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Listar por autor "Abdo-Sánchez, María Elena"
Mostrando ítems 21-37 de 37
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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; Martin-Guerrero, Teresa Maria; 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 ... -
Modelling asymmetric two-port reciprocal microwave structures by means of compact equivalent circuits
Abdo-Sánchez, María Elena; Martin-Guerrero, Teresa Maria; 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; Martin-Guerrero, Teresa Maria; 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; Martin-Guerrero, Teresa Maria; 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; Martin-Guerrero, Teresa Maria; 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 ... -
The Complementary Strip-Slot: Analysis and Antenna Applications
Abdo-Sánchez, María Elena (Servicio de Publicaciones y Divulgación Científica, 2015)Aunque el diseño de la antena en un sistema de comunicaciones pueda parecer un problema clásico, los servicios que han aparecido recientemente requieren nuevas funcionalidades, mayores anchos de banda, mejor eficiencia y ... -
The Complementary Strip-Slot: From the Unit-Cell of Artificial Transmission Lines to the Basic Element of Novel Antennas
Abdo-Sánchez, María Elena; Esteban Marzo, Jaime; Martin-Guerrero, Teresa Maria; Page de la Vega, Juan Enrique; Camacho-Peñalosa, Carlos (2014-09-11)The complementary strip-slot radiating element and its applications are reviewed. The element is a modified version of the conventional microstrip-fed slot that presents very broad matching. Its inherent lattice equivalent ...