Pub Date : 2022-05-16DOI: 10.1109/iWAT54881.2022.9811087
Raluca Simedroni, T. Palade, E. Puschita, P. Dolea, Cristian Codau, Rares-Calin Buta, A. Pastrav
In the framework of the Alphasat Q-band propagation experiment, this paper presents a short-term statistical analysis of Q-band beacon and meteorological data for the Cluj-Napoca, Romania receiver. At the beacon frequency of 39.402 GHz the signal attenuation varies with precipitations and other tropospheric phenomena, especially when the rain rate is high. The scope of this paper is to contribute to the Q-band measurement campaign with data corresponding to a temperate-continental climate.
{"title":"Short-term Q-band Characteristics and Meteorological Data Statistical Analysis","authors":"Raluca Simedroni, T. Palade, E. Puschita, P. Dolea, Cristian Codau, Rares-Calin Buta, A. Pastrav","doi":"10.1109/iWAT54881.2022.9811087","DOIUrl":"https://doi.org/10.1109/iWAT54881.2022.9811087","url":null,"abstract":"In the framework of the Alphasat Q-band propagation experiment, this paper presents a short-term statistical analysis of Q-band beacon and meteorological data for the Cluj-Napoca, Romania receiver. At the beacon frequency of 39.402 GHz the signal attenuation varies with precipitations and other tropospheric phenomena, especially when the rain rate is high. The scope of this paper is to contribute to the Q-band measurement campaign with data corresponding to a temperate-continental climate.","PeriodicalId":106416,"journal":{"name":"2022 International Workshop on Antenna Technology (iWAT)","volume":"31 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121005353","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 : 2022-05-16DOI: 10.1109/iWAT54881.2022.9811065
H. Benchakroun, Declan O’Loughlin
Clinical trials using ten different Microwave Breast Imaging systems have been published including both academic and industrial systems. While trials with over 200 participants show promising detection results, substantial technical differences exist between the systems in terms of the antenna designs, antenna array designs and antenna performance specifications. In this work, the current state-of-the-art in operational microwave systems in terms of antennas are reviewed and preliminary limits on dimensions are identified. Gaps in understanding regarding the optimal number, configuration and performance of antennas are highlighted and future work regarding the impact of these design decisions on imaging performance identified.
{"title":"Identifying Microwave Antenna Design Limitations for Radar-based Breast Imaging","authors":"H. Benchakroun, Declan O’Loughlin","doi":"10.1109/iWAT54881.2022.9811065","DOIUrl":"https://doi.org/10.1109/iWAT54881.2022.9811065","url":null,"abstract":"Clinical trials using ten different Microwave Breast Imaging systems have been published including both academic and industrial systems. While trials with over 200 participants show promising detection results, substantial technical differences exist between the systems in terms of the antenna designs, antenna array designs and antenna performance specifications. In this work, the current state-of-the-art in operational microwave systems in terms of antennas are reviewed and preliminary limits on dimensions are identified. Gaps in understanding regarding the optimal number, configuration and performance of antennas are highlighted and future work regarding the impact of these design decisions on imaging performance identified.","PeriodicalId":106416,"journal":{"name":"2022 International Workshop on Antenna Technology (iWAT)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131452002","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 : 2022-05-16DOI: 10.1109/iWAT54881.2022.9811052
A. Othman, H. Majid, N. Shairi, A. A. Zolkefli, N. Al-Fadhali, Z. Abidin, I. Ibrahim, Z. Zakaria
The use of a switchable circle loaded dumbbell defective ground structure (DGS) for wideband isolation of a millimeter-wave (mm-wave) single pole double throw (SPDT) discrete radio frequency (RF) switch in a 5G application is discussed in this research. To examine the performance of the SPDT switch with switchable DGS, it was built and then simulated in CST Microwave Studio software. The performance of the switchable DGS was validated by fabricating and measuring the switchable DGS. As a result of the simulation and measurement, the switchable DGS has a wideband bandstop response with good attenuation (> 10 dB) and thus assisted the SPDT switch in producing usable wideband isolation with fractional bandwidth (FBW) of 15.49% at isolation levels greater than 30 dB for the 26 GHz band mm-wave. Furthermore, the SPDT switch's transmit mode exhibited low insertion loss (< 1 dB) and high return loss (> 10 dB), indicating a good allpass response.
