Listar por autor "Abdo-Sánchez, María Elena"
Mostrando ítems 21-40 de 43
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Eigenstate equivalent circuit for bi-periodic surfaces: Application to three parallel dipoles
Hernández Escobar, Alberto; Abdo-Sánchez, María Elena
; Esteban Marzo, Jaime; Martín-Guerrero, Teresa María; Camacho-Peñalosa, Carlos (2022-03-29)
An equivalent circuit for the unit cell of bi-periodic surfaces is proposed. The equivalent circuit is general and simple. It is based on the decomposition of the eigenmodes of the structure and it takes into account the ... -
Elemento radiante de banda ancha en microstrip cerrada para arrays alimentados en serie
A previous radiating element in transmission configuration proposed by the authors is alternatively implemented using enclosed microstrip configuration. The new implementation overcomes fabrication issues and improves its ... -
Equivalent Circuit Modelling of Non-Symmetric Reciprocal Lossy Electromagnetic Structures
Abdo-Sánchez, María Elena; Martín-Guerrero, Teresa María; Esteban Marzo, Jaime; Camacho-Peñalosa, Carlos (2018-06-04)
Lattice-network-based equivalent circuits of lossy symmetric reciprocal electromagnetic structures have shown superior performance when compared to other topologies like the T- or PI- networks. This is due to the realizability ... -
Estudio del desalineamiento entre capas para reducir el acoplamiento en metasuperficies.
La obtención de celdas unidad es un factor clave en el diseño de metasuperficies. Éstas suelen estar compuestas por varias capas de geometrías metálicas apiladas a través de sustratos. Para sintetizar unos parámetros S ... -
Experimental Verification of a Leaky-Wave Antenna Based on Bianisotropic Huygens’ Metasurface
Abdo-Sánchez, María Elena; Chen, Michael; Epstein, Ariel; Eleftheriades, George V. (2019-05-06)
Abstract—In this communication, the experimental verification of a leaky-wave antenna that uses a Huygens’ metasurface to have a control on the radiation parameters is addressed. The antenna consists of a parallel-plate ... -
Implementación de antena leaky-wave basada en metasuperficie de Huygens
Abdo-Sánchez, María Elena; Epstein, Ariel; Eleftheriades, George V. (2018-09-07)
In this communication, the implementation of a leaky-wave antenna based on bianisotropic Huygens’ metasurface is addressed. It consists of a parallel-plate waveguide in which the top plate is replaced by a metasurface. It ... -
Leaky-Wave antennas with arbitrary radiation based on bianisotropic Huygens’ metasurfaces
Abdo-Sánchez, María Elena; Epstein, Ariel; Eleftheriades, George V. (2018-06-05)
In this contribution, we present the application of Huygens’ metasurfaces (HMS) to the arbitrary design of leaky-wave antennas (LWAs). These metasurfaces have demonstrated their capabiity to tailor the electromagnetic waves ... -
Measuring odd- and even-mode propagation constants of coupled-lines by means of the lattice network
Hernández-Escobar, Alberto; Abdo-Sánchez, María Elena; Esteban Marzo, Jaime; Martín-Guerrero, Teresa María; Camacho-Peñalosa, Carlos (2019-10-30)
A classic method for measuring the propagation constant of transmission lines is the one proposed by Bianco and Parodi more than four decades ago [1]. It is based on the invariance of the cross ratio of four complex numbers ... -
Modeling of an Acoustic Leaky-Wave Antenna for Spatial Localization.
