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Zetterström, O., Valerio, G., Mesa, F., Ghasemifard, F., Norgren, M. & Quevedo-Teruel, O. (2020). Dispersion Analysis of Periodically Loaded Transmission Lines with Twist Symmetry Using the Mode-Matching Technique. Applied Sciences, 10(17), Article ID 5990.
Open this publication in new window or tab >>Dispersion Analysis of Periodically Loaded Transmission Lines with Twist Symmetry Using the Mode-Matching Technique
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2020 (English)In: Applied Sciences, E-ISSN 2076-3417, Vol. 10, no 17, article id 5990Article in journal (Refereed) Published
Abstract [en]

A mode-matching formulation is presented and used to analyze the dispersion properties of twist-symmetric transmission lines. The structures are coaxial lines periodically loaded with infinitely thin screens, which are rotated with respect to each other to possess twist symmetry. The results obtained using the proposed formulation are in good agreement with those of commercial simulators. Furthermore, using the presented mode-matching formulation, it is demonstrated that the propagation characteristics in the twist-symmetric structures are linked to the scattering and coupling of the higher order modes. The physical insight offered by this analysis is valuable for the design of various electromagnetic devices, such as filters, antennas, and phase-shifters.

Place, publisher, year, edition, pages
MDPI AG, 2020
Keywords
higher symmetry, mode-matching, twist symmetry
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-283271 (URN)10.3390/app10175990 (DOI)000569664700001 ()2-s2.0-85090088891 (Scopus ID)
Note

QC 20201006

Available from: 2020-10-06 Created: 2020-10-06 Last updated: 2022-06-25Bibliographically approved
Zetterström, O., Valerio, G., Mesa, F., Ghasemifard, F., Norgren, M. & Quevedo-Teruel, O. (2020). Mode-matching Analysis of Loaded Transmission Lines with Twist Symmetries. In: Proceedings 14th European Conference on Antennas and Propagation (EuCAP): . Paper presented at 14th European Conference on Antennas and Propagation (EuCAP), MAR 15-20, 2020, Copenhagen, DENMARK. Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>Mode-matching Analysis of Loaded Transmission Lines with Twist Symmetries
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2020 (English)In: Proceedings 14th European Conference on Antennas and Propagation (EuCAP), Institute of Electrical and Electronics Engineers (IEEE) , 2020Conference paper, Published paper (Refereed)
Abstract [en]

This paper studies the propagation characteristics in twist-symmetric structures by means of a mode-matching approach. The studied structures are coaxial transmission lines periodically loaded with 1- and 3-fold twist-symmetric infinitely thin sectorial sheets. The mode-matching formulation is validated with the commercial software CST Microwave Studio. In addition, the impact of adding twist symmetry to a coaxial line on the coupling of the higher order TM modes is discussed.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2020
Series
Proceedings of the European Conference on Antennas and Propagation, ISSN 2164-3342
Keywords
Higher symmetry, mode-matching, periodic structures, twist symmetry
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-285702 (URN)10.23919/EuCAP48036.2020.9135930 (DOI)000564218703074 ()2-s2.0-85088648789 (Scopus ID)
Conference
14th European Conference on Antennas and Propagation (EuCAP), MAR 15-20, 2020, Copenhagen, DENMARK
Note

QC 20210310

Available from: 2021-03-10 Created: 2021-03-10 Last updated: 2022-06-25Bibliographically approved
Valerio, G., Ghasemifard, F., Norgren, M. & Quevedo-Teruel, O. (2019). A generalized mode-matching method for glide-symmetric structures. In: 2019 URSI International Symposium on Electromagnetic Theory, EMTS 2019: . Paper presented at 2019 URSI International Symposium on Electromagnetic Theory, EMTS 2019; San Diego; United States; 27 May 2019 through 31 May 2019. Institute of Electrical and Electronics Engineers (IEEE), Article ID 8931540.
Open this publication in new window or tab >>A generalized mode-matching method for glide-symmetric structures
2019 (English)In: 2019 URSI International Symposium on Electromagnetic Theory, EMTS 2019, Institute of Electrical and Electronics Engineers (IEEE), 2019, article id 8931540Conference paper, Published paper (Refereed)
Abstract [en]