{"title":"Millimeter-Wave SPDT Discrete Switch Design with Reconfigurable Circle Loaded Dumbbell DGS","authors":"A. Othman, H. Majid, N. Shairi, A. A. Zolkefli, N. Al-Fadhali, Z. Abidin, I. Ibrahim, Z. Zakaria","doi":"10.1109/iWAT54881.2022.9811052","DOIUrl":"https://doi.org/10.1109/iWAT54881.2022.9811052","url":null,"abstract":"The use of a switchable circle loaded dumbbell defective ground structure (DGS) for wideband isolation of a millimeter-wave (mm-wave) single pole double throw (SPDT) discrete radio frequency (RF) switch in a 5G application is discussed in this research. To examine the performance of the SPDT switch with switchable DGS, it was built and then simulated in CST Microwave Studio software. The performance of the switchable DGS was validated by fabricating and measuring the switchable DGS. As a result of the simulation and measurement, the switchable DGS has a wideband bandstop response with good attenuation (> 10 dB) and thus assisted the SPDT switch in producing usable wideband isolation with fractional bandwidth (FBW) of 15.49% at isolation levels greater than 30 dB for the 26 GHz band mm-wave. Furthermore, the SPDT switch's transmit mode exhibited low insertion loss (< 1 dB) and high return loss (> 10 dB), indicating a good allpass response.","PeriodicalId":106416,"journal":{"name":"2022 International Workshop on Antenna Technology (iWAT)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130981605","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 : 2022-05-16DOI: 10.1109/iWAT54881.2022.9811007
X. Begaud, Anne Claire Lepage, O. Rance, M. Soiron, A. Barka, S. Laybros
This contribution presents the realization and measurement of a metamaterial absorber first designed with RF materials and replaced by structural composite materials, i.e. fiber reinforced. First, the optimization of the absorbing material took into account the electrical characteristics of the materials compatible with the targeted application. In a second step, it was necessary to optimize the whole again to take into account the process constraints, in particular the thickness of the composite ply combining fiber and resin. After measurement, this absorbing material has a magnitude of the reflection coefficient at normal incidence less than - 13.2 dB from 5.2 GHz to 18 GHz, for a total thickness of 8.9 mm.
{"title":"Realization and measurement of a wideband metamaterial absorber composed with structural composite materials","authors":"X. Begaud, Anne Claire Lepage, O. Rance, M. Soiron, A. Barka, S. Laybros","doi":"10.1109/iWAT54881.2022.9811007","DOIUrl":"https://doi.org/10.1109/iWAT54881.2022.9811007","url":null,"abstract":"This contribution presents the realization and measurement of a metamaterial absorber first designed with RF materials and replaced by structural composite materials, i.e. fiber reinforced. First, the optimization of the absorbing material took into account the electrical characteristics of the materials compatible with the targeted application. In a second step, it was necessary to optimize the whole again to take into account the process constraints, in particular the thickness of the composite ply combining fiber and resin. After measurement, this absorbing material has a magnitude of the reflection coefficient at normal incidence less than - 13.2 dB from 5.2 GHz to 18 GHz, for a total thickness of 8.9 mm.","PeriodicalId":106416,"journal":{"name":"2022 International Workshop on Antenna Technology (iWAT)","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133277437","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 : 2022-05-16DOI: 10.1109/iWAT54881.2022.9811005
Isam Eddine Lamri, Sarosh Ahmad, E. Ali, M. Belattar, M. Dalarsson, Mohammad Alibakhshikenari
In this paper, we propose four elements proximity-coupled multi-input-multi-output (MIMO) micro-strip patch antenna working from 27 to 29.16 GHz for 28 GHz mm-wave 5G applications. We begin with the development of a single element, which is made of two layers of Rogers RT5880 substrate with a relative permittivity of 2.2. A parametric analysis, based on finite difference time domain analysis (FDTD), is conducted to boost the structure’s performance. A quad-element arrangement is examined for the MIMO antenna. Additionally, the isolation is improved by using the spatial diversity approach, which achieves better than 24 dB of isolation over the targeted frequency spectrum. The envelope correlation coefficient (ECC) and the diversity gain (DG) are determined to be within acceptable bounds. The results indicate that the design is an interesting candidate for upcoming mm-wave 5G MIMO applications.
