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Quevedo-Teruel, OscarORCID iD iconorcid.org/0000-0002-4900-4788
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Publications (10 of 238) Show all publications
Wang, H., Zetterström, O., Castillo Tapia, P., Mesa, F. & Quevedo-Teruel, O. (2024). Analysis of the Dispersion Diagrams of 3D Cubic Periodic Arrangements of Metallic Spheres. In: 18th European Conference on Antennas and Propagation, EuCAP 2024: . Paper presented at 18th European Conference on Antennas and Propagation, EuCAP 2024, Glasgow, United Kingdom of Great Britain and Northern Ireland, Mar 17 2024 - Mar 22 2024. Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>Analysis of the Dispersion Diagrams of 3D Cubic Periodic Arrangements of Metallic Spheres
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2024 (English)In: 18th European Conference on Antennas and Propagation, EuCAP 2024, Institute of Electrical and Electronics Engineers (IEEE) , 2024Conference paper, Published paper (Refereed)
Abstract [en]

This paper investigates the dispersion properties exhibited by three different three-dimensional (3D) periodic arrangements of metallic spheres with the following underlying lattices: simple cubic (sc), body-centered cubic (bcc) and face-centered cubic (fcc) lattice. Their Brillouin zone (BZ) and the corresponding irreducible BZ are introduced. We then examine the dispersion properties along the edges of their respective irreducible BZs. The findings demonstrate that structures with a non-sc arrangement and higher symmetry can improve design versatility while simultaneously reducing the anisotropy of the structure and broadening the operating frequency range. These advantages are beneficial for the development of 3D graded-index (GRIN) lenses.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2024
Keywords
Dispersion analysis, GRIN lenses, Irreducible Brillouin zone, Three-dimensional periodic structures
National Category
Condensed Matter Physics
Identifiers
urn:nbn:se:kth:diva-346514 (URN)10.23919/EuCAP60739.2024.10501470 (DOI)2-s2.0-85192438343 (Scopus ID)
Conference
18th European Conference on Antennas and Propagation, EuCAP 2024, Glasgow, United Kingdom of Great Britain and Northern Ireland, Mar 17 2024 - Mar 22 2024
Note

QC 20240521

Part of ISBN 978-88-31299-09-1

Available from: 2024-05-16 Created: 2024-05-16 Last updated: 2024-05-21Bibliographically approved
Zetterström, O., Fonseca, N. J. G. & Quevedo-Teruel, O. (2024). Collimating Truncated Virtual Image Lens. IEEE Transactions on Antennas and Propagation, 72(5), 3928-3937
Open this publication in new window or tab >>Collimating Truncated Virtual Image Lens
2024 (English)In: IEEE Transactions on Antennas and Propagation, ISSN 0018-926X, E-ISSN 1558-2221, Vol. 72, no 5, p. 3928-3937Article in journal (Refereed) Published
Abstract [en]

The Luneburg lens is of significant interest for microwave and optical devices due to its wide-angle focusing properties. However, the inhomogeneous refractive index of the lens is restrictive and can be difficult to realize, especially at high frequency (typically millimeter-waves and above). Here, we present an inhomogeneous lens referred to as the collimating truncated virtual image lens, which is derived as a combination of the recently proposed virtual image lens and a conventional extended hemispherical lens. We investigate the operation of the proposed lens and we demonstrate that it provides similar focusing properties as the Luneburg lens, but with a flexible refractive index profile. This flexibility can be used to alleviate the strict manufacturing constraints typically associated with the Luneburg lens. We validate the properties of the proposed lens with a demonstrator at millimeter-wave frequencies showing that an antenna based on the proposed lens can obtain similar directivity and sidelobe levels to those obtained in an ideal Luneburg lens antenna, while the proposed lens is easier to realize. The collimating truncated virtual image lens is attractive for instruments and antennas at high frequency.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2024
National Category
Telecommunications
Identifiers
urn:nbn:se:kth:diva-346249 (URN)10.1109/tap.2024.3376076 (DOI)2-s2.0-85188471669 (Scopus ID)
Funder
The European Space Agency (ESA), 4000125905/18/NL
Note