The new discovery of the extraordinary properties of meta-surfaces possessing higher symmetries is encouraging new studies to better understand the fundamental role of the symmetry, as well as to produce efficient numerical methods for enabling a fast optimization. Here, we propose a mode matching technique to explain the operation of glide-symmetric fully-metallic surface made of holes of arbitrary shape. The mode-matching is formulated to take into account the glide symmetry of the unit cell and isolate its impact. This formulation leads to a reduction of the computational domain to a half cell, and to derive the symmetry properties of the modal fields propagating in the metasurface. Numerical results from commercial software are employed to validate our method.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2019
Keywords
Computation theory, Electric fields, Commercial software, Computational domains, Efficient numerical method, Fast optimizations, Mode matching method, Mode matching technique, Symmetric structures, Symmetry properties, Numerical methods
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-268563 (URN)10.23919/URSI-EMTS.2019.8931540 (DOI)000526054600110 ()2-s2.0-85077953943 (Scopus ID)9781946815064 (ISBN)
Conference
2019 URSI International Symposium on Electromagnetic Theory, EMTS 2019; San Diego; United States; 27 May 2019 through 31 May 2019
Note

QC 20200331 QC 20200603

Available from: 2020-03-31 Created: 2020-03-31 Last updated: 2022-06-26Bibliographically approved
Ghasemifard, F., Salcedo, A., Norgren, M. & Quevedo-Teruel, O. (2019). Mimicking Twist Symmetry Properties in Flat Structures. In: 13th European Conference on Antennas andPropagation (EUCAP): . Paper presented at 13th European Conference on Antennas and Propagation (EuCAP),MAR 31-APR 05, 2019, Krakow, Poland. Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>Mimicking Twist Symmetry Properties in Flat Structures
2019 (English)In: 13th European Conference on Antennas andPropagation (EUCAP), Institute of Electrical and Electronics Engineers (IEEE), 2019Conference paper, Published paper (Refereed)
Abstract [en]

Twist symmetry provides an additional degree of freedom to control the wave propagation in periodic structures. However, real twist-symmetric structures are cylindrical structures that have a high cost of manufacturing. In addition, they are not compatible with the available, low-cost and flat technologies, such as microstrip technology. Here, we investigate the possibility of mimicking the dispersion properties of twist symmetry in flat structures.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2019
Series
Proceedings of the European Conference on Antennas and Propagation, ISSN 2164-3342
National Category
Other Engineering and Technologies not elsewhere specified
Identifiers
urn:nbn:se:kth:diva-239136 (URN)000480384702019 ()2-s2.0-85068453025 (Scopus ID)978-8-8907-0188-7 (ISBN)
Conference
13th European Conference on Antennas and Propagation (EuCAP),MAR 31-APR 05, 2019, Krakow, Poland
Note

QC 20210915

Available from: 2018-11-16 Created: 2018-11-16 Last updated: 2024-03-18Bibliographically approved
Ghasemifard, F., Valerio, G., Norgren, M. & Quevedo-Teruel, O. (2018). Analysis of wave propagation in plasmonic holey metasurfaces with cylindrical holes. In: IET Conference Publications: . Paper presented at 12th European Conference on Antennas and Propagation, EuCAP 2018, 9 April 2018 through 13 April 2018. Institution of Engineering and Technology (CP741)
Open this publication in new window or tab >>Analysis of wave propagation in plasmonic holey metasurfaces with cylindrical holes
2018 (English)In: IET Conference Publications, Institution of Engineering and Technology , 2018, no CP741Conference paper, Published paper (Refereed)
Abstract [en]

The wave propagation along a plasmonic holey metasurface when a metallic plate is located in its proximity has been analyzed using a mode matching technique. With this analysis, we demonstrate that decreasing the distance between the metallic plate and the holey surface excites nonresonant higher order modes in the structure. Therefore, considering only the dominant mode inside the holes, as the previous simpler models assumed, is not sufficient to analyze this type of metasurfaces.

