Data

NameMesa Ledesma, Francisco Luis
DepartmentFísica Aplicada I
Knowledge areaFísica Aplicada
Professional categoryCatedrático de Universidad
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  Statistics

  • Items

    85

  • Visits

    5460

  • Downloads

    7735

  Publications

 

Article
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Planar Resonant Blazed Gratings from a Circuit Model Standpoint

Molero, Carlos; Rodríguez Berral, Raúl; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco; Memarian, Mohammad; Itoh, Tatsuo (Institute of Electrical and Electronics Engineers, 2020-01-01)
The equivalent circuit approach (ECA) is used in this work to analyze and design a previously proposed one-dimensional ...
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Wave Propagation in Periodic Metallic Structures with Equilateral Triangular Holes

Alex Amor, Antonio; Valerio, Guido; Ghasemifard, Fatemeh; Mesa Ledesma, Francisco Luis; Padilla, Pablo; Fernández González, José M.; Quevedo Teruel, Óscar (MDPI, 2020-01-01)
This paper studies wave propagation in a periodic parallel-plate waveguide with equilateral triangular holes. A mode-matching ...
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Dispersion Analysis of Periodically Loaded Transmission Lines with Twist Symmetry Using the Mode-Matching Technique

Zetterstrom, Oskar; Valerio, Guido; Mesa Ledesma, Francisco Luis; Ghasemifard, Fatemeh; Norgren, Martin; Quevedo Teruel, Óscar (MDPI, 2020-01-01)
A mode-matching formulation is presented and used to analyze the dispersion properties of twist-symmetric transmission ...
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On the Computation of the Dispersion Diagram of Symmetric One-Dimensionally Periodic Structures

Mesa Ledesma, Francisco Luis; Rodríguez Berral, Raúl; Medina Mena, Francisco (MDPI, 2018-08-01)
A critical discussion on the computation of the dispersion diagram of electromagnetic guiding/radiating structures with ...
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Physically-insightful equivalent circuit models for electromagnetic periodic structures

Mesa Ledesma, Francisco Luis; Rodríguez Berral, Raúl; Medina Mena, Francisco (IOP Publishing Ltd., 2018-01-01)
In this presentation it will be discussed how to obtain analytical or quasi-analytical equivalent circuits to deal with ...
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Resonant Modes of a Waveguide Iris Discontinuity: Interpretation in Terms of Canonical Circuits

Rodríguez Berral, Raúl; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco (Institute of Electrical and Electronics Engineers, 2018-01-01)
This paper presents an eigenproblem for computing the resonances of multiresonant irislike discontinuities in waveguides. ...
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Unlocking Complexity Using the ECA: The Equivalent Circuit Model as An Efficient and Physically Insightful Tool for Microwave Engineering

Mesa Ledesma, Francisco Luis; Rodríguez Berral, Raúl; Medina Mena, Francisco (IEEE Computer Society, 2018-01-01)
In the study of electromagnetic wave propagation and scattering, researchers have always faced the dichotomy of dealing ...
PhD Thesis
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Circuit modeling of periodic structures

Mesa Ledesma, Francisco Luis; Rodríguez Berral, Raúl; Molero Jiménez, Carlos (2017-02-06)
In the present dissertation the main goal consists in the derivation of analytical circuit models for di_erent types of ...
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Wideband analytical equivalent circuit for coupled asymmetrical nonaligned slit arrays

Molero Jiménez, Carlos; Rodríguez Berral, Raúl; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco (American Physical Society, 2017-01-01)
Microstructured metallic devices have been extensively studied because of their interesting properties for controlling the ...
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Annular apertures in metallic screens as extraordinary transmission and frequency selective surface structures

Rodríguez Ulibarri, Pablo; Navarro Cía, Miguel; Rodríguez Berral, Raúl; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco; Beruete, Miguel (Institute of Electrical and Electronics Engineers, 2017-01-01)
A 2-D periodic array of annular apertures (or ring slots) is studied using an accurate circuit model. The model accounts ...
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Differential Lines for Common-Mode Suppression Based in Hybrid Microstrip/CPW Technology

