antennas (old model and new model) for NRL WVMS is being characterized. The whole optical system will be simulated with Ticra’s GRASP software, and the corrugated horns with Mician μWave Wizard software. Spherical wave expansion from Mician μWave Wizard will be exported to Ticra’s GRASP to connect both results.
Open Access
Desarrollo de diferentes configuraciones de antenas para un sistema radar
(2018) Royo Romero, Mario; Teniente Vallinas, Jorge; Escuela Técnica Superior de Ingenieros Industriales y de Telecomunicación; Telekomunikazio eta Industria Ingeniarien Goi Mailako Eskola Teknikoa
Este TFG surge con el motivo de mejorar las antenas de un radar a 24 GHz que posee la empresa Anteral S.L. en la cual se ha trabajado en su realización durante 4 meses. El radar que posee Anteral dispone de una antena trasmisora y otra receptora (ambas son idénticas) la cual es un Array de 16 elementos en configuración 4x4 en los que la alimentación es uniforme. Esta alimentación uniforme consigue la mayor directividad posible pero los lóbulos laterales de dicha configuración son también bastante altos de tal manera que el radar se ve perjudicado por objetos cercanos al blanco que se quiere detectar ya que sus niveles de rebote son similares al objeto a detectar. De aquí surge la idea principal para este trabajo. Conseguir un reparto de corriente distinto para los parches que forman la antena y con ello conseguir disminuir los lóbulos laterales de la antena que forma el radar.
Open Access
Desarrollo del software de control de los sistemas de posicionamiento de precisión para medida de antenas en milimétricas y submilimétricas
(2015) Goñi Esparza, Mikel; Teniente Vallinas, Jorge; Iriarte Galarregui, Juan Carlos; Escuela Técnica Superior de Ingenieros Industriales y de Telecomunicación; Telekomunikazio eta Industria Ingeniarien Goi Mailako Eskola Teknikoa
Este proyecto se centra en evaluar el rendimiento de un sistema de medida y posicionamiento de precisión para antenas, con el objetivo de mejorar el software actual programado en LabVIEW que lo controla. Se ha estudiado el funcionamiento del software actual y se han llevado a cabo mejoras y nuevas funcionalidades que permiten obtener unos resultados más exactos y una mayor comodidad a la hora de medir los diagramas de radiación. Para ello, se han desarrollado distintas versiones del software en función de dónde se ejecute (PC o analizador), del tipo de barrido a realizar, así como del número de parámetros y de la precisión de los mismos que se desee obtener. Se han realizado medidas de antenas en distintas bandas frecuenciales probando el código en diversas situaciones de medida. Los resultados obtenidos se han procesado con la herramienta software Matlab, y se han extraído conclusiones de gran relevancia gracias a las representaciones de los diagramas. Además, durante el transcurso del trabajo han surgido ciertos problemas y obstáculos derivados tanto de la programación como de la propia estructura de posicionamiento. Este hecho ha provocado que algunos de los razonamientos iniciales hayan tenido que modificarse
Open Access
Design and characterization of terahertz CORPS beam forming networks
(Springer, 2023) Biurrun Quel, Carlos; Haddad, Thomas; Sievert, Benedikt; Kress, Robin; Weimann, Nils; Erni, Daniel; Rennings, Andreas; Stöhr, Andreas; Teniente Vallinas, Jorge; Río Bocio, Carlos del; Ingeniería Eléctrica, Electrónica y de Comunicación; Institute of Smart Cities - ISC; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzaren; Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa
This work reviews the design and applicability of beam-forming networks based on Coherently Radiating Periodic Structures (CORPS-BFN) at Terahertz (THz) frequency bands. These versatile networks offer two operation modes: a continuous beam steering – feeding an antenna array with a linearly progressive phase distribution – using a reduced number of phase controls; or a multi-beam operation, generating independent, overlapped beams. These networks are built upon the concatenation of power combiners/dividers (PCDs) with isolated outputs. The isolation is provided by monolithically integrated resistors, implemented with Ti/TiO thin films for the first time. In this work, a planar prototype of a (inputs/outputs) microstrip CORPS-BFN for operation in the WR3.4/WM-864 band (220–330 GHz) on a thin 50 m Indium Phosphide (InP) substrate is designed, fabricated, and characterized. The measured S-parameters show a reflection coefficient better than -15 dB and an insertion loss between 1.6 and 3.2 dB in the whole band. In addition, an isolation better than 20 dB between the input ports has been measured. An overall remarkable agreement is observed between the measurements and the simulations. Last, the applications, scalability and efficiency of this type of networks at the targeted band are discussed in detail.