{"title":"Four-Elements Proximity Coupled MIMO Antenna for mm-wave 5G Applications","authors":"Isam Eddine Lamri, Sarosh Ahmad, E. Ali, M. Belattar, M. Dalarsson, Mohammad Alibakhshikenari","doi":"10.1109/iWAT54881.2022.9811005","DOIUrl":"https://doi.org/10.1109/iWAT54881.2022.9811005","url":null,"abstract":"In this paper, we propose four elements proximity-coupled multi-input-multi-output (MIMO) micro-strip patch antenna working from 27 to 29.16 GHz for 28 GHz mm-wave 5G applications. We begin with the development of a single element, which is made of two layers of Rogers RT5880 substrate with a relative permittivity of 2.2. A parametric analysis, based on finite difference time domain analysis (FDTD), is conducted to boost the structure’s performance. A quad-element arrangement is examined for the MIMO antenna. Additionally, the isolation is improved by using the spatial diversity approach, which achieves better than 24 dB of isolation over the targeted frequency spectrum. The envelope correlation coefficient (ECC) and the diversity gain (DG) are determined to be within acceptable bounds. The results indicate that the design is an interesting candidate for upcoming mm-wave 5G MIMO applications.","PeriodicalId":106416,"journal":{"name":"2022 International Workshop on Antenna Technology (iWAT)","volume":"86 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130327043","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 : 2022-05-16DOI: 10.1109/iWAT54881.2022.9811022
Igor Grigoriev, I. Munina
The lenses with a gradient refractive index become the alternative to the traditional homogeneous dielectric lenses. It can be fabricated using additive manufacturing. Some of the types of the lens support the multibeam operation or beam scanning capability by placing several feed antennas to the focal surface. In comparison with the Luneburg lens, in which the feeds are placed on a spherical focal surface, the truncated Gutman lens allows to avoid conformal antenna placement and used the planar structure of the feed antennas. In this paper, the influence of the truncation on the Gutman lens performance for a multibeam application is considered based on full-wave electromagnetic simulation. The approaches for Gutman lens design using 3D printing are proposed.
{"title":"Multibeam Truncated Gutman Lens based on Additive Manufacturing","authors":"Igor Grigoriev, I. Munina","doi":"10.1109/iWAT54881.2022.9811022","DOIUrl":"https://doi.org/10.1109/iWAT54881.2022.9811022","url":null,"abstract":"The lenses with a gradient refractive index become the alternative to the traditional homogeneous dielectric lenses. It can be fabricated using additive manufacturing. Some of the types of the lens support the multibeam operation or beam scanning capability by placing several feed antennas to the focal surface. In comparison with the Luneburg lens, in which the feeds are placed on a spherical focal surface, the truncated Gutman lens allows to avoid conformal antenna placement and used the planar structure of the feed antennas. In this paper, the influence of the truncation on the Gutman lens performance for a multibeam application is considered based on full-wave electromagnetic simulation. The approaches for Gutman lens design using 3D printing are proposed.","PeriodicalId":106416,"journal":{"name":"2022 International Workshop on Antenna Technology (iWAT)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134519595","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 : 2022-05-16DOI: 10.1109/iWAT54881.2022.9810914
V. Fusco, G. G. Machado, R. Cahill, G. Conway
In this paper, we will present recent work at QUB in the area of ink-jet printed absorbers with applications in electromagnetic compatibility and spectral response control. A radio frequency (RF) enhanced spacecraft multi-layer insulator (MLI) was engineered by patterning its outermost layer using a resistively loaded hexagonal patch FSS. The structure ranges in thickness between λ/213 − λ/25 and absorbs unwanted reflections to decouple onboard antennas from the spacecraft’s structure. In addition, we also show the design of an antenna superstrate absorber designed for radar cross-section (RCS) reduction. The new antenna arrangement is capable of beam steering, preserving its beam shape when compared to the reference antenna, whilst reducing the RCS by 10 dB over a wide frequency range.
{"title":"Metamaterial absorber using conventional inkjet-printing technology applied to antennas","authors":"V. Fusco, G. G. Machado, R. Cahill, G. Conway","doi":"10.1109/iWAT54881.2022.9810914","DOIUrl":"https://doi.org/10.1109/iWAT54881.2022.9810914","url":null,"abstract":"In this paper, we will present recent work at QUB in the area of ink-jet printed absorbers with applications in electromagnetic compatibility and spectral response control. A radio frequency (RF) enhanced spacecraft multi-layer insulator (MLI) was engineered by patterning its outermost layer using a resistively loaded hexagonal patch FSS. The structure ranges in thickness between λ/213 − λ/25 and absorbs unwanted reflections to decouple onboard antennas from the spacecraft’s structure. In addition, we also show the design of an antenna superstrate absorber designed for radar cross-section (RCS) reduction. The new antenna arrangement is capable of beam steering, preserving its beam shape when compared to the reference antenna, whilst reducing the RCS by 10 dB over a wide frequency range.","PeriodicalId":106416,"journal":{"name":"2022 International Workshop on Antenna Technology (iWAT)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120953393","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 : 2022-05-16DOI: 10.1109/iWAT54881.2022.9811058
M. Hirose, T. Imai, Shengyi Wu, Satoshi Iwasaki, G. Ching, Y. Kishiki
Ray tracing parameters, that affect propagation characteristics, are great concern to improve propagation prediction in ray tracing simulation. A lot of literature reported ray tracing channel modeling with parameter tuning. Optimizing the parameters structurally was impacted on ray trace method. In this paper, an optimization system using a genetic algorithm was proposed, and system performance was evaluated by measured data.
