Pub Date : 2022-07-10DOI: 10.1109/AP-S/USNC-URSI47032.2022.9886309
M. Phaneuf, P. Mojabi
We propose a surface-wave enabled metasurface design algorithm which uses an integral equation approach to optimize the surface waves. These surface waves are used to redistribute the power, thus increasing the range of possible field transformations when using lossless and passive omega-bianisotropic Huygens’ metasurfaces. The novelty of the approach is the ability to be applied to arbitrary metasurface shapes. The validity of the method is demonstrated for a fundamental case.
{"title":"An Integral Equation Approach to Optimize Surface Waves for Lossless and Passive Omega-Bianisotropic Huygens’ Metasurfaces","authors":"M. Phaneuf, P. Mojabi","doi":"10.1109/AP-S/USNC-URSI47032.2022.9886309","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9886309","url":null,"abstract":"We propose a surface-wave enabled metasurface design algorithm which uses an integral equation approach to optimize the surface waves. These surface waves are used to redistribute the power, thus increasing the range of possible field transformations when using lossless and passive omega-bianisotropic Huygens’ metasurfaces. The novelty of the approach is the ability to be applied to arbitrary metasurface shapes. The validity of the method is demonstrated for a fundamental case.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131554693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-10DOI: 10.1109/AP-S/USNC-URSI47032.2022.9887024
R. Cacocciola, B. Ratni, N. Mielec, E. Mimoun, S. Burokur
A bi-layered patterned phase-gradient metasurface design for refraction of normal and oblique incident waves in Ku band is proposed. A bottom-up design strategy for the metasurface’s unit-cell and super-cell is introduced and applied to design two refractive metasurfaces; one for normally incident illumination and one for obliquely incident illumination. The refraction phenomenon is validated by full-wave simulations in Ku-band at 15 GHz.
{"title":"Bi-Layered Patterned Phase-Gradient Metasurface for Refraction in Ku-Band","authors":"R. Cacocciola, B. Ratni, N. Mielec, E. Mimoun, S. Burokur","doi":"10.1109/AP-S/USNC-URSI47032.2022.9887024","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9887024","url":null,"abstract":"A bi-layered patterned phase-gradient metasurface design for refraction of normal and oblique incident waves in Ku band is proposed. A bottom-up design strategy for the metasurface’s unit-cell and super-cell is introduced and applied to design two refractive metasurfaces; one for normally incident illumination and one for obliquely incident illumination. The refraction phenomenon is validated by full-wave simulations in Ku-band at 15 GHz.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131835546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-10DOI: 10.1109/AP-S/USNC-URSI47032.2022.9887152
S. Clemens, Edmond Chong, M. Iskander, Z. Yun, Joseph Brown, T. Ray, Matthew Nakamura, Deylen Nekoba
Hybrid genetic programming (HGP) is applied to the design and optimization of a laser-induced graphene (LIG) based metasurface (MS) electromagnetic absorber. The HGP designed absorber has bandwidths of 115.4%and 56.5% for absorptivity above 70% and 80%, respectively. It is 5.1 mm thick, with a unit cell (UC) periodicity of 8.7 mm. The LIG is generated on a polyimide substrate. The MS absorber has copper ground plane backing.
{"title":"Hybrid Genetic Programming Designed Laser-Induced Graphene Based Absorber","authors":"S. Clemens, Edmond Chong, M. Iskander, Z. Yun, Joseph Brown, T. Ray, Matthew Nakamura, Deylen Nekoba","doi":"10.1109/AP-S/USNC-URSI47032.2022.9887152","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9887152","url":null,"abstract":"Hybrid genetic programming (HGP) is applied to the design and optimization of a laser-induced graphene (LIG) based metasurface (MS) electromagnetic absorber. The HGP designed absorber has bandwidths of 115.4%and 56.5% for absorptivity above 70% and 80%, respectively. It is 5.1 mm thick, with a unit cell (UC) periodicity of 8.7 mm. The LIG is generated on a polyimide substrate. The MS absorber has copper ground plane backing.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128942705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-10DOI: 10.1109/AP-S/USNC-URSI47032.2022.9887175
Yacine Sekhri, P. Grassin, M. Gaoua, H. Ouslimani
In this paper, we present a non-contact radar technique for antennas characterisation. Both monostatic and bistatic radar configurations are used. By analysing the physical phenomena of the antenna backscatter with available terminal impedances, the re-radiation mode (transmission-mode) can be extracted. The calibration process eliminates contributions of both the antenna structure mode and measurement environment. In normal incidence, the transmission-mode data leads to the calculation of the antenna gain in the frequency domain. In bistatic mode, it is possible to reconstruct the far field radiation pattern of the antenna. The consistency of the results is based on the comparison of the reconstructed gain and radiation patterns based on the radar and conventional techniques obtained jointly by CST Microwave Studio numerical simulations and measurements.
