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Indirect Detection of Gravitational Waves Method Validation Using an Analogue Electromagnetic Spacetime Modulated Medium
Enderson Falcón-Gómez;Kerlos Atia Abdalmalak;Adrian Amor-Martin;Alfonso Gonzalez Jimenez;Valentin De La Rubia;Gabriel Santamaria Botello;Vittorio De Falco;Luis Enrique García Muñoz
2023 17th European Conference on Antennas and Propagation (EuCAP)
Year: 2023 | Conference Paper |
This manuscript studies the interaction between Gravitational Plane Waves and Electromagnetic Plane Waves by means of an analogous electromagnetic model of gravity, where the electromagnetic properties codify the variations in the metric tensor produced by the Gravitational Plane Wave. A space-time modulation of the electromagnetic properties of the medium is generated and analyzed via the Finite-...Show More
Indirect Detection of Gravitational Waves Method Validation Using an Analogue Electromagnetic Spacetime Modulated Medium
Enderson Falcón-Gómez;Kerlos Atia Abdalmalak;Adrian Amor-Martin;Alfonso Gonzalez Jimenez;Valentin De La Rubia;Gabriel Santamaria Botello;Vittorio De Falco;Luis Enrique García Muñoz
Year: 2023 | Conference Paper |
Advantages and Limitations of Quantum Radar
Isabel Carnoto Amat;Alfonso González Jiménez;Enderson Falcón Gómez;Kerlos Atia Abdalmalak;Pablo Fajardo;Juan Francisco Cabrero;Luis Enrique García Muñoz
2023 17th European Conference on Antennas and Propagation (EuCAP)
Year: 2023 | Conference Paper |
This paper presents the advantages and limitations of a quantum radar system. The use of entangled photons to interrogate a region of space where a target is supposed to be, gives a lower probability of error than using a classical signal. This is possible because of the extra information that the quantum entanglement property can give us. This information helps us to distinguish between the signa...Show More
Antenna Radiation Properties from a Quantum Perspective
Alfonso González Jiménez;Enderson Falcón Gómez;Kerlos Atia Abdalmalak;Isabel Carnoto Amat;Luis Enrique García Muñoz
2023 17th European Conference on Antennas and Propagation (EuCAP)
Year: 2023 | Conference Paper |
We present for the first time the analysis of an actual antenna radiating coherent states from a quantum perspective. Using Quantum Electrodynamics, we show different lights states such as Fock states and the coherent states. The radiation produced by a classical current is associated with Glauber or coherent states. We use a λ/2 dipole for showing this quantum radiation properties. Finally, we sh...Show More
Analogous Electromagnetic Wave Propagation in a Schwarzschild Black Hole Space-time Using a Parallel Pair of Curved Conducting Surfaces
Enderson Falcón-Gómez;Kerlos Atia Abdalmalak;Adrian Amor-Martin;Alfonso Gonzalez Jimenez;Valentin De La Rubia;Gabriel Santamaria Botello;Vittorio De Falco;Luis Enrique García Muñoz
2023 17th European Conference on Antennas and Propagation (EuCAP)
Year: 2023 | Conference Paper |
We demonstrate that a waveguide consisting of a Pair of Parallel Curved Conducting Surfaces can be used as an analogous electromagnetic model of the gravitational field generated by a Schwarzschild black hole. The influence of gravity on the propagation of electromagnetic waves is encoded in the curvature of the surfaces of the waveguide. The results obtained for the propagation of a one-dimension...Show More
Analogous Electromagnetic Wave Propagation in a Schwarzschild Black Hole Space-time Using a Parallel Pair of Curved Conducting Surfaces
Enderson Falcón-Gómez;Kerlos Atia Abdalmalak;Adrian Amor-Martin;Alfonso Gonzalez Jimenez;Valentin De La Rubia;Gabriel Santamaria Botello;Vittorio De Falco;Luis Enrique García Muñoz
Year: 2023 | Conference Paper |
