Recent Submissions

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    Multilayered balanced dual-band bandpass filter based on magnetically coupled open-loop resonators with intrinsic common-mode rejection  [Article]

    Medrán del Río, José L.; Lujambio, Aintzane; Fernández Prieto, Armando; Martínez Ros, Alejandro Javier; Martel Villagrán, Jesús; Medina Mena, Francisco (Multidisciplinary Digital Publishing Institute (MDPI), 2020)
    A new dual-band balanced bandpass filter based on magnetically coupled open-loop resonators in multilayer technology is proposed in this paper. The lower differential passband, centered at the Global Positioning System ...
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    Enhanced modelling of split-ring resonators couplings in printed circuits  [Article]

    Bojanić, Radovan; Milošević, Vojislav; Jokanovic, Branka; Medina Mena, Francisco; Mesa Ledesma, Francisco Luis (Institute of Electrical and Electronics Engineers, 2014)
    An enhanced equivalent circuit approach for the magnetic/electric interaction of single split-ring resonators (SRRs) with printed lines is presented in this paper. A very simple and efficient lumped-element network is ...
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    Analytical circuit model for 1-D periodic T-shaped corrugated surfaces  [Article]

    Molero Jiménez, Carlos; Rodríguez Berral, Raúl; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco (Institute of Electrical and Electronics Engineers, 2014)
    An analytical circuit model is obtained to study the reflection of TM polarized electromagnetic waves that impinge obliquely on a 1-D periodic corrugated surface consisting of dielectric-loaded T-shaped planar corrugations ...
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    Non-uniform sinusoidally modulated half-mode leaky-wave lines for near-field focusing pattern synthesis  [Article]

    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)
    A novel non-uniform sinusoidally modulated half-mode microstrip structure with application to near-field focused leaky-wave radiation in the backward Fresnel zone is proposed. First, it is presented a dispersion analysis ...
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    Compact balanced FSIR bandpass filter modified for enhancing common-mode suppression  [Article]

    Fernández Prieto, Armando; Martel Villagrán, Jesús; Medina Mena, Francisco; Mesa Ledesma, Francisco Luis; Rodríguez Boix, Rafael (Institute of Electrical and Electronics Engineers, 2015)
    A novel balanced bandpass filter (BPF) based on folded stepped impedance resonators (FSIR's) with modified ground plane is presented in this work. By symmetrically introducing a series-LC resonant structure below the FSIR's, ...
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    Ultra-compact (80 mm 2) differential-mode ultra-wideband (UWB) bandpass filters with common-mode noise suppression  [Article]

    Vélez, Paris; Naqui, Jordi; Fernández Prieto, Armando; Bonache, Jordi; Mata Contreras, Javier; Martel Villagrán, Jesús; Medina Mena, Francisco; Martín, Ferran (Institute of Electrical and Electronics Engineers, 2015)
    This paper presents a novel approach for the implementation of balanced ultra-wideband (UWB) bandpass filters with common-mode noise suppression. To a first-order approximation, the differential-mode filter response is ...
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    Analytical Multimodal Network Approach for 2-D Arrays of Planar Patches/Apertures Embedded in a Layered Medium  [Article]

    Rodríguez Berral, Raúl; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco (Institute of Electrical and Electronics Engineers, 2015)
    A fully analytical multimodal equivalent circuit is presented for the modeling of the scattering of an obliquely incident plane wave by a two-dimensional (2-D) periodic array of metallic patches (or apertures in a metallic ...
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    Simple and compact balanced bandpass filters based on magnetically coupled resonators  [Article]

    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)
    A simple strategy is proposed to design differential-mode bandpass filters with good common-mode (CM) rejection using simple resonators. Specifically, the CM rejection is enhanced by using conventional open-loop resonators ...
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    Modeling of Nonresonant Longitudinal and Inclined Slots for Resonance Tuning in ENZ Waveguide Structures  [Article]

    Vojnović, Nebojša; Jokanovic, Branka; Radovanović, Miloš; Medina Mena, Francisco; Mesa Ledesma, Francisco Luis (Institute of Electrical and Electronics Engineers, 2015)
    Novel methods are presented for the independent resonance tuning in rectangular waveguide epsilon-near-zero (ENZ) structures. This kind of tuning is achieved using short longitudinal and inclined slots placed in the middle ...
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    Accurate circuit modeling of fishnet structures for negative-index-medium applications  [Article]

