Exploració per tema "Ones electromagnètiques"
Ara es mostren els items 1-20 de 101
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5G Evaluation platform for connected and autonomous vehicles
(Universitat Politècnica de Catalunya, 2021-10-25)
Treball Final de Grau
Accés obertLa nueva generación de comunicaciones móviles, es decir, 5G, promete una capacidad sin precedentes, vínculos y flexibilidad para admitir una amplia variedad de casos de uso. Se espera que la mejora en rendimiento en términos ... -
A high-performance electromagnetic vibration energy harvester based on ring magnets with Halbach configuration
(Elsevier, 2022-12-01)
Article
Accés obertThis paper proposes and studies a ring-shaped architecture with Halbach configuration for electromagnetic vibration energy harvesters. The proposed transducer consists of three ring magnets with a linear Halbach array that ... -
A procedure to design wide-band electromagnetically-coupled stacked microstrip antennas based on a simple network model
(Institute of Electrical and Electronics Engineers (IEEE), 1999)
Text en actes de congrés
Accés restringit per política de l'editorialIt is well known that microstrip patch antennas have a poor bandwidth due to the small spacing between the patch and the ground plane. A stacked patch configuration has been demonstrated experimentally as a feasible solution, ... -
ABSense: sensing electromagnetic waves on metasurfaces via ambient compilation of full absorption
(Association for Computing Machinery (ACM), 2019)
Text en actes de congrés
Accés obertMetasurfaces (MS) constitute effective media for manipulating and transforming impinging EM waves. Related studies have explored a series of impactful MS capabilities and applications in areas such as wireless communications, ... -
Active control of Alfvén eigenmodes inmagnetically confined toroidal plasmas
(IOP Publishing, 2019-03)
Article
Accés obertAlfvén waves are electromagnetic perturbations inherent to magnetized plasmas that can be driven unstable by a free energy associated with gradients in the energetic particles' distribution function. The energetic particles ... -
Aliasing of the Schumann resonance background signal by sprite-associated Q-bursts
(2017-12)
Article
Accés obertThe Earth's naturally occurring Schumann resonances (SR) are composed of a quasi-continuous background component and a larger-amplitude, short-duration transient component, otherwise called ‘Q-burst’ (Ogawa et al., 1967). ... -
Anomalies study in VTEC from SMOS data
(Universitat Politècnica de Catalunya, 2023-07-06)
Treball Final de Grau
Accés obertThe main goal is to analyze the SMOS measurements and determine if there is any sign on them that could determine the possible effects of these natural phenomena on the ionosphere. -
BEXUS30 – ELFI: Measuring Schumann resonances in the atmosphere
(Universitat Politècnica de Catalunya, 2022-04-29)
Comunicació de congrés
Accés obertThe ELFI project was one of nine BEXUS experiments carried in two stratospheric balloons in 2021. The aim of the experiment was to develop a system for the non-stationary measurement of electromagnetic waves in the extremely ... -
Caracterització optoelectrònica del grafè a altes freqüències i anàlisi dels efectes produïts en el grafè degut a diferents substrats
(Universitat Politècnica de Catalunya, 2015-07-22)
Projecte/Treball Final de Carrera
Accés obertThis project represents the continuation of the previous study about the analysis graphene optical and electronic properties over a wide frequency range: terahertz, near-infrared, visible band and near-ultraviolet. In this ... -
Compression of the MoM matrix using macrobasis functions with a full-controlable accuracy
(EurAPP, 2009)
Text en actes de congrés
Accés obertA new accuracy-controlable method for compressing the MoM impedance matrix of an electromagnetic problem based on a basis change plus a truncation with a threshold is presented here. The idea is to switch to singular basis ... -
Computational Techniques for LED Optical Microcavities
(Universitat Politècnica de Catalunya, 2015-06-03)
Projecte/Treball Final de Carrera
Accés restringit per acord de confidencialitat -
COMSOL Simulation for Adaptive Massive MIMO Systems in the Terahertz Band
(Universitat Politècnica de Catalunya, 2014-12-19)
Projecte/Treball Final de Carrera
Accés obert
Realitzat a/amb: Georgia Institute of Technology[ANGLÈS] The communications in the Terahertz Band (0.06-10 THz) are a promising new paradigm for wireless communications in the next decade. Their large available bandwidth, combined with the development of graphene antennas, ... -
Contact-Free Measurement of Cardiac and Respiratory Activities by Using Thermal Imaging
(Universitat Politècnica de Catalunya, 2014-04-15)
Projecte/Treball Final de Carrera
Accés obert
Realitzat a/amb: Rheinisch-Westfälische Technische Hochschule Aachen[ANGLÈS] Motivation: Real time measurements of respiratory and heart rates are crucial in neonatal intensive care units. The actual technology is based on contact methods that require close-proximity sensing and subject’s ... -
Cylindrical geometry: a further step in active microwave tomography
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1991-05-01)
Article
Accés obertA prototype imaging system for active microwave tomography using cylindrical geometry has been developed, making it possible to obtain images of the dielectric properties of biological targets at 2.45 GHz. This configuration ... -
Database of "in vivo" measurements for quantitative microwave imaging and reconstruction algorithms available
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1995-10-01)
Article
Accés obertReconstruction algorithms and equipment have been developed for microwave imaging, with emphasis on noninvasive control of deep hyperthermia treatments. Tomographic reconstruction algorithms have also been developed for ... -
Debye frequency-extended waveguide permittivity extraction for high complex permittivity materials. Concrete setting process characterization
(2019-12)
Article
Accés obertA waveguide with central frequency 868 MHz is used in transmission/reflection operation regime to accurately measure the behaviour of the complex permittivity of high complex permittivity granular materials and it has been ... -
Desarrollo de un cabezal de microondas para a detección de frecuencia Doppler
(Universitat Politècnica de Catalunya, 2010-10)
Projecte/Treball Final de Carrera
Accés obertEste proyecto tiene como finalidad realizar un prototipo de un radar implementado como un cabezal de microondas que pueda detectar frecuencia Doppler a 10,525 GHz en una placa de Microstrip con un sustrato de la empresa ... -
Design of a leaky-wave antenna based on Goubau line for imaging applications
(Universitat Politècnica de Catalunya, 2022-07-05)
Treball Final de Grau
Accés obertEn ingeniería de antenas, uno de los aspectos más apreciados es la capacidad de apuntar el haz principal electrónicamente. Una de las técnicas más ampliamente usadas para conseguirlo es el escaneo mediante agrupaciones de ... -
Detección por microondas de una única micropartícula
(Universitat Politècnica de Catalunya, 2021-07-08)
Treball Final de Grau
Accés obertProject carried out at the MicroCommFlow Lab which is a group specialized in interaction with microorganisms. We need to interact with the living world and most of the time this is done applying some kind of physical ... -
Diagnóstico de arrays. Estudio comparativo entre campo próximo rectangular y cilíndrico
(Unión Científica Internacional de Radio (URSI), 1990)
Text en actes de congrés
Accés obert