Fernández-Garrido, Alejandro; Campo-Valera, María; Abdo-Sánchez, María Elena; Picó, Rubén; Asorey-Cacheda, Rafael (2024)
The use of acoustic signals to locate objects in space has evolved significantly, highlighting techniques such as SONAR. An innovative alternative are Acoustic Leaky-Wave Antennas (ALWAs), which, inspired by electromagnetic ... -
Modelling asymmetric two-port reciprocal microwave structures by means of compact equivalent circuits
Abdo-Sánchez, María Elena; Martín-Guerrero, Teresa María; Esteban Marzo, Jaime; Camacho-Peñalosa, Carlos (2019)
Effective microwave systems design requires powerful and reliable modeling techniques. Today modern CAD tools provide such support from device physics to circuit level or from electromagnetics to system level. Nevertheless, ... -
Non-homogeneous Fabry-Pérot Antenna Design at Ku-band
Mateos-Ruiz, Pablo; Abdo-Sánchez, María Elena; Camacho-Peñalosa, Carlos (2021-09-21)
A novel technique to design Fabry-Pérot antennas with non-homogeneous PRS is described. It takes advantage of a transmission line circuit model to efficiently obtain all necessary unit cell designs that satisfy the cavity ... -
Non-homogeneous Fabry-Pérot antenna design process to improve aperture efficiency
Mateos-Ruiz, Pablo; Abdo-Sánchez, María Elena; Camacho-Peñalosa, Carlos (2022-03-27)
A novel technique to design Fabry-Pérot antennas with non-homogeneous partially reflective surfaces (PRSs) is described. It uses a transmission line circuit model to efficiently obtain all necessary unit cell designs that ... -
Novel Implementation for a Cavity-Backed Slot Fed in Transmission Configuration
A novel radiating element proposed previously by the authors is alternatively implemented using enclosed microstrip configuration. The radiating element shows broad impedance bandwidth and unidirectional radiation pattern. ... -
On the eigenstate equivalent circuit for lossy asymmetric two-ports and its applications
Esteban Marzo, Jaime; Hernández Escobar, Alberto; Abdo-Sánchez, María Elena; Mateos-Ruiz, Pablo; Martín-Guerrero, Teresa María; Camacho-Peñalosa, Carlos[et al.] (2022)
An equivalent-circuit topology for two-port lossy non-symmetric reciprocal networks is presented [1]. The circuit topology is based on the eigenstate decomposition. The proposed circuit consists of two immittances and two ... -
On the Phase Response and Radiation Efficiency of the Complementary Strip-Slot as an Array Element
Abdo-Sánchez, María Elena; Martín-Guerrero, Teresa María; Esteban Marzo, Jaime; Camacho-Peñalosa, Carlos (2015-05-05)
The complementary strip-slot element is a broadlymatched microstrip radiator that has been used to design innovative series-fed arrays. It consists of a microstrip series-fed slot that have its complementary stub on the ... -
On the use of bianisotropic huygens' metasurfaces to build leaky-wave antennas
Abdo-Sánchez, María Elena; Chen, Michael; Epstein, Ariel; Eleftheriades, George V. (2019-07-16)
Huygens' metasurfaces are considered a powerful tool to achieve anomalous electromagnetic field transformations. They consist of an artifcial surface built of pairs of collocated electric and magetic dipoles that force ... -
Performance analysis of equivalent-circuit topologies for periodic leaky-wave antenna rsymmetric Radiators
Hernández Escolar, Alberto; Abdo-Sánchez, María Elena; Mateos-Ruiz, Pablo; Esteban Marzo, Jaime; Martín-Guerrero, Teresa María; Camacho-Peñalosa, Carlos[et al.] (2022-04)
The traditional problem of broadside radiation degradation in leaky-wave antennas has been overcome in the past years with the introduction of some asymmetry in the radiator. This article analyses the performance of two ... -
Physical Implementation of Leaky-Wave Antenna with Engineered Aperture Distribution Based on Bianisotropic Huygens Metasurfaces
A methodology based on omega-type bianisotropic Huygens’ metasurfaces is presented to control the aperture field distribution of leaky-wave antennas. The studied structure is a parallel-plate waveguide with the top plate ... -
Ranura de Banda Ancha en Doble T Sobre Cavidad para Arrays Alimentados en Serie
A previous radiating element for series-fed arrays proposed by the authors and based on a Cavity-Backed Slot (CBS) is modified to improve its bandwidth. In order to do that, the slot is modified to reduce its resonance ... -
Reconfigurability mechanisms with scanning rate control for omega-bianisotropic Huygens’ metasurface leaky-wave antennas
Abdo-Sánchez, María Elena; Epstein, Ariel; Eleftheriades, George V. (IEEE, 2019)
In this paper, different reconfigurability mechanisms are proposed to scan the pointing direction at a fixed frequency of recently-proposed leaky-wave antennas based on omega-bianisotropic Huygens' metasurfaces. The ...