A Broadband Circularly Polarized Single-Layer Metasurface Antenna Using Characteristic-Mode Analysis
Ahmed El Yousfi;Abdenasser Lamkaddem;Kerlos Atia Abdalmalak;Daniel Segovia-Vargas
In this work, we propose a low-profile single-layer coplanar waveguide (CPW)-fed metasurface (MTS) antenna with broadband circular polarization (CP) radiation. With the help of characteristic-mode analysis (CMA), a $\textbf {3}\times \textbf {4}$ MTS is analyzed to reveal the useful modes supported by the structure. Consequently, two modes with orthogonal current distribution, broadside radiatio...Show More
Polarization Reconfigurable Wideband Metasurface Antenna With Low Profile
Ahmed El Yousfi;Abdenasser Lamkaddem;Kerlos Atia Abdalmalak;Daniel Segovia-Vargas
2022 International Workshop on Antenna Technology (iWAT)
Year: 2022 | Conference Paper |
This paper presents a low-profile single-layer metasurface antenna with reconfigurable polarization ability. The proposed design consists of 3 × 4 rectangular metasurface elements and a coplanar waveguide feeding line (CPW) which are all lying on the same substrate. The polarization reconfigurability is achieved using pin diodes that are embedded in the coplanar waveguide feeding line. Therefore, ...Show More
Design of a Low Frequency and Wide Band Reflector Antenna Feed for Future Earth Observation Radiometers
Rubén Caballero Nagore;Josep Closa Soteras;Tamara Coello Garrido;Kerlos Atia Abdalmalak;Luis Enrique García Muñoz;Aitor Martinez Agoues
2022 16th European Conference on Antennas and Propagation (EuCAP)
Year: 2022 | Conference Paper |
A complete reflector antenna architecture solution has been developed for Cryorad mission operating from 400 MHz to 2 GHz. This paper analyzes the antenna feed requirements and proposes an array feed solution comprised of two different frequency feeds. The design and analysis of one the proposed conical logarithmic spiral feed have been carried out. More than 10 dB of directivity radiation pattern...Show More
Broadband Circularly Polarized Reconfigurable Single Layer Metasurface Antenna
Ahmed El Yousfi;Abdenasser Lamkaddem;Kerlos Atia Abdalmalak;Daniel Segovia-Vargas
2022 16th European Conference on Antennas and Propagation (EuCAP)
Year: 2022 | Conference Paper |
Cited by: Papers (1)
A low-profile wideband circularly polarized reconfigurable metasurface antenna is proposed. The proposed antenna consists of a 3 × 4 rectangular metasurface element (MTS) and a rotated coplanar waveguide feeding line (CPW). Four PIN diodes (D1, D2, D3, and D3) are utilized to realize circular polarization reconfigurability. The antenna could operate in left-handed circular polarization (LHCP) and ...Show More
Circularly Polarized Miniaturized Implantable Antenna for Leadless Pacemaker Devices
Abdenasser Lamkaddem;Ahmed El Yousfi;Kerlos Atia Abdalmalak;Vicente González Posadas;Daniel Segovia-Vargas
A compact circularly polarized (CP) implantable antenna working at 915 MHz, at the industrial, scientific, and medical (ISM) band, is developed in this article. The proposed radiator is based on a fully planar and low-profile patch antenna with a ground plane and different slots but without any via holes, which makes the structure a good candidate for implantable devices. The circular polarization...Show More
Miniaturized Circularly polarized Single-layer Metasurface Antenna using Characteristic Modes
Ahmed El Yousfi;Abdenasser Lamkaddem;Kerlos Atia Abdalmalak;L. E García Muñoz;Daniel Segovia Vargas
2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI)
Year: 2021 | Conference Paper |
Cited by: Papers (5)
This paper presents a miniaturized single layer low profile metasurface (MTS) antenna fed through a Coplanar waveguide (CPW). The metasurface is constituted by 3x4 rectangular loop cells. In a different way to that of the conventional rectangular MTS, the proposed loop unit cell presents a compact size due to its inductive effect. The characteristic mode analysis shows that two orthogonal modes ca...Show More