QC 20240508

Available from: 2024-05-08 Created: 2024-05-08 Last updated: 2024-05-08Bibliographically approved
Chen, M. Z., Mesa, F. & Quevedo-Teruel, O. (2024). Combined Ray-Tracing and Physical-Optics Model for Flat-Aperture PPW Lens Antennas. In: 18th European Conference on Antennas and Propagation, EuCAP 2024: . Paper presented at 18th European Conference on Antennas and Propagation, EuCAP 2024, Glasgow, United Kingdom of Great Britain and Northern Ireland, Mar 17 2024 - Mar 22 2024. Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>Combined Ray-Tracing and Physical-Optics Model for Flat-Aperture PPW Lens Antennas
2024 (English)In: 18th European Conference on Antennas and Propagation, EuCAP 2024, Institute of Electrical and Electronics Engineers (IEEE) , 2024Conference paper, Published paper (Refereed)
Abstract [en]

This paper proposes a combined ray-tracing and physical-optics model to analyze parallel-plate-waveguide lens antennas with a flat aperture. A family of rays is traced from the source to a set of target points on the lens radiating aperture, giving a description of the aperture electric field. On the basis of the physical-optics approximation, an equivalent magnetic current is then assumed and used to evaluate the far-field radiation characteristics in every direction. This numerical approach is validated by applying it to a particular planar Mikaelian lens antenna and comparing the results with those obtained using a commercial full-wave simulator.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2024
Keywords
Equivalent magnetic current, parallel-plate-waveguide lens antennas, physical optics, radiation characteristics, ray tracing
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-346530 (URN)10.23919/EuCAP60739.2024.10501522 (DOI)2-s2.0-85192488583 (Scopus ID)
Conference
18th European Conference on Antennas and Propagation, EuCAP 2024, Glasgow, United Kingdom of Great Britain and Northern Ireland, Mar 17 2024 - Mar 22 2024
Note

QC 20240520

Part of ISBN 978-88-31299-09-1

Available from: 2024-05-16 Created: 2024-05-16 Last updated: 2024-05-20Bibliographically approved
Flores-Espinosa, N., Castillo Tapia, P., Mesa, F., Viganó, M. C. & Quevedo-Teruel, O. (2024). Design of a Dielectric Lens Using a Ray-Tracing Model for Satellite Communications. In: 18th European Conference on Antennas and Propagation, EuCAP 2024: . Paper presented at 18th European Conference on Antennas and Propagation, EuCAP 2024, Glasgow, United Kingdom of Great Britain and Northern Ireland, Mar 17 2024 - Mar 22 2024. Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>Design of a Dielectric Lens Using a Ray-Tracing Model for Satellite Communications
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2024 (English)In: 18th European Conference on Antennas and Propagation, EuCAP 2024, Institute of Electrical and Electronics Engineers (IEEE) , 2024Conference paper, Published paper (Refereed)
Abstract [en]

In millimeter-wave applications, it is essential to use highly directional and steerable antennas. Phased array antennas are the most common choice, but they have restricted scanning coverage because of their effective aperture. To enhance the scanning coverage, a dielectric lens can be placed on top of the array. However, full-wave simulations require a lot of computing time to simulate this type of structure. In this work, a two-dimensional ray-tracing model has been adapted and improved to efficiently compute the radiation pattern of arrays combined with multilayered dielectric radomes for satellite communications applications. Moreover, this model can also calculate the absorption and reflection losses and the transmitted power required to comply with the regulatory mask. This model has been used to design a lens that increases the scanning range of an array while maintaining a maximum height and ensuring that it complies with the regulatory masks for satellite communications.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2024
Keywords
Array antenna, dielectric radome, lens antenna, ray tracing, satellite communications
National Category
Telecommunications
Identifiers
urn:nbn:se:kth:diva-346518 (URN)10.23919/EuCAP60739.2024.10501613 (DOI)2-s2.0-85192497077 (Scopus ID)
Conference
18th European Conference on Antennas and Propagation, EuCAP 2024, Glasgow, United Kingdom of Great Britain and Northern Ireland, Mar 17 2024 - Mar 22 2024
Note