Place, publisher, year, edition, pages
Institution of Engineering and Technology, 2018
Keywords
Antenna, Dispersive analysis, Holey structure, Metasurfaces, Mode matching, Antennas, Plasmonics, Plasmons, Wave propagation, Cylindrical holes, Higher-order modes, Metallic plate, Mode matching technique, Plates (structural components)
National Category
Condensed Matter Physics
Identifiers
urn:nbn:se:kth:diva-247465 (URN)10.1049/cp.2018.1260 (DOI)2-s2.0-85057318742 (Scopus ID)
Conference
12th European Conference on Antennas and Propagation, EuCAP 2018, 9 April 2018 through 13 April 2018
Note

QC 20190405

Available from: 2019-04-05 Created: 2019-04-05 Last updated: 2022-06-26Bibliographically approved
Ghasemifard, F., Norgren, M. & Quevedo-Teruel, O. (2018). Dispersion Analysis of 2-D Glide-Symmetric Corrugated Metasurfaces Using Mode-Matching Technique. IEEE Microwave and Wireless Components Letters, 28(1), 1-3
Open this publication in new window or tab >>Dispersion Analysis of 2-D Glide-Symmetric Corrugated Metasurfaces Using Mode-Matching Technique
2018 (English)In: IEEE Microwave and Wireless Components Letters, ISSN 1531-1309, E-ISSN 1558-1764, Vol. 28, no 1, p. 1-3Article in journal (Refereed) Published
Abstract [en]

In this letter, wave propagation in 2-D doubled corrugated metasurfaces, including glide-symmetric corrugated metasurfaces, embedded in a thin parallel plate waveguide have been analyzed using the mode matching method. The general dispersion equation for propagation at different directions is derived and dispersion surfaces have been obtained for three different cases. The results are in good agreement with reference results obtained using CST Microwave Studio. Moreover, the method is accurate and computationally much faster than CST Microwave Studio and similar commercial software.

Place, publisher, year, edition, pages
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2018
Keywords
Corrugated surfaces, dispersion analysis, glide-symmetric metasurface, mode matching, planar lenses
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-222198 (URN)10.1109/LMWC.2017.2769881 (DOI)000422937500001 ()2-s2.0-85035751387 (Scopus ID)
Note

QC 20180205

Available from: 2018-02-05 Created: 2018-02-05 Last updated: 2022-06-26Bibliographically approved
Norgren, M., de Saracho, I. O. & Dalarsson, M. (2018). Perturbation Approach to Shape Reconstruction in a Rectangular Waveguide using Experimental Data. In: 2018 INTERNATIONAL APPLIED COMPUTATIONAL ELECTROMAGNETICS SOCIETY SYMPOSIUM (ACES): . Paper presented at ACES-Denver 2018; Denver; United States; 25 March 2018 through 29 March 2018. IEEE
Open this publication in new window or tab >>Perturbation Approach to Shape Reconstruction in a Rectangular Waveguide using Experimental Data
2018 (English)In: 2018 INTERNATIONAL APPLIED COMPUTATIONAL ELECTROMAGNETICS SOCIETY SYMPOSIUM (ACES), IEEE , 2018Conference paper, Published paper (Refereed)
Abstract [en]

We consider the inverse problem of reconstructing the shape of a deformation in one of the broad walls of a rectangular waveguide. Assuming a small deformation, resulting in weak scattering, the direct problem is solved using a first order perturbation approach. Hence, the inverse problem becomes linear and is formulated as an equation system for a set of expansion coefficients. The illposedness of the inverse problem is handled with regularization, by adding a penalty term which weight is determined by the L-curve method. The theory is tested on experimental reflection data, using the dominant mode of the waveguide. The reconstructed shape is in qualitative agreement with the true shape, but a detailed resolution cannot be obtained due to insufficient quality of the experimental data. Extensions and improvements of the method are discussed.

Place, publisher, year, edition, pages
IEEE, 2018
National Category
Computational Mathematics
Identifiers
urn:nbn:se:kth:diva-231641 (URN)10.23919/ROPACES.2018.8364172 (DOI)000435263000085 ()2-s2.0-85048342443 (Scopus ID)
Conference
ACES-Denver 2018; Denver; United States; 25 March 2018 through 29 March 2018
Note

QC 20180903

Available from: 2018-09-03 Created: 2018-09-03 Last updated: 2022-06-26Bibliographically approved
Ghasemifard, F., Norgren, M. & Quevedo-Teruel, O. (2018). Twist and Polar Glide Symmetries: an Additional Degree of Freedom to Control the Propagation Characteristics of Periodic Structures. Scientific Reports, 8
Open this publication in new window or tab >>Twist and Polar Glide Symmetries: an Additional Degree of Freedom to Control the Propagation Characteristics of Periodic Structures
2018 (English)In: Scientific Reports, E-ISSN 2045-2322, Vol. 8Article in journal, Editorial material (Refereed) Published
Abstract [en]