A Miniaturized Triple-Band and Dual-Polarized Monopole Antenna Based on a CSRR Perturbed Ground Plane
Ahmed El Yousfi;Abdenasser Lamkaddem;Kerlos Atia Abdalmalak;Daniel Segovia-Vargas
This paper proposes a new triple-band monopole antenna based on Complementary Split Ring Resonators (CSRR) perturbing the ground plane (GND). The antenna consists of an inverted-L-shaped monopole fed by a modified microstrip line with two CSRRs cut out of the ground plane. The operational bands are independently controlled by the CSRR unit cell parameters. In addition, the antenna presents a dual-...Show More
Design of a Broadband Circularly-Polarized Single-Layer Metasurface Antenna Using CMA
Ahmed El Yousfi;Abdenasser Lamkaddem;Kerlos Atia Abdalmalak;Daniel Segovia Vargas
2021 15th European Conference on Antennas and Propagation (EuCAP)
Year: 2021 | Conference Paper |
Cited by: Papers (11)
This paper presents a single layer low profile broadband circularly polarized (CP) metasurface (MTS) antenna fed through a Coplanar Waveguide (CPW). The MTS consists of 3x4 rectangular cells. Contrary to conventional technique based on plotting surface current distribution to demonstrate the CP operation, Characteristic Mode Analysis (CMA) is employed to give more insight into the MTS and explain ...Show More
Gain enhancement and miniaturization of UWB antenna using metamaterial-based FSS
Abdenasser Lamkaddem;Ahmed El Yousfi;Kerlos Atia Abdalmalak;Luis Enrique García Muñoz;Daniel Segovia-Vargas
2020 International Symposium on Antennas and Propagation (ISAP)
Year: 2021 | Conference Paper |
Cited by: Papers (2)
This paper presents the design of a compact, low profile ultra-wideband antenna. The proposed antenna consists of a simple rectangular shape placed at a distance h = 10 mm in front of a frequency selective surface. The antenna has a reflection coefficient lower than 10 dB from 3.4 to 11.3 GHz, and a maximum gain of 7.29 dBi at 5 GHz where the gain is increased by 5 dBi over the antenna without FSS...Show More
Dielectric Resonator Antenna Fed by Tapered Dielectric Rod Waveguide for 5G mm-Wave Applications
Khalid Alsirhani;Kerlos Atia Abdalmalak;Choon Sae Lee;Gabriel Santamaría-Botello;Daniel Segovia-Vargas;Luis Enrique García-Muñoz
2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting
Year: 2020 | Conference Paper |
Cited by: Papers (11)
The design of a rectangular dielectric resonator antenna (RDRA) for 5G millimeter-wave (mm-wave) applications is presented. The design consists of a rectangular dielectric resonator placed at the top of a rectangular dielectric rod waveguide (RDRW) to eliminate loss from metallic parts used to feed the DRA. The antenna is fed by a metallic waveguide (WR-34) that operates in the range of 22 to 33 G...Show More
Compact Millimeter and Submillimeter-Wave Photonic Radiometer for Cubesats
Michał Wasiak;Gabriel Santamaría Botello;Kerlos Atia Abdalmalak;Florian Sedlmeir;Alfredo Rueda;Daniel Segovia-Vargas;Harald G. L. Schwefel;Luis Enrique García Muñoz
2020 14th European Conference on Antennas and Propagation (EuCAP)
Year: 2020 | Conference Paper |
Cited by: Papers (1)
In this paper we present a room temperature radiometer that can eliminate the need of using cryostats in satellite payload reducing its weight and improving reliability. The proposed radiometer is based on an electro-optic upconverter that boosts up microwave photons energy by upconverting them into an optical domain what makes them immune to thermal noise even if operating at room temperature. Th...Show More
Effect of Metal Resistive Losses on the Gain of a THz Planar Spiral Antenna
