Listar GI-GTEC - Artigos por autor "Moreno Piquero, E."
Mostrando ítems 1-16 de 16
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An Experimental Set-Up for Measurement of the Power Absorbed from 900 MHz GSM Standing Waves by Small Animals, Illustrated by Application to Picrotoxin-Treated Rats
López Martín, E.; Brégains, Julio; Jorge Barreiro, F. Javier; Sebastián Franco, José Luis; Moreno Piquero, E.; Ares Pena, F. J. (Electromagnetics Academy, 2008)[Abstract] We describe an experimental set-up for exposure of small animals to radiofrequency standing waves that allows direct measurement of the power absorbed by the animal. Essentially, the set-up consists of a metallic ... -
Application of Time Modulation in the Synthesis of Sum and Difference Patterns by Using Linear Arrays
Fondevila, J.; Brégains, Julio; Ares Pena, F. J.; Moreno Piquero, E. (John Wiley & Sons, Inc., 2006-05)[Abstract] In this paper, time modulation is applied to a small number of elements of a linear array that radiates either sum or difference patterns, in order to take control over their sidelobe levels. The simulated ... -
Calculating Directivities with the Two-Dimensional Simpson's Rule
Brégains, Julio; Coleman, I. C.; Ares Pena, F. J.; Moreno Piquero, E. (Institute of Electrical and Electronics Engineers, 2004-08)[Abstract] C++ routines implementing the simple generalization of Simpson's rule to two dimensions for calculating antenna directivities compare well with methods currently available in common symbolic and numerical ... -
Effects of Measurement Distance on Measurements of Symmetrically Shaped Patterns Generated by Line Sources
Brégains, Julio; Ares Pena, F. J.; Moreno Piquero, E. (Institute of Electrical and Electronics Engineers, 2003-02)[Abstract] Symmetrically shaped patterns, generated by real continuous linear apertures derived from Taylor distributions, resemble Taylor sum patterns in regard to the distance-dependence of their sidelobe heights. Their ... -
Matrix Pseudo-Inversion Technique for Diagnostics of Planar Arrays
Brégains, Julio; Ares Pena, F. J.; Moreno Piquero, E. (The Institution of Engineering and Technology, 2005-01-06)[Abstract] It is shown, by means of numerical simulation, that the Moore-Penrose pseudoinverse of a matrix taken from an overdetermined system can be applied to retrieve the excitation distribution of a planar array of ... -
Measurement Effects on Ø-Symmetric Shaped Patterns Generated by Circular Continuous Apertures
Brégains, Julio; Ares Pena, F. J.; Moreno Piquero, E. (Institute of Electrical and Electronics Engineers, 2003-10)[Abstract] Sidelobe-level and ripple behaviors of Ø-symmetric shaped patterns, generated by circular, real and complex, continuous Taylor distributions, is analyzed as a function of measurement distances. This paper reveals ... -
Near Field Quasi-Null Control with Far Field Sidelobe Level Maintenance in Line Source Difference Patterns
Brégains, Julio; Ares Pena, F. J.; Moreno Piquero, E. (Taylor & Francis, 2003)[Abstract] A previously developed method to place a quasi-null in a specified angular position of the near-field line source in sum patterns while, simultaneously, the far-field sidelobe level is maintained under a desired ... -
Near-Field Quasi-Null Control with Far-Field Sidelobe Level Maintenance in Line Source Distributions
Brégains, Julio; Ares Pena, F. J.; Moreno Piquero, E. (The Institution of Engineering and Technology, 2002-06-06)[Abstract] An improving method, based on the Taylor line source, that allocates a quasi-null in a specified angular position of near-field pattern, and simultaneously controls the general topography of the far-field sidelobe ... -
On the Multiplicity of Solutions of Taylor Linear Sources Generating Symmetrical Power Patterns with Filled Nulls
Brégains, Julio; Rodríguez, J. A.; Ares Pena, F. J.; Moreno Piquero, E. (Institute of Electrical and Electronics Engineers, 2004-12)[Abstract] As expressed in earlier works, if filled nulls are required in a power pattern generated by a Taylor line source, their corresponding roots must be complex. This leads to a multiplicity of solutions emerged from ... -
Optimal Synthesis Of Circular Apertures Based On Ludwig Distributions
Brégains, Julio; Rodríguez, J. A.; Ares Pena, F. J.; Moreno Piquero, E. (Taylor & Francis, 2003-01)[Abstract] Ludwig distributions are a generalization of circular Taylor distributions that generate radiation patterns with wide-angle side lobe levels decaying faster than for Taylor patterns. In this paper we show that ... -
Optimal Synthesis of Line Source Antennas Based On Rhodes Distributions
Brégains, Julio; Rodríguez, J. A.; Ares Pena, F. J.; Moreno Piquero, E. (Taylor & Francis, 2002)[Abstract] In this paper we show that by means of an appropriate optimization technique the zeros of Rhodes radiation patterns can be perturbed so as to improve or modify pattern and/or the aperture distribution characteristics ... -
Optimizing Uniformly Excited Linear Arrays through Time Modulation
Fondevila, J.; Brégains, Julio; Ares Pena, F. J.; Moreno Piquero, E. (Institute of Electrical and Electronics Engineers, 2004-12)[Abstract] The letter shows that, by the proper use of time modulation in equispaced linear arrays with uniform excitation distribution, it is possible to maintain the sidelobe zone of the radiated power below a certain - ... -
Synthesis of Multiple-Pattern Planar Antenna Arrays with Single Prefixed or Jointly Optimized Amplitude Distributions
Brégains, Julio; Trastoy, A.; Ares Pena, F. J.; Moreno Piquero, E. (John Wiley & Sons, Inc., 2002-01-05)[Abstract] Previous work on the generation of multiple radiation patterns by a single linear array antenna with an unchanging excitation amplitude distribution is generalized to planar arrays. The amplitude distribution ... -
Variation in The Bandwidths of Pattern-Quality Parameters and Maximum Embedded Impedance among the Solutions to Shaped-Beam Synthesis Problems for Collinear Dipole Arrays
Brégains, Julio; Ares Pena, F. J.; Moreno Piquero, E. (Institute of Electrical and Electronics Engineers, 2003)[Abstract] We investigated variation in the bandwidths of ripple, sidelobe level, -3 dB beamwidth, and maximum element embedded (active) impedance (|Z/sup e/|/sub max/) among multiple collinear dipole arrays radiating a ... -
Very Fast Method to Synthesise Conformal Arrays
Fondevila, J.; Rodríguez, J. A.; Brégains, Julio; Moreno Piquero, E.; Ares Pena, F. J. (The Institution of Engineering and Technology, 2007-08-02)[Abstract] A very fast technique that allows the synthesising of arbitrary footprint patterns by using conformal arrays with many radiating elements is described. This method is based on a combination of Woodward-Lawson ... -
Visualizing the 3D Polar Power Patterns and Excitations of Planar Arrays with Matlab
Brégains, Julio; Ares Pena, F. J.; Moreno Piquero, E. (Institute of Electrical and Electronics Engineers, 2004-04)[Abstrac] This paper discusses the use of Matlab to create three-dimensional polar plots of the power patterns of planar arrays together with 3D plots of the amplitudes and phases of their excitations. A few lines of Matlab ...