Listar Comunicaciones y ponencias de congresos DIEE - IEES Biltzarretako komunikazioak eta txostenak por título
Mostrando ítems 35-54 de 191
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A complete optimization-loop, including feeders, of antenna systems based on reflectors
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 ... -
Comportamiento de propagacion electromagnetica en el apilamiento de agujeros sublambda y agujeros propagantes
In this work, we provide more insight on the physics underlying the transmission through subwavelength hole arrays metaprism by comparing it with propagating hole arrays prism. We show the critical role that the size ... -
Computation of greatest common divisor for the blind deconvolution of transient impulsive signals
We propose a new blind deconvolution method for transient impulsive signals in a single input – multiple output (SIMO) system. The method exploits the data redundancy inherent to SIMO multichannel systems to obtain an ... -
Conical versus gaussian profiled corrugated horn antennas
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 ... -
Consideraciones de paraxialidad en modos gaussianos de orden superior
Usually, the gaussian beam modes are assumed to be solutions of the wave equation in the free space. Nevertheless, these modes are obtained supposing some paraxial restrictions. Therefore, we will have to check if our ... -
Control strategy for an integrated photovoltaic-battery system
In photovoltaic-battery systems, more attention is usually paid to the MPPT control while the battery management is put aside. This paper proposes two control strategies for an integrated PV-battery system, both of them ... -
Cooperative detection applied to THz imaging cameras
THz technology for developing imaging systems has recently aroused great interest, mainly due to the large number of applications in which these frequencies can be used: security, vision in hard environments, etc. The ... -
Corrugated horn antenna noise temperature characterisation for the NRL water vapor millimeter-wave spectrometer project
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, ... -
Desfasadores para microstrip empleando metamateriales
In this paper an application of LH materials at microwave frequencies (10GHz) is presented. A compact quarter-wave impedance transformer is proposed using alternating sections of left handed media (LHM) and conventional ... -
Design of a multifrequency antenna array with the use of left-handed superstrates
In this paper, the radiation performances of different antenna configuration based on Left-Handed superstrates are presented. First of all, the behaviour of a Left- Handed (LH) unit cell is analysed, showing a resonant ... -
Design of a planar meta-surface based on dipoles and wires for antenna applications
In this paper, the design of a planar meta-surface based on dipoles and wires is presented. The unit cell is formed by three independent layers, which contain two parallel dipoles and one wire. The behaviour of these ... -
Design of low-cost smart accelerometers
The goal of this project is to design a low-cost smart accelerometer, making use of a piezoelectric element as basic sensing material, and adding a mixed-mode conditioning circuit. -
Design of multi-layered radiative cooling structures using evolutionary algorithms
In this work we present a novel way to design thinfilm radiative cooling metamaterials based on genetic algorithms. Three simulations with different design constraints have been done, resulting in three structures that ... -
Designing antenna systems with CORPS (coherently radiating periodic structures)
In this paper a new philosophy to design antenna systems is presented. It is based on the recently proposed Coherently Radiating Periodic Structures (CORPS). These structures are essentially a periodic structure which ... -
Designing feeding networks with CORPS: coherently radiating periodic structures
The design of feeding networks in phased array systems results tricky since all the complex excitations should be provided to all the radiating elements of the system. Where the number of radiating elements increases the ... -
Detection of ethanol in human breath using optical fiber long period grating coated with metal-organic frameworks
An optical fiber sensor for ethanol detection in exhaled breath has been developed. It has been fabricated by functionalizing a Long Period Grating with a metal-organic framework, ZIF-8. The sensor’s response was tested ... -
Detrimental effects in Brillouin distributed sensors caused by EDFA transient
We investigate the deleterious effect and the error in Brillouin optical time-domain analyzers induced by the combination of a low extinction ratio pulse generation with the transient behavior of erbium-doped fiber amplifiers. -
Dipolos y metamateriales: mejora de las características de radiación
In this work, pass band properties of Left Handed Media (LHM) are demonstrated. These properties have been used in order to make a LHM super-substrate that is put over a dipole antenna. This super-substrate is going to ... -
Discrete lenses for multibeam applications
The capability of having many different beams illuminating the earth surface from a geostationary satellite has been an issue of interest during the last few years. The need of increasing the services provided ...