Martel Villagrán, Jesús; Fernández Prieto, Armando; Lujambio, Aintzane; Medina Mena, Francisco; Mesa Ledesma, Francisco Luis; Rodríguez Boix, Rafael (Institute of Electrical and Electronics Engineers, 2017-01-01)
A symmetrical pair of differential microstrip lines implemented in hybrid microstrip/coplanar waveguide (CPW) technology ...
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Wideband analytical equivalent circuit for one-dimensional periodic stacked arrays

Molero Jiménez, Carlos; Rodríguez Berral, Raúl; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco; Yakovlev, Alexander B. (American Physical Society, 2016-01-01)
A wideband equivalent circuit is proposed for the accurate analysis of scattering from a set of stacked slit gratings ...
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Making metals transparent: A circuit model approach

Molero Jiménez, Carlos; Medina Mena, Francisco; Rodríguez Berral, Raúl; Mesa Ledesma, Francisco Luis (The Optical Society, 2016-01-01)
Solid metal films are well known to be opaque to electromagnetic waves over a wide frequency range, from low frequency to ...
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Simplified Modal Expansion to Analyze Frequency-Selective Surfaces: An Equivalent Circuit Approach

Mesa Ledesma, Francisco Luis; Rodríguez Berral, Raúl; García Vigueras, María; Medina Mena, Francisco; Mosig, Juan Ramón (Institute of Electrical and Electronics Engineers, 2016-01-01)
This communication extends a previously reported analytical circuit that models the plane wave scattering by 2-D arrays ...
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Dynamical Equivalent Circuit for 1-D Periodic Compound Gratings

Molero Jiménez, Carlos; Rodríguez Berral, Raúl; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco (Institute of Electrical and Electronics Engineers, 2016-01-01)
Metallic compound gratings are studied in this work by means of an analytical equivalent circuit approach in order to ...
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Excitation of Discrete and Continuous Spectrum in Subdiffraction Wire-Medium Type Lenses

Mesa Ledesma, Francisco Luis; Forouzmand, Ali; Yakovlev, Alexander B.; Hanson, George W.; Rodríguez Berral, Raúl; Medina Mena, Francisco (Institute of Electrical and Electronics Engineers, 2016-01-01)
Subwavelength imaging of the near field of a magnetic line-source excitation is studied for several wire-medium (WM) lens ...
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Accurate circuit modeling of fishnet structures for negative-index-medium applications

Torres, Víctor; Mesa Ledesma, Francisco Luis; Navarro Cía, Miguel; Rodríguez Berral, Raúl; Beruete, Miguel; Medina Mena, Francisco (Institute of Electrical and Electronics Engineers, 2016-01-01)
Metallic plates with a two-dimensional (2D) periodic distribution of sub-wavelength apertures are known to exhibit ...
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Analytical Multimodal Network Approach for 2-D Arrays of Planar Patches/Apertures Embedded in a Layered Medium

Rodríguez Berral, Raúl; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco (Institute of Electrical and Electronics Engineers, 2015-01-01)
A fully analytical multimodal equivalent circuit is presented for the modeling of the scattering of an obliquely incident ...
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Simple and compact balanced bandpass filters based on magnetically coupled resonators

Fernández Prieto, Armando; Lujambio, Aintzane; Martel Villagrán, Jesús; Medina Mena, Francisco; Mesa Ledesma, Francisco Luis; Rodríguez Boix, Rafael (Institute of Electrical and Electronics Engineers, 2015-01-01)
A simple strategy is proposed to design differential-mode bandpass filters with good common-mode (CM) rejection using ...
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Modeling of Nonresonant Longitudinal and Inclined Slots for Resonance Tuning in ENZ Waveguide Structures