    Torres, Víctor; Mesa Ledesma, Francisco Luis; Navarro Cía, Miguel; Rodríguez Berral, Raúl; Beruete, Miguel; Medina Mena, Francisco (Institute of Electrical and Electronics Engineers, 2016)
    Metallic plates with a two-dimensional (2D) periodic distribution of sub-wavelength apertures are known to exhibit extraordinary transmission of electromagnetic waves. Stacking two or more of such plates gives place to the ...
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    Simplified Modal Expansion to Analyze Frequency-Selective Surfaces: An Equivalent Circuit Approach  [Article]

    Mesa Ledesma, Francisco Luis; Rodríguez Berral, Raúl; García Vigueras, María; Medina Mena, Francisco; Mosig, Juan Ramón (Institute of Electrical and Electronics Engineers, 2016)
    This communication extends a previously reported analytical circuit that models the plane wave scattering by 2-D arrays of planar patches/apertures embedded in a layered media. In this extension, it is assumed that the ...
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    Dynamical Equivalent Circuit for 1-D Periodic Compound Gratings  [Article]

    Molero Jiménez, Carlos; Rodríguez Berral, Raúl; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco (Institute of Electrical and Electronics Engineers, 2016)
    Metallic compound gratings are studied in this work by means of an analytical equivalent circuit approach in order to obtain its transmission and reflection properties when illuminated by a TM-polarized plane wave. A ...
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    Excitation of Discrete and Continuous Spectrum in Subdiffraction Wire-Medium Type Lenses  [Article]

    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)
    Subwavelength imaging of the near field of a magnetic line-source excitation is studied for several wire-medium (WM) lens topologies using complex-plane analysis of the radiation integral. Nonlocal homogenization is used ...
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    Compact Balanced Dual-Band Bandpass Filter Based on Modified Coupled-Embedded Resonators  [Article]

    Bagci, Fulya; Fernández Prieto, Armando; Lujambio, Aintzane; Martel Villagrán, Jesús; Bernal Méndez, Joaquín; Medina Mena, Francisco (Institute of Electrical and Electronics Engineers, 2017)
    A new compact balanced dual-band bandpass filter based on coupled-embedded resonators with modified ground plane is presented in this work. Common-mode is rejected within the two differential passbands by symmetrically ...
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    Differential Lines for Common-Mode Suppression Based in Hybrid Microstrip/CPW Technology  [Article]

    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)
    A symmetrical pair of differential microstrip lines implemented in hybrid microstrip/coplanar waveguide (CPW) technology is proposed. Transmission-line models are used to analyze differential-and common-mode responses, ...
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    Annular apertures in metallic screens as extraordinary transmission and frequency selective surface structures  [Article]

    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)
    A 2-D periodic array of annular apertures (or ring slots) is studied using an accurate circuit model. The model accounts for distributed and dynamic effects associated with the excitation of high-order modes operating above ...
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    Compact balanced-to-balanced diplexer based on split-ring resonators balanced bandpass filters  [Article]

    Fernández Prieto, Armando; Lujambio, Aintzane; Martín, Ferran; Martel Villagrán, Jesús; Medina Mena, Francisco; Rodríguez Boix, Rafael (Institute of Electrical and Electronics Engineers, 2018)
    A compact balanced-to-balanced diplexer composed of two balanced bandpass filters is proposed in this letter. The balanced filters are implemented using compact edge-coupled square split-ring resonators. The design methodology ...
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    Resonant Modes of a Waveguide Iris Discontinuity: Interpretation in Terms of Canonical Circuits  [Article]

    Rodríguez Berral, Raúl; Mesa Ledesma, Francisco Luis; Medina Mena, Francisco (Institute of Electrical and Electronics Engineers, 2018)
    This paper presents an eigenproblem for computing the resonances of multiresonant irislike discontinuities in waveguides. The formulation of the eigenproblem is based on integral equation methods, and its solution provides ...
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    NUFFT for the Efficient Spectral Domain MoM Analysis of a Wide Variety of Multilayered Periodic Structures  [Article]

    Camacho, Miguel; Rodríguez Boix, Rafael; Medina Mena, Francisco (Institute of Electrical and Electronics Engineers, 2019)
    In this paper the Method of Moments (MoM) in the spectral domain is used for the analysis of multilayered structures containing periodic arrays of either patches or apertures. The patches and apertures may have many different ...
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    Extraordinary Transmission and Radiation from Finite by Infinite Arrays of Slots  [Article]

    Camacho, Miguel; Rodríguez Boix, Rafael; Medina Mena, Francisco; Hibbins, Alastair Paul; Sambles, John Roy (Institute of Electrical and Electronics Engineers, 2020)
    In this communication an efficient method of moments (MoM) code is used for the analysis of the extraordinary transmission (EOT) through a periodic array of rectangular slots in a conducting screen, in the case where the ...

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