New high-frequency 5G and satellite communication systems require fully-metallic antennas and electromagnetic components. These components can be implemented with truncated versions of periodic structures. In order to achieve the desired performance of these future devices, it is of crucial importance to have a precise control of the propagation properties, i.e. the frequency dispersion behavior and stop-bands. Here, we demonstrate the potential use of higher symmetries to diminish the frequency dispersion of periodic structures and control the width of stop-bands with a new type of fully-metallic transmission line, which is loaded with holes on a twist-symmetric configuration. Simulated and experimental results confirm the intrinsic link between the propagation characteristics and the symmetries of a periodic structure. Additionally, we provide a definitive explanation of the recently discovered polar glide symmetry and its potential combination with twist symmetries to produce low-dispersive materials and reconfigurable stop-bands. The promising properties of these structures are demonstrated with a fully-metallic reconfigurable filter, which could be used for future high-frequency 5G and satellite communication systems.

National Category
Engineering and Technology
Identifiers
urn:nbn:se:kth:diva-239132 (URN)10.1038/s41598-018-29565-6 (DOI)000439805700027 ()30050140 (PubMedID)2-s2.0-85050674647 (Scopus ID)
Note

QC 20181120

Available from: 2018-11-16 Created: 2018-11-16 Last updated: 2024-03-18Bibliographically approved
Ghasemifard, F., Ebrahimpouri, M., Norgren, M. & Quevedo-Teruel, O. (2017). Mode matching analysis of two dimensional glide-symmetric corrugated metasurfaces. In: 2017 11th European Conference on Antennas and Propagation, EUCAP 2017: . Paper presented at 11th European Conference on Antennas and Propagation, EUCAP 2017, Paris, France, 19 March 2017 through 24 March 2017 (pp. 749-751). Institute of Electrical and Electronics Engineers (IEEE), Article ID 7928533.
Open this publication in new window or tab >>Mode matching analysis of two dimensional glide-symmetric corrugated metasurfaces
2017 (English)In: 2017 11th European Conference on Antennas and Propagation, EUCAP 2017, Institute of Electrical and Electronics Engineers (IEEE), 2017, p. 749-751, article id 7928533Conference paper, Published paper (Refereed)
Abstract [en]

The mode matching method for analysing two dimensional doubled corrugated metasurfaces, including glide-symmetric corrugated metasurfaces, embedded in a thin parallel plate waveguide is presented. This method is accurate, fast, and without any limitations on the parameters.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2017
Keywords
corrugated surfaces, dispersive analysis, glide symmetry, metasurface, mode matching, planar lenses
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-209637 (URN)10.23919/EuCAP.2017.7928533 (DOI)000403827300157 ()2-s2.0-85020176963 (Scopus ID)9788890701870 (ISBN)
Conference
11th European Conference on Antennas and Propagation, EUCAP 2017, Paris, France, 19 March 2017 through 24 March 2017
Note

QC 20170622

Available from: 2017-06-22 Created: 2017-06-22 Last updated: 2024-03-15Bibliographically approved
Norgren, M. (2017). On the exact solution for the eigenmodes of the tape helix. In: 2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017: . Paper presented at 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017, Montreal, Canada, 19 August 2017 through 26 August 2017 (pp. 1-4). Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>On the exact solution for the eigenmodes of the tape helix
2017 (English)In: 2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017, Institute of Electrical and Electronics Engineers (IEEE), 2017, p. 1-4Conference paper, Published paper (Refereed)
Abstract [en]

The eigenmodes of the tape helix are analysed by expanding the surface current density on the tape, or the tangential electric field in the interspacing gap, into Chebyshev polynomials. Numerical results for the dispersion relation, the surface current and the gap electric field are presented, and the two approaches are cross-verified against each other. The numerical stability as well as similarities and differences with other approaches are discussed.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2017
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-229322 (URN)10.23919/URSIGASS.2017.8105034 (DOI)000463723600084 ()2-s2.0-85046278235 (Scopus ID)9789082598704 (ISBN)
Conference
32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017, Montreal, Canada, 19 August 2017 through 26 August 2017
Note

QC 20180604

Available from: 2018-06-04 Created: 2018-06-04 Last updated: 2022-06-26Bibliographically approved
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Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-9241-8030

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