Vojnović, Nebojša; Jokanovic, Branka; Radovanović, Miloš; Medina Mena, Francisco; Mesa Ledesma, Francisco Luis (Institute of Electrical and Electronics Engineers, 2015-01-01)
Novel methods are presented for the independent resonance tuning in rectangular waveguide epsilon-near-zero (ENZ) structures. ...
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Non-uniform sinusoidally modulated half-mode leaky-wave lines for near-field focusing pattern synthesis

Martínez Ros, Alejandro Javier; Gómez Tornero, José Luis; Losada Torres, Vicente; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco (Institute of Electrical and Electronics Engineers, 2015-01-01)
A novel non-uniform sinusoidally modulated half-mode microstrip structure with application to near-field focused leaky-wave ...
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Compact balanced FSIR bandpass filter modified for enhancing common-mode suppression

Fernández Prieto, Armando; Martel Villagrán, Jesús; Medina Mena, Francisco; Mesa Ledesma, Francisco Luis; Rodríguez Boix, Rafael (Institute of Electrical and Electronics Engineers, 2015-01-01)
A novel balanced bandpass filter (BPF) based on folded stepped impedance resonators (FSIR's) with modified ground plane ...
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Effects of inter-resonator coupling in split ring resonator loaded metamaterial transmission lines

Naqui, Jordi; Fernández Prieto, Armando; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco; Martín, F. (American Institute of Physics, 2014-01-01)
This paper investigates the effects of inter-resonator coupling in metamaterial transmission lines loaded with split ring ...
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Enhanced modelling of split-ring resonators couplings in printed circuits

Bojanić, Radovan; Milošević, Vojislav; Jokanovic, Branka; Medina Mena, Francisco; Mesa Ledesma, Francisco Luis (Institute of Electrical and Electronics Engineers, 2014-01-01)
An enhanced equivalent circuit approach for the magnetic/electric interaction of single split-ring resonators (SRRs) with ...
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Analytical circuit model for 1-D periodic T-shaped corrugated surfaces

Molero Jiménez, Carlos; Rodríguez Berral, Raúl; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco (Institute of Electrical and Electronics Engineers, 2014-01-01)
An analytical circuit model is obtained to study the reflection of TM polarized electromagnetic waves that impinge obliquely ...
Presentation
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Analytical circuit model for stacked slit gratings

Molero, Carlos; Rodríguez Berral, Raúl; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco; Yakovlev, Alexander B. (Institute of Electrical and Electronics Engineers, 2014-01-01)
This work presents a rigorous circuit model to compute the transmission/reflection properties of a finite number of stacked ...
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Dual capacitive-inductive nature of periodic graphene patches: Transmission characteristics at low-terahertz frequencies

Padooru, Yashwanth R.; Yakovlev, Alexander B.; Kaipa, Chandra S. R.; Hanson, George W.; Medina Mena, Francisco; Mesa Ledesma, Francisco Luis (American Physical Society, 2013-01-01)
We report on the dual nature (capacitive and inductive) of the surface impedance of periodic graphene patches at low-terahertz ...
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Dual-band differential filter using broad-band common-mode rejection artificial transmission line

Mesa Ledesma, Francisco Luis; Qian, Shilong; Hong, Jia-Sheng; Naqui, Jordi; Martín, Ferrán; Fernández Prieto, Armando; Medina Mena, Francisco; Martel Villagrán, Jesús (2013-01-01)
Presentation
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Analytical circuit model for dipole frequency-selective surfaces

Rodríguez Berral, Raúl; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco; García Vigueras, María (Institute of Electrical and Electronics Engineers, 2013-01-01)
This contribution provides a fully analytical transmission-line circuit model for the transmission/reflection of an obliquely ...
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Dual capacitive-inductive nature of graphene metasurface: Transmission characteristics at low-terahertz frequencies

Padooru, Yashwanth R.; Yakovlev, Alexander B.; Kaipa, Chandra S.R.; Hansony, George W.; Medina Mena, Francisco; Mesa Ledesma, Francisco Luis (Institute of Electrical and Electronics Engineers, 2013-01-01)
We report on the dual nature (capacitive and inductive) of the surface impedance of periodic graphene patches at low-terahertz ...
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Enhanced transmission with a graphene-dielectric microstructure at low-terahertz frequencies