QC 20240520

Part of ISBN 978-88-31299-09-1

Available from: 2024-05-16 Created: 2024-05-16 Last updated: 2024-05-20Bibliographically approved
Petek, M., Tobon Vasquez, J. A., Valerio, G., Mesa, F., Quevedo-Teruel, O. & Vipiana, F. (2024). Efficient Numerical Computation of Dispersion Diagrams for Glide-Symmetric Periodic Structures with a Hexagonal Lattice. In: 18th European Conference on Antennas and Propagation, EuCAP 2024: . Paper presented at 18th European Conference on Antennas and Propagation, EuCAP 2024, Glasgow, United Kingdom of Great Britain and Northern Ireland, Mar 17 2024 - Mar 22 2024. Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>Efficient Numerical Computation of Dispersion Diagrams for Glide-Symmetric Periodic Structures with a Hexagonal Lattice
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2024 (English)In: 18th European Conference on Antennas and Propagation, EuCAP 2024, Institute of Electrical and Electronics Engineers (IEEE) , 2024Conference paper, Published paper (Refereed)
Abstract [en]

In this work, we present a modeling methodology to solve the eigenvalue problem for periodic structures with a hexagonal lattice. The method is based on the previously proposed multi-modal transfer matrix method, which is a hybrid method that takes into account the coupling between the multiple modes of the ports surrounding the single unit cell. Commercial software can be used to obtain the generalized scattering parameters which are subsequently applied to set up and solve the eigenvalue problem of the periodic structure. This approach has the ability to obtain complex solutions and thus makes it possible to analyze the attenuation in the stopbands. Here, we extend the multimodal transfer matrix method to the efficient solution of the resulting eigenvalue problem for the case of a hexagonal lattice, detailing the selection of the appropriate supercells and the appropriate irreducible Brillouin zones. Two types of structures are analyzed: a mirror-symmetric structure and a glide-symmetric structure. Very good agreement is obtained with commercial software, limited to the real part of the dispersion diagrams.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2024
Keywords
eigenmode analysis, electromagnetics, glide symmetry, hexagonal lattice, metasurfaces, numerical methods, periodic structures
National Category
Other Physics Topics
Identifiers
urn:nbn:se:kth:diva-346519 (URN)10.23919/EuCAP60739.2024.10501514 (DOI)2-s2.0-85192465087 (Scopus ID)
Conference
18th European Conference on Antennas and Propagation, EuCAP 2024, Glasgow, United Kingdom of Great Britain and Northern Ireland, Mar 17 2024 - Mar 22 2024
Note

Part of proceedings ISBN: 978-88-31299-09-1

QC 20240517

Available from: 2024-05-16 Created: 2024-05-16 Last updated: 2024-05-17Bibliographically approved
Poveda-García, M., Mesa, F., Gómez-Tornero, J. L., Algaba-Brazález, A. & Quevedo-Teruel, O. (2024). Efficient Ray-Tracing Approach to Analyze Arbitrarily Shaped Leaky-Wave Antennas Embedded in Lenses. In: 18th European Conference on Antennas and Propagation, EuCAP 2024: . Paper presented at 18th European Conference on Antennas and Propagation, EuCAP 2024, Glasgow, United Kingdom of Great Britain and Northern Ireland, Mar 17 2024 - Mar 22 2024. Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>Efficient Ray-Tracing Approach to Analyze Arbitrarily Shaped Leaky-Wave Antennas Embedded in Lenses
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2024 (English)In: 18th European Conference on Antennas and Propagation, EuCAP 2024, Institute of Electrical and Electronics Engineers (IEEE) , 2024Conference paper, Published paper (Refereed)
Abstract [en]

This paper introduces a computationally efficient ray-tracing approach to study the radiation pattern of a leaky-wave antenna embedded in a lens with an arbitrary shape. The ray-tracing technique, based on geometrical optics, is used to calculate the phase and amplitude of the fields at the lens aperture, taking into account reflections due to the transition from the lens to the free space. To validate the results, the radiation patterns obtained in some examples are compared with full-wave simulations, demonstrating a considerable time reduction in the analysis of up to 99.6% in some cases.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2024
Keywords
6G, Antenna far-field analysis, geometrical optics, leaky-wave antennas, lenses, ray tracing
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-346522 (URN)10.23919/EuCAP60739.2024.10501214 (DOI)2-s2.0-85192492835 (Scopus ID)
Conference
18th European Conference on Antennas and Propagation, EuCAP 2024, Glasgow, United Kingdom of Great Britain and Northern Ireland, Mar 17 2024 - Mar 22 2024
Note