{"title":"Radar Cross Section (RCS) Technique For Antennas Characterisation","authors":"Yacine Sekhri, P. Grassin, M. Gaoua, H. Ouslimani","doi":"10.1109/AP-S/USNC-URSI47032.2022.9887175","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9887175","url":null,"abstract":"In this paper, we present a non-contact radar technique for antennas characterisation. Both monostatic and bistatic radar configurations are used. By analysing the physical phenomena of the antenna backscatter with available terminal impedances, the re-radiation mode (transmission-mode) can be extracted. The calibration process eliminates contributions of both the antenna structure mode and measurement environment. In normal incidence, the transmission-mode data leads to the calculation of the antenna gain in the frequency domain. In bistatic mode, it is possible to reconstruct the far field radiation pattern of the antenna. The consistency of the results is based on the comparison of the reconstructed gain and radiation patterns based on the radar and conventional techniques obtained jointly by CST Microwave Studio numerical simulations and measurements.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130696172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-10DOI: 10.1109/AP-S/USNC-URSI47032.2022.9886529
Shi-xue Fang, S. Qu
The in-band scattering of the antenna is the superposition of the antenna mode scattering and structural mode scattering. In this paper, the scattering, resulted from the scattering sources on the edges of the array, is proved to be the main contribution to the structural mode scattering. Moreover, the antenna mode scattering of the array can be estimated through the radiation of the antenna element. Therefore, the in-band scattering cross section (SCS) can be estimated by the superposition of the estimated antenna mode and structural mode scattering. The X-band Vivaldi array antenna is fabricated and measured. The measured monostatic SCS results are in an agreement with the simulations, showing the correctness of the analysis and the effectiveness of the estimation method.
{"title":"Method to Estimate in-band Scattering Cross Section of Vivaldi Array Antenna","authors":"Shi-xue Fang, S. Qu","doi":"10.1109/AP-S/USNC-URSI47032.2022.9886529","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9886529","url":null,"abstract":"The in-band scattering of the antenna is the superposition of the antenna mode scattering and structural mode scattering. In this paper, the scattering, resulted from the scattering sources on the edges of the array, is proved to be the main contribution to the structural mode scattering. Moreover, the antenna mode scattering of the array can be estimated through the radiation of the antenna element. Therefore, the in-band scattering cross section (SCS) can be estimated by the superposition of the estimated antenna mode and structural mode scattering. The X-band Vivaldi array antenna is fabricated and measured. The measured monostatic SCS results are in an agreement with the simulations, showing the correctness of the analysis and the effectiveness of the estimation method.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125242871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-10DOI: 10.1109/AP-S/USNC-URSI47032.2022.9886546
A. Munir, Rheyuniarto Sahlendar Asthan, Haryo Dwi Prananto, F. Oktafiani
This paper deals with the design and experimental characterization of wideband discone antenna made of polylactid-acid (PLA) material using a three-dimensional (3D) printing technology. The proposed antenna is intended to have a wideband operating frequency of 700 MHz–6 GHz desirable for electromagnetic interference (EMI) sensors application. Here, the use of 3D printing technology is to realize the cone of the antenna, while the disc is implemented using a copper-sheet. To demonstrate feasibility of the proposed antenna, a conventional discone antenna made of all copper-sheets is also realized and experimentally characterized as comparison. From the characterization result, it shows that the proposed 3D-printed discone antenna has the –10 dB operating bandwidth range of more than 5.3 GHz from the frequency of 698 MHz. This measured operating bandwidth showed obviously wideband characteristics and was wider than the one of conventional discone antenna.