Kaipa, Chandra S. R.; Yakovlev, Alexander B.; Hanson, George W.; Padooru, Yashwanth R.; Medina Mena, Francisco; Mesa Ledesma, Francisco Luis (American Physical Society, 2012-01-01)
Here, we report on the transmissivity of electromagnetic waves through a stack of monolayer graphene sheets separated by ...
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Transmission through stacked 2D periodic distributions of square conducting patches

Kaipa, Chandra S. R.; Yakovlev, Alexander B.; Medina Mena, Francisco; Mesa Ledesma, Francisco Luis (American Institute of Physics, 2012-01-01)
In this paper, we study the transmissivity of electromagnetic waves through stacked two-dimensional printed periodic arrays ...
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New absorbing boundary conditions and analytical model for multilayered mushroom-type metamaterials: Applications to wideband absorbers

Padooru, Yashwanth R.; Yakovlev, Alexander B.; Kaipa, Chandra S.R.; Hanson, George W.; Medina Mena, Francisco; Mesa Ledesma, Francisco Luis; Glisson, Allen W. (Institute of Electrical and Electronics Engineers, 2012-01-01)
An analytical model is presented for the analysis of multilayer wire media loaded with 2-D arrays of thin material ...
Presentation
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Low-terahertz transmissivity with a graphene-dielectric micro-structure

Kaipa, Chandra S.R.; Yakovlev, Alexander B.; Hanson, George W.; Padooru, Yashwanth R.; Medina Mena, Francisco; Mesa Ledesma, Francisco Luis (Institute of Electrical and Electronics Engineers, 2012-01-01)
In this paper, we report on the analysis of transmissivity of electromagnetic waves through a stack of dielectric slabs ...
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Common-mode suppression in microstrip differential lines by means of complementary split ring resonators: Theory and applications

Naqui, Jordi; Fernández Prieto, Armando; Durán Sindreu, Miguel; Mesa Ledesma, Francisco Luis; Martel Villagrán, Jesús; Medina Mena, Francisco; Martín, Ferran (Institute of Electrical and Electronics Engineers, 2012-01-01)
This paper is focused on the application of complementary split-ring resonators (CSRRs) to the suppression of the common ...
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Simplified circuit model for arrays of metallic dipoles sandwiched between dielectric slabs under arbitrary incidence

García Vigueras, María; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco; Rodríguez Berral, Raúl; Gómez Tornero, José Luis (Institute of Electrical and Electronics Engineers, 2012-01-01)
This work presents an equivalent circuit to model the transmission/ reflection of a plane wave that impinges obliquely on ...
Presentation
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Fully analytical circuit-like approach for the TE scattering by narrow-slit printed gratings

Rodríguez Berral, Raúl; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco (Institute of Electrical and Electronics Engineers, 2012-01-01)
A fully analytical solution for the scattering of a uniform TE polarized plane wave by an infinite periodic printed array ...
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Analytical wideband model for strip/slit gratings loaded with dielectric slabs

Rodríguez Berral, Raúl; Molero Jiménez, Carlos; Medina Mena, Francisco; Mesa Ledesma, Francisco Luis (Institute of Electrical and Electronics Engineers, 2012-01-01)
This paper presents a fully analytical model to determine the transmission and reflection properties of planar 1-D ...
Presentation
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Generalized additional boundary conditions and analytical model for multilayered mushroom-type wideband absorbers

Padooru, Yashwanth R.; Yakovlev, Alexander B.; Kaipa, Chandra S.R.; Hanson, George W.; Medina Mena, Francisco; Mesa Ledesma, Francisco Luis; Glisson, Allen W. (Institute of Electrical and Electronics Engineers, 2012-01-01)
We present an analytical model to study the reflection properties of a multilayered wire media loaded with 2-D arrays of ...
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Quasi-analytical modeling of transmission/reflection in strip/slit gratings loaded with dielectric slabs

