Pub Date : 2022-07-10DOI: 10.1109/AP-S/USNC-URSI47032.2022.9886501
T. Fromenteze, M. Davy, O. Yurduseven, Yann Marie-Joseph, C. Decroze
This work deals with the analysis of the degree of coherence of electromagnetic fields propagated through structured or reverberant media. The study focuses on space-time transfer matrices associated with the excitation of spatially localized and temporally coherent waves within such type of environment. It is proposed to associate numerical techniques allowing the decomposition of the propagated fields into a set of subspaces ordered according to their degree of coherence. Finally, we show that the components associated with the propagation regimes most favorable to any practical needs can be identified to either mitigate or enhance the effect of the complex media under consideration.
{"title":"Space-time coherence processing of electromagnetic fields in complex media","authors":"T. Fromenteze, M. Davy, O. Yurduseven, Yann Marie-Joseph, C. Decroze","doi":"10.1109/AP-S/USNC-URSI47032.2022.9886501","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9886501","url":null,"abstract":"This work deals with the analysis of the degree of coherence of electromagnetic fields propagated through structured or reverberant media. The study focuses on space-time transfer matrices associated with the excitation of spatially localized and temporally coherent waves within such type of environment. It is proposed to associate numerical techniques allowing the decomposition of the propagated fields into a set of subspaces ordered according to their degree of coherence. Finally, we show that the components associated with the propagation regimes most favorable to any practical needs can be identified to either mitigate or enhance the effect of the complex media under consideration.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"65 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":"130567883","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-URSI47032.2022.9886354
Paris Ang, G. Eleftheriades
This work details the initial design of an active scattering cancellation cloak designed to hide a 3D target. Such a development is important, from a practical sense, as this method of electromagnetic cloaking has only been validated on either 2D or quasi-2D objects. The presented device is composed of an array of whip dipoles enveloping a 3D, conductive, cylindrical target. By configuring the input weights of these antennas, the array can radiate a field capable of cancelling any scattering which would arise when the target is illuminated by impinging electromagnetic waves. Initial performance evaluation is conducted in which the cloak is used to reduce the scattering of the target/cloak assembly when illuminated by a ridged horn antenna at 1.2 GHz. Overall, cloaking is found to be successfully achieved almost over the entire scan range with the greatest scattering suppression occurring within the shadow region formed behind the target.
{"title":"An Active Metasurface Cloak to Control the Scattering of a Conductive 3D Cylindrical Target","authors":"Paris Ang, G. Eleftheriades","doi":"10.1109/AP-S/USNC-URSI47032.2022.9886354","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9886354","url":null,"abstract":"This work details the initial design of an active scattering cancellation cloak designed to hide a 3D target. Such a development is important, from a practical sense, as this method of electromagnetic cloaking has only been validated on either 2D or quasi-2D objects. The presented device is composed of an array of whip dipoles enveloping a 3D, conductive, cylindrical target. By configuring the input weights of these antennas, the array can radiate a field capable of cancelling any scattering which would arise when the target is illuminated by impinging electromagnetic waves. Initial performance evaluation is conducted in which the cloak is used to reduce the scattering of the target/cloak assembly when illuminated by a ridged horn antenna at 1.2 GHz. Overall, cloaking is found to be successfully achieved almost over the entire scan range with the greatest scattering suppression occurring within the shadow region formed behind the target.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"17 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":"123337506","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-URSI47032.2022.9887221
N. Chahat, J. Sauder, Marc S. Lane, E. Decrossas, Gaurangi Gupta, P. Focardi, N. Beidleman, G. Freebury, M. Thomson, S. Tanelli
A multi-beam Ka-band deployable mesh reflector designed for the NASA’s Earth Ventures Mission named INCUS (Investigation of Convective Updrafts) is presented. It is a 1.6m diameter mesh reflector offset-fed by an array of five small horns. The 4 off-nadir horns are arranged in two rows in order to achieve the desired cross-track overlap at the 3-dB point of the antenna pattern. This solution takes advantage of the platform motion to achieve the desired scan pattern with a simple switched-horn solution. The optimization of the antenna feed location to achieve the 3dB beamwidth overlap is described and the overall reflector antenna performance is presented.
