Pub Date : 2022-05-09DOI: 10.1109/mms55062.2022.9825499
Yazan Al-Alem, Y. Antar, A. Kishk
We present a comprehensive review of the recent advancements in directivity enhancement and feeding network reduction techniques. The presented techniques focus on providing a low-cost solution while maintaining high radiation efficiency. The solutions also provide physical insight to further explain the structures radiation mechanism. The provided solutions counter many challenges faced in designing mm-Wave antennas.
{"title":"Millimeter-Wave Antennas Directivity Enhancement and Feeding Network Reduction Techniques","authors":"Yazan Al-Alem, Y. Antar, A. Kishk","doi":"10.1109/mms55062.2022.9825499","DOIUrl":"https://doi.org/10.1109/mms55062.2022.9825499","url":null,"abstract":"We present a comprehensive review of the recent advancements in directivity enhancement and feeding network reduction techniques. The presented techniques focus on providing a low-cost solution while maintaining high radiation efficiency. The solutions also provide physical insight to further explain the structures radiation mechanism. The provided solutions counter many challenges faced in designing mm-Wave antennas.","PeriodicalId":124088,"journal":{"name":"2022 Microwave Mediterranean Symposium (MMS)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123027374","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 : 2022-05-09DOI: 10.1109/mms55062.2022.9825583
Jorge Teixeira, Sérgio Matos, Jorge R. Costa, J. Felício, C. Fernandes
Transmit-arrays (TAs) can be a cost-effective solution for high gain steerable antennas using millimeter waves. For some applications these antennas can be a viable alternative to the extremely compact and agile phased-arrays counterpart. The main motivation is to reduce the high costs associated with the complex and lossy feeding networks of phased arrays - a fundamental factor when aiming for mass-market technology. Combining the flexibility of TAs with 3D printing can further enhance the low-cost potential of these antennas. This work focuses on apertures composed by a single dielectric material compatible with the affordable 3D printing technique, Fuse Deposition Modelling (FDM). However, the resulting aperture will be thicker and have higher losses comparing with printed circuit board (PCB) TAs. We show that, despite these limitations, the dielectric implementation of TAs performs well even for demanding designs. We present several dielectric realizations of a TA design capable of wide mechanical beam scanning (up 49 degrees) with a low profile (F/D=0.34) and 26 dBi maximum gain at 30 GHz. We assess how the performance of this antenna is affected by the way that the T A phase correction is crafted in the dielectric block.
{"title":"Assessing different monoblock dielectric implementations of a low profile beam steering Transmitarray for 3D printing","authors":"Jorge Teixeira, Sérgio Matos, Jorge R. Costa, J. Felício, C. Fernandes","doi":"10.1109/mms55062.2022.9825583","DOIUrl":"https://doi.org/10.1109/mms55062.2022.9825583","url":null,"abstract":"Transmit-arrays (TAs) can be a cost-effective solution for high gain steerable antennas using millimeter waves. For some applications these antennas can be a viable alternative to the extremely compact and agile phased-arrays counterpart. The main motivation is to reduce the high costs associated with the complex and lossy feeding networks of phased arrays - a fundamental factor when aiming for mass-market technology. Combining the flexibility of TAs with 3D printing can further enhance the low-cost potential of these antennas. This work focuses on apertures composed by a single dielectric material compatible with the affordable 3D printing technique, Fuse Deposition Modelling (FDM). However, the resulting aperture will be thicker and have higher losses comparing with printed circuit board (PCB) TAs. We show that, despite these limitations, the dielectric implementation of TAs performs well even for demanding designs. We present several dielectric realizations of a TA design capable of wide mechanical beam scanning (up 49 degrees) with a low profile (F/D=0.34) and 26 dBi maximum gain at 30 GHz. We assess how the performance of this antenna is affected by the way that the T A phase correction is crafted in the dielectric block.","PeriodicalId":124088,"journal":{"name":"2022 Microwave Mediterranean Symposium (MMS)","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122881822","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 : 2022-05-09DOI: 10.1109/mms55062.2022.9825591
E. Agastra, Aleksander Biberaj, Olimpjon Shurdi, Bexhet Kamo, Alban Rakipi
Investigation on ultra-wide band slot-sinuous antenna for in band mono static radar cross section behaviour are performed. The possibility of using opening ellipses on the metallic patch of the slot-sinuous antenna are presented with the intent of reducing structural radar cross section on the overall frequency band. Simulated results for in-band RCS for modified slot-sinuous antenna and slot-sinuous are presented discussed. The proposed solution result as a good candidate to be further investigated on a multi-objective optimization context for in band RCS reduction.