Rodríguez Berral, Raúl; Medina Mena, Francisco; Mesa Ledesma, Francisco Luis; García Vigueras, María (Institute of Electrical and Electronics Engineers, 2012-01-01)
This paper presents a quasi-analytical approach to study the classic topic of transmission/reflection of electromagnetic ...
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Low-frequency excitation of leaky modes in a microstripline with a top cover

Mesa Ledesma, Francisco Luis; Bernal Méndez, Joaquín; Jackson, David (2011-01-01)
This paper studies the excitation of a physical leaky mode in a covered microstrip structure at low frequencies. We calculate ...
PhD Thesis
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Cálculo eficiente de funciones de Green periódicas y no periódicas en Medios Homogéneos y en Medios Multicapa

Rodríguez Boix, Rafael; Mesa Ledesma, Francisco Luis; López Fructos, Ana María (2011-01-01)
En esta tesis se abordará el cálculo eficiente de funciones de Green en el dominio espacial en medios homogéneos y en ...
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Circuit modeling of multiband high-impedance surface absorbers in the microwave regime

Padooru, Yashwanth R.; Yakovlev, Alexander B.; Kaipa, Chandra S. R.; Medina Mena, Francisco; Mesa Ledesma, Francisco Luis (American Physical Society, 2011-01-01)
In this paper, we present a simple circuit model to study the absorption of electromagnetic waves by a multilayer structure ...
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Split rings-based differential transmission lines with common-mode suppression

Naqui, Jordi; Fernández Prieto, Armando; Durán Sindreu, Miguel; Selga, Jordi; Medina Mena, Francisco; Mesa Ledesma, Francisco Luis; Martín, Ferran (Institute of Electrical and Electronics Engineers, 2011-01-01)
A novel microstrip differential transmission line with common-mode noise suppression is proposed and experimentally ...
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Equivalent circuits for conventional and extraordinary reflection in dipole arrays

García Vigueras, María; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco; Rodríguez Berral, Raúl; Gómez Tornero, José Luis (Institute of Electrical and Electronics Engineers, 2011-01-01)
This presents an equivalent transmission-line circuit that accounts for the scattering of a TE polarized plane wave that ...
Presentation
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Multi-band high-impedance surface absorbers with a single resistive sheet: Circuit theory model

Padooru, Yashwanth R.; Yakovlev, Alexander B.; Kaipa, Chandra S.R.; Medina Mena, Francisco; Mesa Ledesma, Francisco Luis (Institute of Electrical and Electronics Engineers, 2011-01-01)
We present a simple and efficient circuit model for the analysis of multi-band absorption characteristics of a stack of ...
Presentation
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Analytical modeling of compound metallic reflection gratings

Medina Mena, Francisco; Mesa Ledesma, Francisco Luis; Skigin, Diana Carina (Institute of Electrical and Electronics Engineers, 2011-01-01)
The transmission and reflection of electromagnetic waves impinging on metallic surfaces with periodically distributed slits ...
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Design of a band-pass filter using stepped impedance resonators with floating conductors

Velázquez Ahumada, María del Castillo; Mesa Ledesma, Francisco Luis; Martel Villagrán, Jesús; Medina Mena, Francisco (2010-01-01)
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Application of stub loaded folded stepped impedance resonators to dual band filter design

Velázquez Ahumada, María del Castillo; Mesa Ledesma, Francisco Luis; Martel Villagrán, Jesús; Medina Mena, Francisco (2010-01-01)
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Circuit modeling of the transmissivity of stacked two-dimensional metallic meshes

Kaipa, Chandra S. R.; Yakovlev, Alexander B.; Medina Mena, Francisco; Mesa Ledesma, Francisco Luis; Butler, Celia A. M.; Hibbins, Alastair P. (Optical Society of America, 2010-01-01)
This paper presents a simple analytical circuit-like model to study the transmission of electromagnetic waves through ...
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Circuit model for a periodic array of slits sandwiched between two dielectric slabs