{"title":"Multi-Beam 1.6m Ka-band Deployable Mesh Reflector Antenna concept for INCUS","authors":"N. Chahat, J. Sauder, Marc S. Lane, E. Decrossas, Gaurangi Gupta, P. Focardi, N. Beidleman, G. Freebury, M. Thomson, S. Tanelli","doi":"10.1109/AP-S/USNC-URSI47032.2022.9887221","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9887221","url":null,"abstract":"A multi-beam Ka-band deployable mesh reflector designed for the NASA’s Earth Ventures Mission named INCUS (Investigation of Convective Updrafts) is presented. It is a 1.6m diameter mesh reflector offset-fed by an array of five small horns. The 4 off-nadir horns are arranged in two rows in order to achieve the desired cross-track overlap at the 3-dB point of the antenna pattern. This solution takes advantage of the platform motion to achieve the desired scan pattern with a simple switched-horn solution. The optimization of the antenna feed location to achieve the 3dB beamwidth overlap is described and the overall reflector antenna performance is presented.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"184 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":"123471532","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-URSI47032.2022.9887154
Renju Panicker, S. Suganthi
A Novel Metamaterial (MTM) property is obtained using a fractal pattern known as Inverse Hilbert. The Mu-negative(MNG) characteristics have been recovered by adopting NRW method. This MTM characteristic is studied for 2.45 GHz using FR4 epoxy as substrate. The dimension of the substrate is 30mm× 36mm × 1.6mm. This fractal metamaterial structure can be amalgamated with an optimized Microstrip antenna (MSA) for improvement in antenna parameters and can be used for RF energy harvesting.
{"title":"Inverse Hilbert Fractal- Metamaterial Rings for Microstrip Antennas and Wideband Applications","authors":"Renju Panicker, S. Suganthi","doi":"10.1109/AP-S/USNC-URSI47032.2022.9887154","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9887154","url":null,"abstract":"A Novel Metamaterial (MTM) property is obtained using a fractal pattern known as Inverse Hilbert. The Mu-negative(MNG) characteristics have been recovered by adopting NRW method. This MTM characteristic is studied for 2.45 GHz using FR4 epoxy as substrate. The dimension of the substrate is 30mm× 36mm × 1.6mm. This fractal metamaterial structure can be amalgamated with an optimized Microstrip antenna (MSA) for improvement in antenna parameters and can be used for RF energy harvesting.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"54 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":"121134016","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-URSI47032.2022.9886161
M. Barbuto, Z. Hamzavi, M. Longhi, A. Marini, A. Monti, D. Ramaccia, L. Stefanini, S. Vellucci, A. Toscano, F. Bilotti
The aim of this contribution is to review some recent applications of metasurfaces and cast them in the scenario of next-generation wireless systems. In particular, we show their potentialities in overcoming some detrimental effects presented by the environment in wireless communications, and discuss their crucial role towards the practical implementation of a smart electromagnetic environment.
{"title":"Passive and Active Metasurfaces Enabling New Functionalities for Smart EM Environments","authors":"M. Barbuto, Z. Hamzavi, M. Longhi, A. Marini, A. Monti, D. Ramaccia, L. Stefanini, S. Vellucci, A. Toscano, F. Bilotti","doi":"10.1109/AP-S/USNC-URSI47032.2022.9886161","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9886161","url":null,"abstract":"The aim of this contribution is to review some recent applications of metasurfaces and cast them in the scenario of next-generation wireless systems. In particular, we show their potentialities in overcoming some detrimental effects presented by the environment in wireless communications, and discuss their crucial role towards the practical implementation of a smart electromagnetic environment.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"57 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":"124163083","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-URSI47032.2022.9886050
Ana Đ. Ćupurdija, Pavle Z. Petrović, Olja Z. Jakovljević, Vojislava J. Janković, S. Savić, M. Ilić
A cost-effective system for detection and estimation of direction of arrival (DoA) for wireless transmitters is implemented on a software-defined radio platform (SDR), using beamforming algorithm and digitally controlled microwave switch for antenna selection. The system configuration and parameters are discussed and its detection capability is demonstrated at 2.45 GHz. The system is affordable and simple to operate and reproduce, hence it provides a robust and appealing practical educational platform.
{"title":"SDR Platform Implementation of DoA Detection Algorithm for Wireless Security Applications","authors":"Ana Đ. Ćupurdija, Pavle Z. Petrović, Olja Z. Jakovljević, Vojislava J. Janković, S. Savić, M. Ilić","doi":"10.1109/AP-S/USNC-URSI47032.2022.9886050","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9886050","url":null,"abstract":"A cost-effective system for detection and estimation of direction of arrival (DoA) for wireless transmitters is implemented on a software-defined radio platform (SDR), using beamforming algorithm and digitally controlled microwave switch for antenna selection. The system configuration and parameters are discussed and its detection capability is demonstrated at 2.45 GHz. The system is affordable and simple to operate and reproduce, hence it provides a robust and appealing practical educational platform.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"28 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":"127718027","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-URSI47032.2022.9887212
Stuart A. Long
Almost 40 years after the initial development of the dielectric resonator antenna, a large number of variations based on the original design have been proposed, and some recently integrated into modern telecommunications equipment. As a class of radiators, they have been shown to be efficient at high frequencies with relatively large bandwidths. An early history of the design and development of this antenna is presented to document the processes which led to the original innovation.