2020 14th European Conference on Antennas and Propagation (EuCAP)
Year: 2020 | Conference Paper |
Cited by: Papers (3)
Full-wave finite-element antenna simulations are carried out between 100 and 700 GHz for a planar square spiral antenna, investigating the effect on the antenna gain of resistive losses in the metal arms. It is found that a large degradation of the gain occurs relative to the same antenna with arms of pure gold. However, the degradation is greatest at low frequencies where the skin depth in the lo...Show More
High-Gain, Circularly-Polarized THz Antenna With Proper Modeling of Structures With Thin Metallic Walls
Dominika Warmowska;Kerlos Atia Abdalmalak;Luis Enrique García Muñoz;Zbynek Raida
In the paper, a corporate feed antenna array with slot radiators and a layer of polarizing patches is designed to operate at 350 GHz. The antenna is conceived as a silicon structure fully metalized by gold. Different methods for modeling thin gold layers at terahertz frequencies are compared and the optimum approaches are chosen depending on the thickness of the metal layer and its relation to the...Show More
Ultrawideband Conical Log-Spiral Circularly Polarized Feed for Radio Astronomy
Kerlos Atia Abdalmalak;Gabriel Santamaría Botello;Sergio Llorente-Romano;Alejandro Rivera-Lavado;Jonas Flygare;José Antonio López Fernándezs;José Manuel Serna Puente;Luis Emilio García-Castillo;Daniel Segovia-Vargas;Miroslav Pantaleev;Luis Enrique García-Muñoz
In order to meet the requirements of the new generation of radio telescopes, we have developed a new topology called DYQSA, which stands for DYson Quad-Spiral Array. The design exhibits dual circular polarization contrary to dual linear polarization of state-of-the-art feeds. It covers the required ultrawideband (UWB) from 2 to 14 GHz with an almost constant and real input impedance which facilita...Show More
Ultrawideband Conical Log-Spiral Circularly Polarized Feed for Radio Astronomy
Kerlos Atia Abdalmalak;Gabriel Santamaría Botello;Sergio Llorente-Romano;Alejandro Rivera-Lavado;Jonas Flygare;José Antonio López Fernándezs;José Manuel Serna Puente;Luis Emilio García-Castillo;Daniel Segovia-Vargas;Miroslav Pantaleev;Luis Enrique García-Muñoz
Photonic upconversion for THz radiometry
Gabriel Santamaría Botello;Kerlos Atia Abdalmalak;Daniel Segovia-Vargas;Luis Enrique García Muñoz
2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)
Year: 2019 | Conference Paper |
Cited by: Papers (2)
We analyze the feasibility of upconverting mm-wave and THz radiation to the optical domain for high sensitivity radiometry with no need of cryogenic operation. The upconversion takes place via electro-optic modulation in high-Q whispering-gallery resonators. Theoretical noise results show that room-temperature upconversion schemes can achieve sensitivity values comparable to those of cooled state-...Show More
A Compact Circularly Polarized High-Gain Antenna Array for Ka-Band CubeSats Applications
Dominika Warmowska;Kerlos Atia Abdalmalak;Luis Enrique García Muñoz;Zbynek Raida
2019 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)
Year: 2019 | Conference Paper |
In this work, we present a high-gain, low-profile circularly polarized 8×8 element antenna array operating in Ka-band at 35 GHz. The antenna is a great fit for establishing a communication link between a CubeSat and ground station. The performance was validated using full-wave simulation. Finally, a prototype of the antenna was manufactured by 3D-printing and its performance was measured.Show More
3-D-Printed Dielectric Resonator Antenna Arrays Based on Standing-Wave Feeding Approach
Ayman A. Althuwayb;Kerlos A. Abdalmalak;Choon S. Lee;Gabriel Santamaría-Botello;Luis E. García-Castillo;Daniel Segovia-Vargas;Luis E. García-Muñoz