Rodríguez Berral, Raúl; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco (American Institute of Physics, 2010-01-01)
This paper proposes an equivalent circuit model that uses lumped elements and transmission lines to explain the transmission ...
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Study of extraordinary transmission in a circular waveguide system

Medina Mena, Francisco; Mesa Ledesma, Francisco Luis; Ruiz Cruz, Jorge A.; Rebollar, Jésus M.; Montejo Garai, José Ramón (Institute of Electrical and Electronics Engineers, 2010-01-01)
Extraordinary transmission through periodic distributions of sub-wavelength holes made in opaque screens has been demonstrated ...
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Extraordinary transmission through arrays of slits: A circuit theory model

Medina Mena, Francisco; Mesa Ledesma, Francisco Luis; Skigin, Diana Carina (Institute of Electrical and Electronics Engineers, 2010-01-01)
Extraordinary transmission and other interesting related phenomena for 1-D periodic arrays of slits (compound diffraction ...
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Analytical theory of wave propagation through stacked fishnet metamaterials

Marqués Sillero, Ricardo; Jelinek, L.; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco (Optical Society of America, 2009-01-01)
This work analyzes the electromagnetic wave propagation through periodically stacked fishnets from zero frequency to the ...
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Experimental verification of extraordinary transmission without surface plasmons

Medina Mena, Francisco; Ruiz Cruz, J. A.; Mesa Ledesma, Francisco Luis; Rebollar, J. M.; Montejo Garai, J. R.; Marqués Sillero, Ricardo (American Institute of Physics, 2009-01-01)
This letter provides an experimental demonstration of extraordinary transmission in a closed waveguide system loaded with ...
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Microstrip circuit analog of a complex diffraction phenomenon

Fernández Prieto, Armando; Medina Mena, Francisco; Mesa Ledesma, Francisco Luis (American Institute of Physics, 2009-01-01)
This letter presents a methodology to reproduce at microwave frequencies the physical behavior of certain diffraction ...
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Analytical theory of extraordinary transmission through metallic diffraction screens perforated by small holes

Marqués Sillero, Ricardo; Mesa Ledesma, Francisco Luis; Jelinek, L.; Medina Mena, Francisco (Optical Society of America, 2009-01-01)
In this letter, the problem of extraordinary (ET) transmission of electromagnetic waves through opaque screens perforated ...
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Some advances in the circuit modeling of extraordinary optical transmission

Medina Mena, Francisco; Mesa Ledesma, Francisco Luis; Rodríguez Berral, Raúl (Brno University of Technology, 2009-01-01)
The phenomenon of extraordinary optical transmission (EOT) through electrically small holes perforated on opaque metal ...
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Design of a dual band-pass filter using modified folded stepped-impedance resonators

Velázquez Ahumada, María del Castillo; Martel Villagrán, Jesús; Medina Mena, Francisco; Mesa Ledesma, Francisco Luis (Institute of Electrical and Electronics Engineers, 2009-01-01)
A folded stepped impedance resonator (SIR) modified by adding an inner quasi-lumped SIR stub is used as the basic block ...
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Periodic arrangements of chiral scatterers providing negative refractive index bi-isotropic media

Jelinek, L.; Marqués Sillero, Ricardo; Mesa Ledesma, Francisco Luis; Baena, J.D. (American Physical Society, 2008-01-01)
The main goal of this contribution is to show that periodic arrangements of chiral scatterers can be the basis for the ...
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Equivalent circuit model to explain extraordinary transmission

Medina Mena, Francisco; Mesa Ledesma, Francisco Luis; Marqués Sillero, Ricardo (Institute of Electrical and Electronics Engineers, 2008-01-01)
This work proposes a circuit model based explanation for the extraordinary transmission (ET) of light phenomenon studied ...
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Extraordinary transmission through arrays of electrically small holes from a circuit theory perspective