Open Access
Design of quad band X/Ka coaxial horn antenna and feed chain for satellite communications
(2016) Gómez López, Iker; Teniente Vallinas, Jorge; Escuela Técnica Superior de Ingenieros Industriales y de Telecomunicación; Telekomunikazio eta Industria Ingeniarien Goi Mailako Eskola Teknikoa
En este Trabajo Fin de Grado se presenta el proceso de diseño, simulación y optimización de un sistema de comunicaciones por satélite que trabaja simultáneamente en las bandas frecuenciales X y Ka con doble polarización lineal. La solución que se propone está destinada a la nueva generación de sistemas satelitales, y está compuesta por una antena de bocina corrugada coaxial que implementa corrugaciones axiales y radiales junto a un sistema de alimentación compuesto por un OMTJ coaxial y cuatro ramas de guía de onda rectangular precedido por un compacto polarizador OMT en las entradas de cada una de las bandas para permitir disponer de doble polarización lineal. En la parte interior de la bocina corrugada se encuentra una antena spline muy compacta específicamente diseñada para permitir que el sistema trabaje simultáneamente en ambas bandas frecuenciales, haciendo el sistema ideal para aplicaciones satelitales. El diseño se presenta junto a un largo proceso de optimización de todo el conjunto, procedimiento no recogido en la literatura hasta la fecha en este tipo de estructuras y que permite obtener unas mejores prestaciones.
Open Access
Design, optimization and manufacture modelling of reflector-based higy-performance antenna systems
(2017) Valcázar Berdofe, Daniel; Teniente Vallinas, Jorge; Escuela Técnica Superior de Ingenieros Industriales y de Telecomunicación; Telekomunikazio eta Industria Ingeniarien Goi Mailako Eskola Teknikoa
This work deals with the creation of two parabolic reflector systems, one single offset reflector centered at 275 GHz and one dual Cassegrain reflector at 340 GHz. Based on a set of initial specifications, both systems are electrically designed using a combination of specialized software programs (including HFSS, μWave Wizard and GRASP), after which the manufacturing models are created taking the pertinent precautions into account. Once the manufactured models are received (machined by a third party), they are measured in Near-Field to verify their correct operation, using transformation techniques (with custom MATLAB scripts) to compute their Far-Field performances and compare them to the simulated design results. To understand the operation of these types of systems, a theoretical overview of parabolic reflector antennas is presented, as well as conclusions about the finished systems and possible investigative lines and advancements to pursue in the future.
Open Access
Development of new passive technologies for millimetre wave and terahertz systems
(2023) Biurrun Quel, Carlos; Río Bocio, Carlos del; Teniente Vallinas, Jorge; Ingeniería Eléctrica, Electrónica y de Comunicación; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzaren; Gobierno de Navarra / Nafarroako Gobernua
Esta Tesis Doctoral aborda el desarrollo de nuevas tecnologías pasivas para su implementación a altas frecuencias, concretamente en la región de las ondas milimétricas (mmWave) y del Terahercio (THz) – hasta 300 GHz – con el objetivo de mejorar las prestaciones y eficiencia de dichos sistemas. Este objetivo se aborda desde tres puntos distintos: la integración de fuentes de alta frecuencias, la propagación no-radiada de las señales generadas por dichas fuentes, y la radiación de las mismas y el control de dicha radiación. El enfoque original de la Tesis, reflejado en la primera parte de la misma, pasa por la integración de fotodiodos uni-travelling carrier (UTC-PD) en módulos con salida en guía de onda rectangular. Con este objetivo en mente, se han propuesto dos diseños de transición a guía de onda, uno de ellos sirviendo simultáneamente como combinador de potencia. Estos diseños han sido elaborados en base a la premisa fundamental de adaptar la impedancia compleja de los fotodiodos. La segunda parte de esta Tesis aborda la concepción, desarrollo y validación de una nueva tecnología de línea de transmisión para altas frecuencias, acuñada como Gap Coplanar Waveguide, la cual permite prevenir la propagación de modos de sustrato, así como reducir las pérdidas debidas a los materiales dieléctricos empleados en la línea. Finalmente, la tercera parte de esta Tesis rescata el concepto de las redes de conformado de haz basadas en estructuras periódicas de radiación coherente (CORPS-BFN), un tipo de redes desarrolladas por nuestro grupo hace casi dos décadas. El objetivo de esta Tesis para con este tipo de redes ha sido el estudio de su viabilidad en sistemas de Terahercios, algo que se ha validado experimentalmente con la fabricación de un prototipo a 300 GHz y la demostración de la capacidad de controlar la dirección de radiación de un arreglo de antenas alimentado por este tipo de redes en un entorno 2D.