{"title":"RCS analysis on ultra-wideband sinuous antenna with elliptical slots","authors":"E. Agastra, Aleksander Biberaj, Olimpjon Shurdi, Bexhet Kamo, Alban Rakipi","doi":"10.1109/mms55062.2022.9825591","DOIUrl":"https://doi.org/10.1109/mms55062.2022.9825591","url":null,"abstract":"Investigation on ultra-wide band slot-sinuous antenna for in band mono static radar cross section behaviour are performed. The possibility of using opening ellipses on the metallic patch of the slot-sinuous antenna are presented with the intent of reducing structural radar cross section on the overall frequency band. Simulated results for in-band RCS for modified slot-sinuous antenna and slot-sinuous are presented discussed. The proposed solution result as a good candidate to be further investigated on a multi-objective optimization context for in band RCS reduction.","PeriodicalId":124088,"journal":{"name":"2022 Microwave Mediterranean Symposium (MMS)","volume":"222 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128616242","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 : 2022-05-09DOI: 10.1109/mms55062.2022.9825576
D. Pirrone, A. Ferraro, D. Zografopoulos, P. Szriftgiser, G. Ducournau, R. Beccherelli, W. Fuscaldo
The capabilities of frequency-selective surface (FSS) as free-space filters for wireless communications in the 300 GHz band are here demonstrated experimentally. The presence of a filter plays a key role to protect wireless communications from out-of-band interference without resorting to computation intensive forward error correction schemes. An FSS filter is suitably designed to exhibit an almost linear phase and a low insertion loss over a 20 GHz bandwidth centered around 270 GHz. A method based on both full-wave simulations and numerical techniques is developed to predict the bit-error rate (BER) performance of a filter-based wireless communication when an on-off keying modulated signal is sent at 14 Gb/s. Results are corroborated through measurements and confirm that the filters marginally affect the BER within the operating bandwidth while it is capable of strongly rejecting out-of-band interferences. In future works, the performance of more elaborated filters and modulations schemes will be investigated in detail.
{"title":"High Data Rate OOK Wireless Link at 300 GHz Band through Metasurface-based Filters: Analysis, Design, and Experiment","authors":"D. Pirrone, A. Ferraro, D. Zografopoulos, P. Szriftgiser, G. Ducournau, R. Beccherelli, W. Fuscaldo","doi":"10.1109/mms55062.2022.9825576","DOIUrl":"https://doi.org/10.1109/mms55062.2022.9825576","url":null,"abstract":"The capabilities of frequency-selective surface (FSS) as free-space filters for wireless communications in the 300 GHz band are here demonstrated experimentally. The presence of a filter plays a key role to protect wireless communications from out-of-band interference without resorting to computation intensive forward error correction schemes. An FSS filter is suitably designed to exhibit an almost linear phase and a low insertion loss over a 20 GHz bandwidth centered around 270 GHz. A method based on both full-wave simulations and numerical techniques is developed to predict the bit-error rate (BER) performance of a filter-based wireless communication when an on-off keying modulated signal is sent at 14 Gb/s. Results are corroborated through measurements and confirm that the filters marginally affect the BER within the operating bandwidth while it is capable of strongly rejecting out-of-band interferences. In future works, the performance of more elaborated filters and modulations schemes will be investigated in detail.","PeriodicalId":124088,"journal":{"name":"2022 Microwave Mediterranean Symposium (MMS)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122049506","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 : 2022-05-09DOI: 10.1109/mms55062.2022.9825510
Minas Kouroublakis, N. Tsitsas, G. Fikioris
Carbon-based materials are being increasingly used in electromagnetic shielding applications substituting traditional materials such as metals. One of these materials is graphene, which is the first 2-D material created having very high surface conductivity in the RF-microwave region. In addition to extensive experimental works, many models have been also proposed to simulate graphene in the context of numerical methods. In this work, we develop a Method of Auxiliary Sources (MAS) approach to perform full-wave analysis of a cylindrical medium covered by a graphene layer. When the conventional MAS approach is followed, numerical difficulties arise when simulating graphene as a material layer due to its extremely small effective thickness, and its very high surface conductivity. To this end, a modified version of MAS is proposed where graphene is simulated as an Impedance Matrix Boundary Condition (IMBC). Numerical experiments verify the effectiveness of the MAS with IMBC the results of which showcase excellent agreement with those obtained by the Finite Element Method (FEM).