{"title":"An Early History of the Design and Development of the Dielectric Resonator Antenna","authors":"Stuart A. Long","doi":"10.1109/AP-S/USNC-URSI47032.2022.9887212","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9887212","url":null,"abstract":"Almost 40 years after the initial development of the dielectric resonator antenna, a large number of variations based on the original design have been proposed, and some recently integrated into modern telecommunications equipment. As a class of radiators, they have been shown to be efficient at high frequencies with relatively large bandwidths. An early history of the design and development of this antenna is presented to document the processes which led to the original innovation.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"30 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":"127788813","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-URSI47032.2022.9886577
D. Thalakotuna, K. Esselle, N. Y. Koli
A low cost, simple to fabricate, multi-layer printed patch antenna array that can be used as the outdoor antenna system in the 5G Millimeter wave Extender. The antenna is designed to operate in the n258 (24.25 GHz-27.5 GHz) and has a size of 2.3λx2.3λ. The antenna shows 94% efficiency with typical gain of 15.5 dBi with only a 0.6dB gain variation in the band of interest.
{"title":"A Planar Patch Antenna Array for 5G Millimeter Wave Extender","authors":"D. Thalakotuna, K. Esselle, N. Y. Koli","doi":"10.1109/AP-S/USNC-URSI47032.2022.9886577","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9886577","url":null,"abstract":"A low cost, simple to fabricate, multi-layer printed patch antenna array that can be used as the outdoor antenna system in the 5G Millimeter wave Extender. The antenna is designed to operate in the n258 (24.25 GHz-27.5 GHz) and has a size of 2.3λx2.3λ. The antenna shows 94% efficiency with typical gain of 15.5 dBi with only a 0.6dB gain variation in the band of interest.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"71 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":"126270561","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-URSI47032.2022.9886899
J. Budhu, L. Szymanski, A. Grbic
A general synthesis technique for 3D conformal metasurfaces is presented which utilizes integral equation-based modeling techniques and rapid optimization methods. The metasurfaces considered consist of conformal impedance sheets above conformal ground planes. The metasurfaces are modeled using integral equations and RWG basis functions which accu-rately account for all mutual coupling and finite dimensions. A conformal metasurface is designed in two phases: a Direct Solve phase involving the solution of the governing integral equation via the method of moments to obtain an initial design with complex-valued impedance sheets satisfying the desired far-field beam specifications, and a subsequent Optimization phase to convert the complex-valued sheets into purely reactive sheets. To accelerate this step, the metasurface is optimized using an adjoint optimization method. A metasurface with sinusoidal curvature is designed using this approach.
{"title":"Design of 3D Conformal Metasurfaces","authors":"J. Budhu, L. Szymanski, A. Grbic","doi":"10.1109/AP-S/USNC-URSI47032.2022.9886899","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9886899","url":null,"abstract":"A general synthesis technique for 3D conformal metasurfaces is presented which utilizes integral equation-based modeling techniques and rapid optimization methods. The metasurfaces considered consist of conformal impedance sheets above conformal ground planes. The metasurfaces are modeled using integral equations and RWG basis functions which accu-rately account for all mutual coupling and finite dimensions. A conformal metasurface is designed in two phases: a Direct Solve phase involving the solution of the governing integral equation via the method of moments to obtain an initial design with complex-valued impedance sheets satisfying the desired far-field beam specifications, and a subsequent Optimization phase to convert the complex-valued sheets into purely reactive sheets. To accelerate this step, the metasurface is optimized using an adjoint optimization method. A metasurface with sinusoidal curvature is designed using this approach.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"28 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":"126320540","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-URSI47032.2022.9886592
Rheyuniarto Sahlendar Asthan, A. Munir
The radiation characteristics improvement of mi-crostrip antenna affected by a defected ground structure (DGS) loaded magnetic material is presented. The antenna which is designed by microstrip technology aims to work at the center frequency of 4 GHz, whereas the magnetic material loaded into the DGS is polycrystalline Yttrium Iron Garnet (YIG). The radiation characteristics of the antenna are investigated under the incorporation of DGS-loaded magnetic material without an external magnetic bias. The investigation results are then compared with radiation characteristics of the conventional microstrip antenna. It was found that the inclusion of magnetic material could widen the axial ratio bandwidth around the center frequency up to 90% improving the circular polarization characteristic, while it maintains the working frequency and the radiation pattern.
{"title":"DGS-Loaded Magnetic Material for Radiation Characteristic Improvement of Microstrip Antenna","authors":"Rheyuniarto Sahlendar Asthan, A. Munir","doi":"10.1109/AP-S/USNC-URSI47032.2022.9886592","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9886592","url":null,"abstract":"The radiation characteristics improvement of mi-crostrip antenna affected by a defected ground structure (DGS) loaded magnetic material is presented. The antenna which is designed by microstrip technology aims to work at the center frequency of 4 GHz, whereas the magnetic material loaded into the DGS is polycrystalline Yttrium Iron Garnet (YIG). The radiation characteristics of the antenna are investigated under the incorporation of DGS-loaded magnetic material without an external magnetic bias. The investigation results are then compared with radiation characteristics of the conventional microstrip antenna. It was found that the inclusion of magnetic material could widen the axial ratio bandwidth around the center frequency up to 90% improving the circular polarization characteristic, while it maintains the working frequency and the radiation pattern.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"12 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":"126348698","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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