{"title":"Design and Characterization of PLA-based Wideband 3D-Printed Discone Antenna","authors":"A. Munir, Rheyuniarto Sahlendar Asthan, Haryo Dwi Prananto, F. Oktafiani","doi":"10.1109/AP-S/USNC-URSI47032.2022.9886546","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9886546","url":null,"abstract":"This paper deals with the design and experimental characterization of wideband discone antenna made of polylactid-acid (PLA) material using a three-dimensional (3D) printing technology. The proposed antenna is intended to have a wideband operating frequency of 700 MHz–6 GHz desirable for electromagnetic interference (EMI) sensors application. Here, the use of 3D printing technology is to realize the cone of the antenna, while the disc is implemented using a copper-sheet. To demonstrate feasibility of the proposed antenna, a conventional discone antenna made of all copper-sheets is also realized and experimentally characterized as comparison. From the characterization result, it shows that the proposed 3D-printed discone antenna has the –10 dB operating bandwidth range of more than 5.3 GHz from the frequency of 698 MHz. This measured operating bandwidth showed obviously wideband characteristics and was wider than the one of conventional discone antenna.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130865135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-10DOI: 10.1109/AP-S/USNC-URSI47032.2022.9887308
A. Yılmaz, B. MacKie-Mason, S. Cox, C. Courtney, G. Burchuk
One of the recently introduced camera-box benchmarks is used to investigate the sensitivity of radar cross section (RCS) to the wall conductivity of highly-conductive structures with voids. Simulation results show that the effect of wall conductivity varies with look angle and frequency: The object’s monostatic RCS, a function of both the housing and the void, is insensitive to the wall conductivity at angles blind to the void or frequencies where the modes in the void are below cut off. The RCS is sensitive to wall conductivity up to remarkably high values, however, at angles aware of the void and frequencies where the void supports modes; e.g., distinct differences in patterns are observed at void-aware angles at 10.24 GHz until conductivity is higher than 104 S/m. The study indicates that simulations that use the perfect-electric-conductor simplification may not accurately compute scattering from platforms containing even highly-conductive structures with voids.
{"title":"On the Sensitivity of RCS to the Wall Conductivity of Highly-Conductive Structures with Voids","authors":"A. Yılmaz, B. MacKie-Mason, S. Cox, C. Courtney, G. Burchuk","doi":"10.1109/AP-S/USNC-URSI47032.2022.9887308","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9887308","url":null,"abstract":"One of the recently introduced camera-box benchmarks is used to investigate the sensitivity of radar cross section (RCS) to the wall conductivity of highly-conductive structures with voids. Simulation results show that the effect of wall conductivity varies with look angle and frequency: The object’s monostatic RCS, a function of both the housing and the void, is insensitive to the wall conductivity at angles blind to the void or frequencies where the modes in the void are below cut off. The RCS is sensitive to wall conductivity up to remarkably high values, however, at angles aware of the void and frequencies where the void supports modes; e.g., distinct differences in patterns are observed at void-aware angles at 10.24 GHz until conductivity is higher than 104 S/m. The study indicates that simulations that use the perfect-electric-conductor simplification may not accurately compute scattering from platforms containing even highly-conductive structures with voids.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131024672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-10DOI: 10.1109/AP-S/USNC-URSI47032.2022.9887365
Kai Wang, Hailiang Zhu, Ganyu Liu, Yuwei Qiu, Jinchao Mou, G. Wei
In this paper, a near-perfect terahertz absorber is proposed. Based on the multi-layer resonances, the meta-surface has obtained absorbing rate of more than 90% from 2.7THz to 4.38THz. Since the strict center symmetry of the structure, the same absorbing rate and bandwidth can be maintained for any polarization angle. In addition, while the incident angle is 40 degrees, the structure can hold the original bandwidth, and the absorbing rate is approximately maintained above 80%.