Medina Mena, Francisco; Mesa Ledesma, Francisco Luis; Marqués Sillero, Ricardo (Institute of Electrical and Electronics Engineers, 2008-01-01)
Extraordinary optical transmission of light or electromagnetic waves through metal plates periodically perforated with ...
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An efficient approach for the computation of 2-D Green's functions with 1-D and 2-D periodicities in homogeneous media

López Fructos, Ana María; Rodríguez Boix, Rafael; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco (Institute of Electrical and Electronics Engineers, 2008-01-01)
This paper presents an algorithm for the acceleration of the series involved in the computation of 2-D homogeneous Green's ...
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Closed-form expressions of multilayered planar Green's functions that account for the continuous spectrum in the far field

Mesa Ledesma, Francisco Luis; Rodríguez Boix, Rafael; Medina Mena, Francisco (Institute of Electrical and Electronics Engineers, 2008-01-01)
The rational function fitting method has been found useful in the derivation of closed-form expressions of spatial-domain ...
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Application of total least squares to the derivation of closed-form green's functions for planar layered media

Rodríguez Boix, Rafael; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco (Institute of Electrical and Electronics Engineers, 2007-01-01)
A new technique is presented for the numerical derivation of closed-form expressions of spatial-domain Green's functions ...
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Numerical implementation of the mixed potential integral equation for planar structures with ferrite layers arbitrarily magnetized

Mesa Ledesma, Francisco Luis; Medina Mena, Francisco (Wiley-Blackwell, 2006-01-01)
This work presents a new implementation of the mixed potential integral equation (MPIE) for planar structures that can ...
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Three-dimensional superresolution in metamaterial slab lenses: Experiment and theory

Mesa Ledesma, Francisco Luis; Freire Rosales, Manuel José; Marqués Sillero, Ricardo; Baena, J.D. (American Physical Society, 2005-01-01)
This paper presents a theoretical and experimental study on the viability of obtaining two- and three-dimensional ...
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Near-field enhanced imaging by a magnetized ferrite slab

Marqués Sillero, Ricardo; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco (American Institute of Physics, 2005-01-01)
This letter demonstrates the near-field imaging enhancement at microwave frequencies of two-dimensional sources by a ferrite ...
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Two-dimensional study of leaky modes in microstrip line with a semi-infinite cover layer

Rodríguez Berral, Raúl; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco (Wiley-Blackwell, 2004-01-01)
This work presents a two-dimensional (2-D) study of the modal spectrum of a single microstrip and a pair of coupled ...
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Enhanced Implementation of the Complex Images Method to Study Bound and Leaky Regimes in Layered Planar Printed Lines

Rodríguez Berral, Raúl; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco (Institute of Electrical and Electronics Engineers, 2004-01-01)
The discrete complex image technique, originally developed to deal with three-dimensional planar structures, has been ...
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Comment on "left-handed-media simulation and transmission of EM waves in subwavelength split-ring-resonator-loaded metallic waveguides"

Kondrat'ev, I. G.; Smirnov, A. I.; Marqués Sillero, Ricardo; Martel Villagrán, Jesús; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco (American Physical Society, 2003-01-01)
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Marqués et al. reply

Marqués Sillero, Ricardo; Martel Villagrán, Jesús; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco (American Physical Society, 2003-01-01)
A Reply to the Comment by I.G. Kondrat’ev and A.I. Smirnov.
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Comparative Analysis of Edge- and Broadside-Coupled Split Ring Resonators for Metamaterial Design - Theory and Experiments

Marqués Sillero, Ricardo; Mesa Ledesma, Francisco Luis; Martel Villagrán, Jesús; Medina Mena, Francisco (Institute of Electrical and Electronics Engineers, 2003-01-01)
This paper develops a quasi-analytical and self-consistent model to compute the polarizabilities of split ring resonators ...
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Left-handed-media simulation and transmission of EM waves in subwavelength split-ring-resonator-loaded metallic waveguides

Marqués Sillero, Ricardo; Medina Mena, Francisco; Martel Villagrán, Jesús; Mesa Ledesma, Francisco Luis (American Physical Society, 2002-10-28)
At microwave frequencies, hollow metallic waveguides behave in certain aspects as a “one-dimensional plasma.” This feature ...
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Efficient evaluation of reaction integrals in the EFIE analysis of planar layered structures with uniaxial anisotropy

