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Quevedo-Teruel, OscarORCID iD iconorcid.org/0000-0002-4900-4788
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Publications (10 of 257) Show all publications
Jimenez-Suarez, J. M., Mesa, F. & Quevedo-Teruel, O. (2025). A Symmetry-Based Multimodal Transfer-Matrix Method for the Analysis of 2D-Periodic Structures. IEEE transactions on microwave theory and techniques
Open this publication in new window or tab >>A Symmetry-Based Multimodal Transfer-Matrix Method for the Analysis of 2D-Periodic Structures
2025 (English)In: IEEE transactions on microwave theory and techniques, ISSN 0018-9480, E-ISSN 1557-9670Article in journal (Refereed) Epub ahead of print
Abstract [en]

We propose a systematic and efficient extension of the multimodal transfer-matrix method to obtain the dispersion diagram of structures with 2-D periodicity specifically targeted to primitive unit cells that possess internal symmetries. When symmetry planes can be applied, the study of the unit cell can be simplified to a number of 1D-periodic scenarios that depend on the boundary conditions imposed by the symmetry planes. The study of these 1D-periodic scenarios is simpler, more accurate, and requires less computational cost. The proposed methodology has been validated with different examples of periodic structures with different lattices (squared, rectangular, and hexagonal), symmetries, and motifs. Furthermore, this approach brings about a deeper understanding of the study of the Brillouin zone (BZ) and the relationship between phase shift and paths on its irreducible Brillouin zone (IBZ).

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2025
Keywords
Periodic structures, Eigenvalues and eigenfunctions, Lattices, Electromagnetics, Dispersion, Software, Electromagnetic scattering, Boundary conditions, Shape, Search problems, Dispersion analysis, hexagonal lattice, multimodal analysis, periodic structure, scattering matrix, symmetry planes
National Category
Condensed Matter Physics Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-365282 (URN)10.1109/TMTT.2025.3554934 (DOI)001480533700001 ()2-s2.0-105004054238 (Scopus ID)
Note

QC 20250620

Available from: 2025-06-20 Created: 2025-06-20 Last updated: 2025-06-20Bibliographically approved
Clendinning, S., Zetterström, O., Rico-Fernandez, J., Mesa, F. & Quevedo-Teruel, O. (2025). Nonrotationally Symmetric V-Band Geodesic Lens Antenna with Defined Footprint. IEEE Transactions on Antennas and Propagation, 73(4), 2648-2653
Open this publication in new window or tab >>Nonrotationally Symmetric V-Band Geodesic Lens Antenna with Defined Footprint
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2025 (English)In: IEEE Transactions on Antennas and Propagation, ISSN 0018-926X, E-ISSN 1558-2221, Vol. 73, no 4, p. 2648-2653Article in journal (Refereed) Published
Abstract [en]

This communication presents a Luneburg-like geodesic lens antenna with a defined footprint operating from 60 to 70 GHz. Traditionally, geodesic lens antennas are rotationally symmetric and consequently possess a large footprint. By defining the outline of the lens footprint, the overall size of the lens can be reduced while introducing new degrees of freedom to optimize its performance. An in-house ray-tracing algorithm was used to aid the design process of the lens. In the case presented, the geometric parameters were selected for the overall port performance. A final prototype was manufactured using laser powder-bed fusion (LPBF), with measurements agreeing closely with the simulated results. The proposed antenna finds applications in future wireless communication networks.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2025
Keywords
Additive manufacturing (AM), directive antenna, fully metallic, geodesic lens, Luneburg lens
National Category
Telecommunications Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-362711 (URN)10.1109/TAP.2025.3541918 (DOI)001464463100016 ()2-s2.0-105002684168 (Scopus ID)
Note

QC 20250425

Available from: 2025-04-23 Created: 2025-04-23 Last updated: 2025-05-28Bibliographically approved
Pubill-Font, M., Mesa, F., Algaba-Brazalez, A., Clendinning, S., Johansson, M. & Quevedo-Teruel, O. (2024). 2-D Ray-Tracing Model for Multilayer Dielectric Dome Arrays With Inner Reflections. IEEE Open Journal of Antennas and Propagation, 5(4), 845-854
Open this publication in new window or tab >>2-D Ray-Tracing Model for Multilayer Dielectric Dome Arrays With Inner Reflections
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2024 (English)In: IEEE Open Journal of Antennas and Propagation, ISSN 2637-6431, Vol. 5, no 4, p. 845-854Article in journal (Refereed) Published
Abstract [en]

