A5057501762- Microwave Engineering and Waveguides
- Advanced Antenna and Metasurface Technologies
- Antenna Design and Analysis
- Superconducting and THz Device Technology
- Metamaterials and Metasurfaces Applications
- Antenna Design and Optimization
- Terahertz technology and applications
- Radio Astronomy Observations and Technology
- Photonic and Optical Devices
- Millimeter-Wave Propagation and Modeling
- Photonic Crystals and Applications
- Radio Frequency Integrated Circuit Design
- Electromagnetic Compatibility and Measurements
- Dark Matter and Cosmic Phenomena
- Gyrotron and Vacuum Electronics Research
- Astrophysics and Cosmic Phenomena
- Plant and animal studies
- Particle physics theoretical and experimental studies
- Spectroscopy and Laser Applications
- 3D IC and TSV technologies
- Satellite Communication Systems
- Acoustic Wave Resonator Technologies
- Microwave and Dielectric Measurement Techniques
- Basque language and culture studies
- Early Modern Spanish Literature
Universidad de Navarra
2016-2025
Universidad Publica de Navarra
2015-2025
University of Michigan
2023
The University of Texas Rio Grande Valley
2022
BorgWarner (Brazil)
2018
Gobierno del Principado de Asturias
2005
We propose a novel experiment, the Canfranc Axion Detection Experiment (CADEx), to probe dark matter axions with masses in range 330-460 $\mu$eV, within W-band (80-110 GHz), an unexplored parameter space well-motivated window of Quantum ChromoDynamics (QCD) axions. The experimental design consists microwave resonant cavity haloscope high static magnetic field coupled highly sensitive detecting system based on Kinetic Inductance Detectors via optimized quasi-optics (horns and mirrors)....
The performance of an epsilon-near zero (ENZ) plano-concave lens is experimentally demonstrated and verified at the D-band millimeter-waves. comprised array narrow metallic waveguides near cut-off frequency, which effectively behaves as epsilon-near-zero medium 144 GHz. A good matching with free space achieved by exploiting phenomenon energy squeezing a clear focus transmission enhancement 15.9 dB measured. shows radiation properties directivity 17.6 dBi low cross-polar components -34 dB....
A V-band single-layer low-loss slot-array antenna is presented in this letter. Radiating slots are backed by coaxial cavities, which fed through a groove gap waveguide E-plane corporate feed network. Cavity resonances created shortening nails with respect to the surrounding ones. This fact enables compact architecture since cavities and feeding network can share same bed of nails. 16 × array designed, constructed, measured demonstrate viability concept for high-gain antennas. In addition,...
This article presents the design of a flat Luneburg metalens antenna at V-band using gap waveguide (GW) technology. The consists parallel plate (PPW) loaded with metallic pins whose height is modulated to get an effective refractive index that follows equation. A Groove GW (GGW) H-plane horn used illuminate metalens, such rays are collimated and planar wavefront generated in direction propagation. Since structure hand planar, it can be efficiently integrated on surfaces. Moreover, fully...
Today, telecommunication satellite horn antennas are required to be wideband mainly because of the additional bandwidth necessary accommodate more transponders increase capacity new services. In this aspect, play a key role in development wider services on board satellites now-a-days, with recent advances orthomode junctions and transducers, they usually limiting component antenna as often low crosspolar level is toughest specification parameter. paper, design guidelines for that combine...
The experimental validation of a Ku-band dual-circularly polarized (CP) broadside-beam metasurface (MTS) antenna is presented. A radially modulated anisotropic single-layer MTS has been synthesised employing subwavelength elliptical slotted metallic patches printed on top thin Arlon grounded substrate. In the structure, two decoupled phase-matched transverse magnetic and electric surface waves (SWs) are excited, which interact with leading to CP broadside radiation. Two different orthomode...
In this work, a study of the performance several antennas and components, manufactured using an accurate stereolithography three-dimensional printer resin for maximum accuracy detail, is carried out. Electroless plating components to cover pieces with thick copper layer improve their mechanical resistance undertaken. Several SatCom horn are designed, manufactured, tested. A detailed spline antenna filter covered. These results compared metallic lathe versions. Conclusions derived from these...
A new concept of a really compact corrugated horn antenna for global coverage with very low sidelobe and cross-polar level quite wide bandwidth is presented in this letter. This consists on the concatenation choke together Gaussian profile antenna. comparison performances design versus other author designs included. prototype was manufactured measured results demonstrate excellent agreement theoretical simulations.
A novel photonic-assisted 2-D Terahertz beam steering chip using only two tuning elements is presented. The based on an array of three leaky wave antennas (LWAs) with a monolithically integrated beamforming network (BFN) 50 µm-thick indium phosphide substrate. THz angle in elevation ( E -plane) controlled via optical frequency tunable dual-wavelength laser. An delay line used for azimuth H control. simulated scanning range 92° sweep from 0.23 to 0.33 and 69.18° time 3.6 ps. For the 0.26 0.32...