Mesa Ledesma, Francisco Luis; Plaza Valtueña, Gonzalo; Medina Mena, Francisco (Institute of Electrical and Electronics Engineers, 2002-01-01)
This paper presents an efficient implementation of the electric-field integral-equation (EFIE) method to deal with planar ...
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Treatment of singularities and quasi-static terms in the EFIE analysis of planar structures

Plaza Valtueña, Gonzalo; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco (Institute of Electrical and Electronics Engineers, 2002-01-01)
This paper reports on some mathematical and numerical details of the application of the electric field integral equation ...
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2-D analysis of leakage in printed-circuit lines using discrete complex-images technique

Bernal Méndez, Joaquín; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco (Institute of Electrical and Electronics Engineers, 2002-01-01)
The mixed-potential integral equation is combined with the discrete complex-images technique to analyze the complete ...
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Analysis of the propagation of leaky magnetostatic modes in normally magnetized microstrip and slot lines

Marqués Sillero, Ricardo; Rafii-El-Idrissi, Rachid; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco (Institute of Electrical and Electronics Engineers, 2002-01-01)
The propagation of leaky forward magnetostatic (MS) volume waves along ferrite-loaded microstrip and slot lines is analyzed. ...
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Analysis of leakage in multilayered microstrip lines using complex images

Bernal Méndez, Joaquín; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco (Institute of Electrical and Electronics Engineers, 2001-01-01)
The Mixed Potential Integral Equation (MPIE) is combined with the complex image method to analyze the complete spectrum ...
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On the use of SDA for the analysis of boxed planar lines with complex media

Plaza Valtueña, Gonzalo; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco (Institute of Electrical and Electronics Engineers, 2001-01-01)
This paper discusses the conditions under which the spectral-domain approach (SDA) can be applied to the analysis of boxed ...
PhD Thesis
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Estudio del espectro modal del campo electromagnético excitado en líneas de microtiras

Mesa Ledesma, Francisco Luis; Freire Rosales, Manuel José (2000-04-24)
Este trabajo aborda el estudio del espectro modal del campo electromagnético excitado por fuentes de carácter práctico en ...
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Systematic Computation of the Modal Spectrum of Boxed Microstrip, Finline, and Coplanar Waveguides Via an Efficient SDA

Cano Gómez, Gabriel; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco; Horno Montijano, Manuel (Institute of Electrical and Electronics Engineers, 1995-01-01)
This work reports an efficient and systematic procedure to obtain the complete modal spectrum of multilayer boxed planar ...
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On the Quasi-TEM and Full-Wave Approaches Applied to Coplanar Multistrip on Lossy Dielectric Layered Media

Mesa Ledesma, Francisco Luis; Cano Gómez, Gabriel; Medina Mena, Francisco; Marqués Sillero, Ricardo; Horno Montijano, Manuel (Institute of Electrical and Electronics Engineers, 1992-01-01)
The characteristic parameters of coplanar multistrip lines embedded in multilayered lossless/lossy substrates are commonly ...
PhD Thesis
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Estudio de las características de propagación electromagnética en líneas multiconductoras de configuración planar inmersas en medios bianisótropos estratificados

Marqués Sillero, Ricardo; Horno Montijano, Manuel; Mesa Ledesma, Francisco Luis (1991-12-10)
Esta memoria está dedicada al estudio de la propagación electromagnética en líneas de transmisión de configuración planar. ...
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Quasi-TEM analysis of multilayered, multiconductor coplanar structures with dielectric and magnetic anisotropy including substrate losses

Horno Montijano, Manuel; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco; Marqués Sillero, Ricardo (Institute of Electrical and Electronics Engineers, 1990-01-01)
A quasi-TEM (transverse electromagnetic) analysis of multiconductor planar lines embedded in a layered structure involving ...