The application of lenses combined with array antennas (also known as dome arrays or dome antennas) to the next generation of terrestrial and satellite communication systems brings a wide range of advantages in terms of improved radiation performance, reconfigurability in the use case, and reduction in power consumption. To facilitate the industrial implementation of dome antennas, highly efficient simulation tools are required. In this paper, we present a streamlined implementation of ray tracing for fast and efficient numerical analysis of the far-field radiation performance of 2D multilayer dielectric lenses combined with phased arrays. Unlike commercial physical-optical methods, our proposed ray-tracing method is capable of computing the effects of internal reflections in the dome in a multilayer configuration. In addition, the method estimates the absorption losses as a result of the Joule effect. To demonstrate the effectiveness of the proposed approach, we provide comparisons of the simulated radiation patterns using our proposed ray tracing with the results obtained from commercial full-wave simulation tools.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2024
Keywords
Ray tracing, Lenses, Antenna arrays, Dielectrics, Apertures, Phased arrays, Antenna radiation patterns, Array antenna, absorption loss, dielectric lens, dome, matching layers, lens array, radiation pattern, reflection losses, scanning, 6G
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-352718 (URN)10.1109/OJAP.2024.3365039 (DOI)001288291400023 ()2-s2.0-85187283424 (Scopus ID)
Note

QC 20240905

Available from: 2024-09-05 Created: 2024-09-05 Last updated: 2024-09-05Bibliographically approved
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: 2024-09-30Bibliographically 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)001217104500021 ()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: 2024-07-23Bibliographically 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)001215536202179 ()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

Part of ISBN 978-88-31299-09-1, 979-8-3503-9443-6

QC 20240930

Available from: 2024-05-16 Created: 2024-05-16 Last updated: 2024-09-30Bibliographically 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)001215536203044 ()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

Part of ISBN: 978-88-31299-09-1, 979-8-3503-9443-6

QC 20240930

Available from: 2024-05-16 Created: 2024-05-16 Last updated: 2024-09-30Bibliographically approved
Wang, H., Zetterström, O., Mesa, F. & Quevedo-Teruel, O. (2024). Dispersion analysis of quasi twist-symmetric structures. In: ISAP 2024 - International Symposium on Antennas and Propagation: . Paper presented at 2024 International Symposium on Antennas and Propagation, ISAP 2024, Incheon, Korea, Nov 5 2024 - Nov 8 2024. Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>Dispersion analysis of quasi twist-symmetric structures
2024 (English)In: ISAP 2024 - International Symposium on Antennas and Propagation, Institute of Electrical and Electronics Engineers (IEEE) , 2024Conference paper, Published paper (Refereed)
Abstract [en]

We explore the dispersion properties of quasi-twist-symmetric structures using the multimode transfer-matrix method.Unlike periodic structures, these aperiodic structures do not have a translation periodicity because they are formed by translation and rotation by an angle s2π of a given subunit cell, being s an irrational number.In this work, this structure is exemplified by a pin-loaded coaxial transmission line, and it cannot be directly analyzed using commercial software due to the lack of periodicity.The results indicate that the dispersion diagrams of this kind twist-symmetric structures lie between the dispersion diagrams of periodic structures with similar rotation angles.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2024
Keywords
aperiodic structure, dispersion analysis, multimodal analysis, twist-symmetric structure
National Category
Telecommunications
Identifiers
urn:nbn:se:kth:diva-360555 (URN)10.1109/ISAP62502.2024.10846785 (DOI)2-s2.0-85218194841 (Scopus ID)
Conference
2024 International Symposium on Antennas and Propagation, ISAP 2024, Incheon, Korea, Nov 5 2024 - Nov 8 2024
Note

Part of ISBN 9798350364774

QC 20250227

Available from: 2025-02-26 Created: 2025-02-26 Last updated: 2025-02-27Bibliographically 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)001215536202171 ()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: 2024-09-23Bibliographically 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)001215536201090 ()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: 2024-09-23Bibliographically approved
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ORCID iD: ORCID iD iconorcid.org/0000-0002-4900-4788

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