Part of proceedings ISBN: 978-88-31299-09-1

QC 20240517

Available from: 2024-05-16 Created: 2024-05-16 Last updated: 2024-05-17Bibliographically approved
Pubill-Font, M., Mesa, F., Algaba-Brazález, A., Johansson, M., Manholm, L., Castillo Tapia, P., . . . Quevedo-Teruel, O. (2024). Efficient Ray-Tracing Model for Generalized 2D Dielectric Lenses Combined with Arrays. In: 18th European Conference on Antennas and Propagation, EuCAP 2024: . Paper presented at 18th European Conference on Antennas and Propagation, EuCAP 2024, Glasgow, United Kingdom of Great Britain and Northern Ireland, Mar 17 2024 - Mar 22 2024. Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>Efficient Ray-Tracing Model for Generalized 2D Dielectric Lenses Combined with Arrays
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2024 (English)In: 18th European Conference on Antennas and Propagation, EuCAP 2024, Institute of Electrical and Electronics Engineers (IEEE) , 2024Conference paper, Published paper (Refereed)
Abstract [en]

In this paper a simple and efficient ray-tracing model is presented to evaluate two-dimensional (2D) multilayer dielectric lenses combined with arrays. The proposed algorithm is capable of accurately evaluating the reflection and absorption losses of the lens. Two examples have been simulated with the proposed algorithm and compared with a commercial full-wave simulator. We demonstrate that the proposed method provides a very good agreement with the simulations, reducing considerably the computation time, and thus offering an effective tool for design optimization.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2024
Keywords
Lenses, losses, phased array antennas, ray-tracing
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-346517 (URN)10.23919/EuCAP60739.2024.10501752 (DOI)2-s2.0-85192442292 (Scopus ID)
Conference
18th European Conference on Antennas and Propagation, EuCAP 2024, Glasgow, United Kingdom of Great Britain and Northern Ireland, Mar 17 2024 - Mar 22 2024
Note

Part of proceedings ISBN: 978-88-31299-09-1

QC 20240517

Available from: 2024-05-16 Created: 2024-05-16 Last updated: 2024-05-17Bibliographically approved
Chen, M. Z., Mesa, F. & Quevedo-Teruel, O. (2024). Experimental Validation of Ray-Tracing and Physical-Optics Model for Geodesic H-plane Horn Antennas. In: 18th European Conference on Antennas and Propagation, EuCAP 2024: . Paper presented at 18th European Conference on Antennas and Propagation, EuCAP 2024, Glasgow, United Kingdom of Great Britain and Northern Ireland, Mar 17 2024 - Mar 22 2024. Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>Experimental Validation of Ray-Tracing and Physical-Optics Model for Geodesic H-plane Horn Antennas
2024 (English)In: 18th European Conference on Antennas and Propagation, EuCAP 2024, Institute of Electrical and Electronics Engineers (IEEE) , 2024Conference paper, Published paper (Refereed)
Abstract [en]

In this contribution, we provide an experimental validation of a ray-tracing and physical-optics model for geodesic horn antennas. The proposed model employs a ray-tracing technique to obtain electric fields in the horn aperture and applies the field equivalence principle in physical optics to evaluate the three-dimensional radiation characteristics of the geodesic horn antennas. The numerical results agree well with the measurements in terms of radiation patterns in the uv-plane, the principal E- and H-plane patterns, and directivities.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2024
Keywords
Directivity, geodesic horn antennas, physical optics, radiation pattern, ray tracing
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-346516 (URN)10.23919/EuCAP60739.2024.10501471 (DOI)2-s2.0-85192442615 (Scopus ID)
Conference
18th European Conference on Antennas and Propagation, EuCAP 2024, Glasgow, United Kingdom of Great Britain and Northern Ireland, Mar 17 2024 - Mar 22 2024
Note