{"title":"Modeling of Cylindrical Configurations Coated by Monolayer Graphene with a Modified Method of Auxiliary Sources","authors":"Minas Kouroublakis, N. Tsitsas, G. Fikioris","doi":"10.1109/mms55062.2022.9825510","DOIUrl":"https://doi.org/10.1109/mms55062.2022.9825510","url":null,"abstract":"Carbon-based materials are being increasingly used in electromagnetic shielding applications substituting traditional materials such as metals. One of these materials is graphene, which is the first 2-D material created having very high surface conductivity in the RF-microwave region. In addition to extensive experimental works, many models have been also proposed to simulate graphene in the context of numerical methods. In this work, we develop a Method of Auxiliary Sources (MAS) approach to perform full-wave analysis of a cylindrical medium covered by a graphene layer. When the conventional MAS approach is followed, numerical difficulties arise when simulating graphene as a material layer due to its extremely small effective thickness, and its very high surface conductivity. To this end, a modified version of MAS is proposed where graphene is simulated as an Impedance Matrix Boundary Condition (IMBC). Numerical experiments verify the effectiveness of the MAS with IMBC the results of which showcase excellent agreement with those obtained by the Finite Element Method (FEM).","PeriodicalId":124088,"journal":{"name":"2022 Microwave Mediterranean Symposium (MMS)","volume":"140 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122417607","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 : 2022-05-09DOI: 10.1109/mms55062.2022.9825588
A. Sannino, M. Scarfì, S. Romeo, M. Priault, M. Dufossée, L. Poeta, V. Prouzet-Mauléon, O. Zeni
The present study aimed to determine whether autophagy contributes to radiofrequency-induced adaptive response. To this purpose, SH-SY5Y human neuroblastoma cells were exposed for 20 hours to 1950 MHz, UMTS signal, and then treated with menadione, a DNA damage inducer. The results obtained indicated a reduction of menadione-induced DNA damage in samples that were pre-exposed to radiofrequency field, as assessed by the comet assay. Such a reduction was negated when autophagy was inhibited by Bafilomycin A1 and E64d. Moreover, CRISPR SHSY-5Y cell lines defective for ATG7 or ATG5 genes also did not show adaptive response. These findings suggest the involvement of autophagy in the radiofrequency-induced adaptive response, although further investigation is required to extend such observation at molecular level.
{"title":"Possible role of autophagy in in vitro radiofrequency-induced adaptive response","authors":"A. Sannino, M. Scarfì, S. Romeo, M. Priault, M. Dufossée, L. Poeta, V. Prouzet-Mauléon, O. Zeni","doi":"10.1109/mms55062.2022.9825588","DOIUrl":"https://doi.org/10.1109/mms55062.2022.9825588","url":null,"abstract":"The present study aimed to determine whether autophagy contributes to radiofrequency-induced adaptive response. To this purpose, SH-SY5Y human neuroblastoma cells were exposed for 20 hours to 1950 MHz, UMTS signal, and then treated with menadione, a DNA damage inducer. The results obtained indicated a reduction of menadione-induced DNA damage in samples that were pre-exposed to radiofrequency field, as assessed by the comet assay. Such a reduction was negated when autophagy was inhibited by Bafilomycin A1 and E64d. Moreover, CRISPR SHSY-5Y cell lines defective for ATG7 or ATG5 genes also did not show adaptive response. These findings suggest the involvement of autophagy in the radiofrequency-induced adaptive response, although further investigation is required to extend such observation at molecular level.","PeriodicalId":124088,"journal":{"name":"2022 Microwave Mediterranean Symposium (MMS)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116250998","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 : 2022-05-09DOI: 10.1109/mms55062.2022.9825600
H. Ayadi, S. Beldi, J. Macháč, L. Latrach
A printed hexagonal antenna with double reconfigurable notched bands was presented and performed for modern wireless communication systems. The dismissed bands were obtained by etching a complementary split ring resonator (CSRR) on the original antenna layout. By placing two varactor diodes on the resonator, the discarded bands become easily controllable and tunable by varying the DC voltage of the diodes. Two wide continuous tuning ranges of 0.5 GHz and 1.1 GHz were achieved. The simulated and measured results show a good agreement.
{"title":"Printed Hexagonal Antenna with Dual Reconfigurable Wide Rejected Bands","authors":"H. Ayadi, S. Beldi, J. Macháč, L. Latrach","doi":"10.1109/mms55062.2022.9825600","DOIUrl":"https://doi.org/10.1109/mms55062.2022.9825600","url":null,"abstract":"A printed hexagonal antenna with double reconfigurable notched bands was presented and performed for modern wireless communication systems. The dismissed bands were obtained by etching a complementary split ring resonator (CSRR) on the original antenna layout. By placing two varactor diodes on the resonator, the discarded bands become easily controllable and tunable by varying the DC voltage of the diodes. Two wide continuous tuning ranges of 0.5 GHz and 1.1 GHz were achieved. The simulated and measured results show a good agreement.","PeriodicalId":124088,"journal":{"name":"2022 Microwave Mediterranean Symposium (MMS)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116023088","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 : 2022-05-09DOI: 10.1109/mms55062.2022.9825615
F. Benassi, Masood Ur Rehman, M. Jamshed, D. Masotti, A. Costanzo
Microstrip antennas are widely used for Wireless Power Transfer applications both in medical and industrial environment, however, a trade-off between performance and dimensions must be set. This article proposes an hexagonal rectenna with enhanced radiation performance. The two-layer structure accounts for an hexagonal ring antenna equipped with concentric parasitic rings, fed by a microstrip line that couples with the antenna parasitic elements in order to achieve optimum matching conditions at 2.45 GHz. The second layer, made by metallized FR-4, allows for enhancing the radiation performance of the overall structure reaching for a 20 % and more than a + 1.5 dBi increment in the antenna radiation efficiency and gain respectively, while maintaining overall small dimensions.