{"title":"A Ray Tracing Parameter Optimization System in Mobile Radio Propagation Prediction","authors":"M. Hirose, T. Imai, Shengyi Wu, Satoshi Iwasaki, G. Ching, Y. Kishiki","doi":"10.1109/iWAT54881.2022.9811058","DOIUrl":"https://doi.org/10.1109/iWAT54881.2022.9811058","url":null,"abstract":"Ray tracing parameters, that affect propagation characteristics, are great concern to improve propagation prediction in ray tracing simulation. A lot of literature reported ray tracing channel modeling with parameter tuning. Optimizing the parameters structurally was impacted on ray trace method. In this paper, an optimization system using a genetic algorithm was proposed, and system performance was evaluated by measured data.","PeriodicalId":106416,"journal":{"name":"2022 International Workshop on Antenna Technology (iWAT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116325343","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 : 2022-05-16DOI: 10.1109/iWAT54881.2022.9810904
Paschalina Foti, S. Koulouridis
During the past decade, electromagnetic torso scanning systems have rapidly become remarkably popular among researchers. In this paper, we propose a wearable triangular patch antenna incorporating a Complementary Split Ring Resonator (CSRR) on the ground for pneumothorax detection. The antenna operates within the 0.49 – 1.63 GHz frequency range and has dimensions of 22mm x 18mm. The addition of the CSRR structure on the ground can significantly reduce the dimensions of the antenna. Simulation is conducted using ANSYS HFSS environment. A three-layer model of the thorax is also integrated into the design.
{"title":"Wearable Patch Antenna using Complementary Split Ring Resonator for Pneumothorax Detection","authors":"Paschalina Foti, S. Koulouridis","doi":"10.1109/iWAT54881.2022.9810904","DOIUrl":"https://doi.org/10.1109/iWAT54881.2022.9810904","url":null,"abstract":"During the past decade, electromagnetic torso scanning systems have rapidly become remarkably popular among researchers. In this paper, we propose a wearable triangular patch antenna incorporating a Complementary Split Ring Resonator (CSRR) on the ground for pneumothorax detection. The antenna operates within the 0.49 – 1.63 GHz frequency range and has dimensions of 22mm x 18mm. The addition of the CSRR structure on the ground can significantly reduce the dimensions of the antenna. Simulation is conducted using ANSYS HFSS environment. A three-layer model of the thorax is also integrated into the design.","PeriodicalId":106416,"journal":{"name":"2022 International Workshop on Antenna Technology (iWAT)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123295531","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 : 2022-05-16DOI: 10.1109/iWAT54881.2022.9811030
O. Zetterstrom, A. Algaba-Brazález, O. Quevedo–Teruel
In this contribution, planar Luneburg lens antennas are discussed. It is noted that the high radiation efficiency and wide scanning capabilities of planar Luneburg lens antennas make them attractive for the next generations of communication systems. We demonstrate that planar Luneburg lens antennas can scan in a 120 degrees range with negligible scan losses. Furthermore, a review of the reported planar Luneburg lenses is provided.
{"title":"Planar Luneburg Lens Antennas for 5G and 6G Millimetre Wave Communications","authors":"O. Zetterstrom, A. Algaba-Brazález, O. Quevedo–Teruel","doi":"10.1109/iWAT54881.2022.9811030","DOIUrl":"https://doi.org/10.1109/iWAT54881.2022.9811030","url":null,"abstract":"In this contribution, planar Luneburg lens antennas are discussed. It is noted that the high radiation efficiency and wide scanning capabilities of planar Luneburg lens antennas make them attractive for the next generations of communication systems. We demonstrate that planar Luneburg lens antennas can scan in a 120 degrees range with negligible scan losses. Furthermore, a review of the reported planar Luneburg lenses is provided.","PeriodicalId":106416,"journal":{"name":"2022 International Workshop on Antenna Technology (iWAT)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125664089","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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