{"title":"Broadband Terahertz Meta-surface Absorber Based on Multi-layer Resonances","authors":"Kai Wang, Hailiang Zhu, Ganyu Liu, Yuwei Qiu, Jinchao Mou, G. Wei","doi":"10.1109/AP-S/USNC-URSI47032.2022.9887365","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9887365","url":null,"abstract":"In this paper, a near-perfect terahertz absorber is proposed. Based on the multi-layer resonances, the meta-surface has obtained absorbing rate of more than 90% from 2.7THz to 4.38THz. Since the strict center symmetry of the structure, the same absorbing rate and bandwidth can be maintained for any polarization angle. In addition, while the incident angle is 40 degrees, the structure can hold the original bandwidth, and the absorbing rate is approximately maintained above 80%.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130985217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-10DOI: 10.1109/AP-S/USNC-URSI47032.2022.9886882
Yiyang Huang, H. Zahra, A. Kiyani, S. M. Abbas, S. Mukhopadhyay
In this paper, a beam-steering (BS) antenna based on reconfigurable partially reflective surface (PRS) with a wideband probe feed is proposed. The PRS and feed antenna form a Fabry-Perot resonance cavity, which leads to the improvement in the radiation characteristics of the beam. The abosrbing structure can scatter electromanetic waves propagating externally, and thus reduce the antenna radar cross section. The phase of PRS unit changes with electrical parameters of loaded diodes, thus achieving beam-steering. The beam tilting angle can be deflected to 0°, ±8° and ±16° in elevation when resonating at 5.5 GHz, and the peak gain up to 11.1 dBi is noted.
{"title":"Reconfigurable Partially Reflective Surface based Beam-Steering Antenna with RCS Reduction","authors":"Yiyang Huang, H. Zahra, A. Kiyani, S. M. Abbas, S. Mukhopadhyay","doi":"10.1109/AP-S/USNC-URSI47032.2022.9886882","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9886882","url":null,"abstract":"In this paper, a beam-steering (BS) antenna based on reconfigurable partially reflective surface (PRS) with a wideband probe feed is proposed. The PRS and feed antenna form a Fabry-Perot resonance cavity, which leads to the improvement in the radiation characteristics of the beam. The abosrbing structure can scatter electromanetic waves propagating externally, and thus reduce the antenna radar cross section. The phase of PRS unit changes with electrical parameters of loaded diodes, thus achieving beam-steering. The beam tilting angle can be deflected to 0°, ±8° and ±16° in elevation when resonating at 5.5 GHz, and the peak gain up to 11.1 dBi is noted.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130989859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-10DOI: 10.1109/AP-S/USNC-URSI47032.2022.9887209
Leandro M. Rufail, Mohamed K. Emara, A. Ashoor, Shulabh Gupta
A novel supercell concept is proposed to control the amplitude and phase of a metasurface reflector, independently for the two orthogonal polarizations, and is numerically demonstrated. The supercell concept is based on a fundamental unit cell that operates on one linear polarization only, which when spatially rotated by 90°, can be used to respond to the other orthogonal polarization. By spatially combining the unit cell and its spatially rotated version, a super cell is formed which can impart a desired reflection amplitude/phase to each of the polarizations without affecting the other.
{"title":"Metasurface Reflector with Independent Polarizations Control using a Supercell Concept","authors":"Leandro M. Rufail, Mohamed K. Emara, A. Ashoor, Shulabh Gupta","doi":"10.1109/AP-S/USNC-URSI47032.2022.9887209","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9887209","url":null,"abstract":"A novel supercell concept is proposed to control the amplitude and phase of a metasurface reflector, independently for the two orthogonal polarizations, and is numerically demonstrated. The supercell concept is based on a fundamental unit cell that operates on one linear polarization only, which when spatially rotated by 90°, can be used to respond to the other orthogonal polarization. By spatially combining the unit cell and its spatially rotated version, a super cell is formed which can impart a desired reflection amplitude/phase to each of the polarizations without affecting the other.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131108853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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