A novel feeding method for a dielectric resonator array antenna is introduced. Unlike in a corporate feed network, power dividers or quarter-wave transformers are not needed in the new feeding scheme as the design is based on the standing-wave concept. Consequently, the feed network is greatly simplified, and undesired spurious radiation in the feeding network is minimized. The simulated and measu...Show More
Microwave Radiation Coupling into a WGM Resonator for a High-Photonic-Efficiency Nonlinear Receiver
Kerlos Atia Abdalmalak;Gabriel Santamaría-Botello;Choon Sae Lee;Alejandro Rivera-Lavado;Luis Emilio García-Castillo;Daniel Segovia-Vargas;Luis Enrique García-Muñoz
In this paper, a scheme for a direct coupling of the microwave radiation into a nonlinear whispering-gallery mode (WGM) receiver is presented. This nonlinear receiver can be used for the detection of the weak radiation for radio astronomy applications at room temperature. It depends on the upconverting of the microwave signal into the optical domain through a nonlinear material. The proposed schem...Show More
An updated version of the Dyson Conical Quad-Spiral Array (DYQSA) feed system for VGOS applications
Kerlos Atia Abdalmalak;Gabriel Santamaría Botello;Sergio Llorente Romano;Luis Enrique García Muñoz;Daniel Segovia Vargas
2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting
Year: 2017 | Conference Paper |
Cited by: Papers (2)
This paper presents the design of an updated version of the dual polarized ultra wideband feed system for covering the new VGOS (VLBI Global Observation System). This feed system is based on an array version of four elements of the self-complementary conical log spiral antennas. The feed system achieves the VGOS's requirements with operating with high efficiency (> 50%) in a wide bandwidth from 2 ...Show More
Study of free-space coupling into mm-wave whispering-gallery mode resonators for a radioastronomy receiver
Gabriel Santamaría-Botello;Kerlos Atia Abdalmalak;Maria-Theresa Schlecht;David González-Ovejero;Florian Sedlmeir;Harald G. L. Schwefel;Stefan Malzer;Heiko Weber;Daniel Segovia-Vargas;Darragh McCarthy;John Anthony Murphy;Gottfried H. Döhler;Luis Enrique García Muñoz
2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting
Year: 2017 | Conference Paper |
Cited by: Papers (1)
In this paper, the coupling mechanism of a free-space Gaussian beam into a whispering-gallery mode resonator through a dielectric lens is mathematically modeled and numerically solved by means of the Schelkunoff-Waterman method (the so called T-matrix method). This approach allows in principle, to quickly analyze the performance of different near-field coupling mechanisms with arbitrary excitation...Show More
Study of free-space coupling into mm-wave whispering-gallery mode resonators for a radioastronomy receiver
Gabriel Santamaría-Botello;Kerlos Atia Abdalmalak;Maria-Theresa Schlecht;David González-Ovejero;Florian Sedlmeir;Harald G. L. Schwefel;Stefan Malzer;Heiko Weber;Daniel Segovia-Vargas;Darragh McCarthy;John Anthony Murphy;Gottfried H. Döhler;Luis Enrique García Muñoz
Year: 2017 | Conference Paper |
Study of near-field coupling in whispering gallery mode resonators
Gabriel Santamaría Botello;Kerlos Atia Abdalmalak;Daniel Segovia-Vargas;Luis-Enrique García-Muñoz
In this paper, an analytical framework is developed to study the performance of a planar-interface near-field coupler into a whispering gallery mode (WGM) resonator. We focus on the efficient coupling of a Gaussian beam under total internal reflection (TIR) at the planar interface of a lens, which is near a spherical resonator. The aim is to optimize the coupling in WGM nonlinear resonators, for h...Show More
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