{"title":"A novel Hexagonal Excitation for a Multi-Layer Wearable Miniaturized Antenna","authors":"F. Benassi, Masood Ur Rehman, M. Jamshed, D. Masotti, A. Costanzo","doi":"10.1109/mms55062.2022.9825615","DOIUrl":"https://doi.org/10.1109/mms55062.2022.9825615","url":null,"abstract":"Microstrip antennas are widely used for Wireless Power Transfer applications both in medical and industrial environment, however, a trade-off between performance and dimensions must be set. This article proposes an hexagonal rectenna with enhanced radiation performance. The two-layer structure accounts for an hexagonal ring antenna equipped with concentric parasitic rings, fed by a microstrip line that couples with the antenna parasitic elements in order to achieve optimum matching conditions at 2.45 GHz. The second layer, made by metallized FR-4, allows for enhancing the radiation performance of the overall structure reaching for a 20 % and more than a + 1.5 dBi increment in the antenna radiation efficiency and gain respectively, while maintaining overall small dimensions.","PeriodicalId":124088,"journal":{"name":"2022 Microwave Mediterranean Symposium (MMS)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126043072","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}
The plane wave diffraction by a slit in a material screen is analyzed using the Wiener-Hopf technique together with generalized boundary conditions (GBC). Exact and high-frequency asymptotic solutions are obtained. The scattered field is evaluated asymptotically based on the saddle point method and a far field expression is derived. Numerical examples on the far field intensity are presented and the scattering characteristics of the slit are discussed.
{"title":"Diffraction by a Slit in a Thin Material Screen","authors":"T. Nagasaka, K. Kobayashi","doi":"10.46620/21-0044","DOIUrl":"https://doi.org/10.46620/21-0044","url":null,"abstract":"The plane wave diffraction by a slit in a material screen is analyzed using the Wiener-Hopf technique together with generalized boundary conditions (GBC). Exact and high-frequency asymptotic solutions are obtained. The scattered field is evaluated asymptotically based on the saddle point method and a far field expression is derived. Numerical examples on the far field intensity are presented and the scattering characteristics of the slit are discussed.","PeriodicalId":124088,"journal":{"name":"2022 Microwave Mediterranean Symposium (MMS)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133823827","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 : 2022-05-09DOI: 10.1109/mms55062.2022.9825529
K. Jurík, P. Drexler
This paper deals with the fabrication of different types of resonant networks and with analysis of their resonant modes. As a reference serves a standard structure of the well-known Birdcage resonator, supplemented by three resonators with the same geometry, but different resonance modes. The modes of the resonators were analysed in order to provide a universal comparison, applicable also to the original birdcage resonators. The described resonators were modelled and analysed using FEM simulation and fabricated using copper tape and lumped capacitors. Their parameters - impedance and distribution of the leg currents were evaluated. Two of three introduced resonators can be used to create a homogeneous magnetic field.
{"title":"Tubular resonant networks creating a homogeneous magnetic field via different resonance modes","authors":"K. Jurík, P. Drexler","doi":"10.1109/mms55062.2022.9825529","DOIUrl":"https://doi.org/10.1109/mms55062.2022.9825529","url":null,"abstract":"This paper deals with the fabrication of different types of resonant networks and with analysis of their resonant modes. As a reference serves a standard structure of the well-known Birdcage resonator, supplemented by three resonators with the same geometry, but different resonance modes. The modes of the resonators were analysed in order to provide a universal comparison, applicable also to the original birdcage resonators. The described resonators were modelled and analysed using FEM simulation and fabricated using copper tape and lumped capacitors. Their parameters - impedance and distribution of the leg currents were evaluated. Two of three introduced resonators can be used to create a homogeneous magnetic field.","PeriodicalId":124088,"journal":{"name":"2022 Microwave Mediterranean Symposium (MMS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134391619","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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