QC 20240521

Part of ISBN 978-883129909-1

Available from: 2024-05-16 Created: 2024-05-16 Last updated: 2024-05-21Bibliographically approved
Zetterström, O., Mesa, F. & Quevedo-Teruel, O. (2024). Higher Symmetries in Hexagonal Periodic Structures. In: 18th European Conference on Antennas and Propagation, EuCAP 2024: . Paper presented at 18th European Conference on Antennas and Propagation, EuCAP 2024, Glasgow, United Kingdom of Great Britain and Northern Ireland, Mar 17 2024 - Mar 22 2024. Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>Higher Symmetries in Hexagonal Periodic Structures
2024 (English)In: 18th European Conference on Antennas and Propagation, EuCAP 2024, Institute of Electrical and Electronics Engineers (IEEE) , 2024Conference paper, Published paper (Refereed)
Abstract [en]

We study higher-symmetric periodic structures with hexagonal lattice arrangement. We define three ways to synthesize a glide symmetry in a hexagonal lattice. If the periodic motifs have sufficient symmetry, the three resulting structures are related through a rotation. Furthermore, we define two ways of synthesizing a mirrored half-turn symmetry in a hexagonal lattice. Again, if the periodic motifs have sufficient symmetry, the two resulting structures are related through a rotation. We analyze a structure with mirrored half-turn symmetry and compare its response to that of a periodic structure with conventional hexagonal symmetry. The mirrored half-turn-symmetric structure provides a higher effective refractive index for the same geometrical dimensional. As a result, the higher-symmetric structure is useful for devices in future wireless applications.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2024
Keywords
Hexagonal lattice, higher symmetry, periodic structures
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-346523 (URN)10.23919/EuCAP60739.2024.10501398 (DOI)2-s2.0-85192469845 (Scopus ID)978-88-31299-09-1 (ISBN)
Conference
18th European Conference on Antennas and Propagation, EuCAP 2024, Glasgow, United Kingdom of Great Britain and Northern Ireland, Mar 17 2024 - Mar 22 2024
Note

QC 20240521

Part of ISBN 978-88-31299-09-1

Available from: 2024-05-16 Created: 2024-05-16 Last updated: 2024-05-21Bibliographically approved
Rico-Fernández, J., Castillo Tapia, P., Clendinning, S., Chen, Q. & Quevedo-Teruel, O. (2024). Metal-Only Additive-Manufactured Geodesic Lens Antennas for the mmWave Band. In: 18th European Conference on Antennas and Propagation, EuCAP 2024: . Paper presented at 18th European Conference on Antennas and Propagation, EuCAP 2024, Glasgow, United Kingdom of Great Britain and Northern Ireland, Mar 17 2024 - Mar 22 2024. Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>Metal-Only Additive-Manufactured Geodesic Lens Antennas for the mmWave Band
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2024 (English)In: 18th European Conference on Antennas and Propagation, EuCAP 2024, Institute of Electrical and Electronics Engineers (IEEE) , 2024Conference paper, Published paper (Refereed)
Abstract [en]

This paper evaluates the suitability of additive manufacturing, with AlSi10Mg using the Laser Powder-Bed Fusion (LPBF) technique, for geodesic lens antennas. This evaluation is carried out with three different geodesic lens antennas operating in Ka- V- and G-band. In the Ka-band, an elliptically-compressed geodesic lens antenna was designed, manufactured and tested; in the V-band, the experimental results of a geodesic lens array antenna composed of four elements are shown. These two designs were manufactured monolithically to avoid leakage and misalignment between the plates. Finally, the challenges of additive manufacturing at G-band are discussed. A dual-polarized geodesic Luneburg lens antenna working at 122.5 GHz has been produced in three parts, so polishing can be carried out to reduce the surface roughness. The overall results corroborate that additive manufacturing with the LPBF technique is a promising method to produce metal-only solutions for geodesic lens antennas in the millimetre-wave regime.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2024
Keywords
Additive manufacturing, geodesic lenses, lens antenna, LPBF, mmWave
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-346531 (URN)10.23919/EuCAP60739.2024.10501520 (DOI)2-s2.0-85192480966 (Scopus ID)
Conference
18th European Conference on Antennas and Propagation, EuCAP 2024, Glasgow, United Kingdom of Great Britain and Northern Ireland, Mar 17 2024 - Mar 22 2024
Note

QC 20240520

Part of ISBN 978-883129909-1

Available from: 2024-05-16 Created: 2024-05-16 Last updated: 2024-05-20Bibliographically approved
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ORCID iD: ORCID iD iconorcid.org/0000-0002-4900-4788

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