An innovative kind of corrugated horn antenna is proposed within this letter, the profile based on combination horizontal and vertical corrugations. The main advantage these profiles possibility combining high-gain with short profiles, meanwhile keeping performances conventional horns. Besides, results in an easier manufacture process due to their smaller size eliminates difficulties deep lambda/2 corrugations at throat classical profiles. example a 24 dB gain, -35 maximum crosspolar,...
Improving the <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">$G/T_{s}$</tex> </formula> of radio telescopes and radiometers their associated receive subsystems translates into increasing ground received signal-to-noise ratios. Therefore, low noise amplification with cooling operation is required. However, system designer must select an appropriate feedhorn antenna sidelobes adapted illumination at...
Abstract At the expense of frequency narrowing, binary amplitude-only diffractive optical elements emulate refractive lenses without need large profiles. Unfortunately, they also present larger Fresnel reflection loss than conventional lenses. This is usually tackled by implementing unattractive cumbersome designs. Here we demonstrate that simplicity not at odds with performance and show how fishnet metamaterial can improve radiation pattern a Soret lens. The building block this advanced...
Applying the Pancharatnam–Berry (PB) principle to half-wave plate (HWP) metasurfaces allows manipulation of wavefronts along with conversion handedness circularly polarized incident waves by simply rotating meta-atoms that compose metasurface. PB (PBM) working in transmission mode four or more layers have been demonstrated reach levels efficiency near 100% but also resulted bulky structures. On other hand, compact tri-layer ultrathin (λ/8) designs reached 90% are challenging than single-...
A new horn antenna profile is presented. This based on Gaussian techniques offers the best solution when requirements related to radiation pattern are very stringent. Short-horn antennas with high-conversion efficiency a fundamental beam, and therefore, low sidelobe cross-pol levels in wide-frequency band, could be obtained by using design technique presented here. Once theoretical principles of profiled (GPHA) presented, some other possibilities involving profiles studied compared their...
The design of a multi-functional antenna based on meta-surfaces is investigated. proposed structure consists wideband dipole located between two working in different frequency bands. result an with enhanced gain that radiates half-space at each band. A prototype composed elliptical and formed by grids cut continuous wires demonstrates the discriminates radiation half-spaces, as well increases nearly omnidirectional to values 8.9 dBi 7.7 for top bottom respectively. Moreover, remains planar...
A combination of gap waveguide technology and the traditional coplanar is studied in detail demonstrated experimentally for first time. This novel metamaterial transmission line presented three different configurations offers a broadband operation, low loss, dispersion characteristics. Analytical expressions its characteristic impedance effective permittivity are provided validated by Finite Element Method simulations. The loss analyzed with an Eigenmode solver. proposed prevents propagation...
Nowadays, an increasing number of applications need stable radiation patterns with low sidelobes and crosspolar levels in a very wide bandwidth. Gaussian profiled horn antennas (GPRAs) have demonstrated their feasibility as one the best solutions. A corrugated antenna design more than 40% bandwidth is proposed. The measured radiated far field are good agreement simulated ones. results show extremely bandwidth, sidelobes, levels.
The performance of an ultrathin (thickness < 0.04 λ 0 ) metasurface superoscillatory lens (metaSOL) is experimentally demonstrated in the terahertz (THz) range. metaSOL designed using two different hexagonal unit cells to improve efficiency and properties conventional transparent–opaque zoning approach. focusing metastructure produces, at a frequency f exp = 295 GHz, sharp focal spot 8.9 away from its output surface with transversal resolution 0.52 (≈25% below limit imposed by...
In this paper, the mutual coupling between dipole antennas placed on top of a woodpile structure is experimentally investigated. The dipoles backed by substrate compared with that obtained when are dielectric and they radiate into free space. On average, 2 7 dB reduction achieved respect to case used. space also reduced in H-plane configuration case. However, E-plane slightly increases due modification radiation pattern. Imaging array applications could potentially benefit from use EBG...
In this work an overview of the different additive manufacturing techniques will be presented. Each technique compared in terms dimensional accuracy, surface roughness, and quality taking into account most suitable applications for each one. Then, two studied: (a) fast prototyping waveguide component designs using professional grade 3D printers electromagnetic validation purposes, (b) printing hardware products as a production technology printers. The first application studied with research...
In this paper we present a microstrip patch excitation technique through electromagnetical coupling in single layer able to generate broadband circularly polarized (CP) radiation. The circular polarization operation is obtained by simply adjusting the feed system dimensions without modifying radiator. proposed also has advantage of being applicable any regular polygon; case, its validated experimentally for square and an ellipse. From simulation results 3-dB axial-ratio bandwidth 100 MHz...
The design of a horn antenna based on electromagnetic band-gap structures (EBGs) and fed by evanescent fields in the containing periodic structure is presented. Such all-dielectric antennas can form compact arrays provide promising solution for millimeter, submillimeter, terahertz (THz) devices. An evanescently EBG woodpile operating at frequencies around 110 GHz presented, together with experimental simulation results an analogous scaled-up prototype Ku-band. It exhibits 9% bandwidth...