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2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science最新文献

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On the Feasibility of Using Inverse Scattering to Optimize the Design of EBG Devices 利用逆散射优化EBG器件设计的可行性研究
2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232234
R. Palmeri, T. Isernia
{"title":"On the Feasibility of Using Inverse Scattering to Optimize the Design of EBG Devices","authors":"R. Palmeri, T. Isernia","doi":"10.23919/URSIGASS49373.2020.9232234","DOIUrl":"https://doi.org/10.23919/URSIGASS49373.2020.9232234","url":null,"abstract":"In this contribution the possibility to improve the performance of EBG devices through the exploitation of inverse design strategies is investigated. The Scattering Matrix Method is adopted as design tool and the usefulness of the proposed approach is assessed in case of a 2D EBG waveguide.","PeriodicalId":438881,"journal":{"name":"2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130456639","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}
引用次数: 0
UAV based 5G Wireless Networks: A Practical Solution for Emergency Communications 基于无人机的5G无线网络:应急通信的实用解决方案
2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232188
Yuan Gao, Jiang Cao, Ping Wang, Jing Wang, Ming Zhao, Shaochi Cheng, Su Hu, Wei-dang Lu
{"title":"UAV based 5G Wireless Networks: A Practical Solution for Emergency Communications","authors":"Yuan Gao, Jiang Cao, Ping Wang, Jing Wang, Ming Zhao, Shaochi Cheng, Su Hu, Wei-dang Lu","doi":"10.23919/URSIGASS49373.2020.9232188","DOIUrl":"https://doi.org/10.23919/URSIGASS49373.2020.9232188","url":null,"abstract":"Wireless personal communication has become necessary part of our daily life. Network operators have established many 5G base stations for most residential areas, but the untraversed area such as sea, desert, high attitude area, etc. could not benefit from the high quality wireless personal communication technology, especially for the emergency use. In this work, we provide a solution for emergency use in untraversed area, based on the Unmanned Aerial Vehicle (UAV) platform, 5G could extend the service area to most areas all over the world when necessary without establishing ground based stations, providing satisfied QoS and stability.","PeriodicalId":438881,"journal":{"name":"2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134027076","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}
引用次数: 3
Model for the Estimation of Partial Burst of Ripstop Electro-Conductive Fabrics 防撕裂导电织物局部爆裂的估计模型
2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232413
J. Pantoja, J. Cristancho, J. Rodríguez, C. Rivera, F. Roman, F. Vega, C. Kasmi, Fahad Alyafei
{"title":"Model for the Estimation of Partial Burst of Ripstop Electro-Conductive Fabrics","authors":"J. Pantoja, J. Cristancho, J. Rodríguez, C. Rivera, F. Roman, F. Vega, C. Kasmi, Fahad Alyafei","doi":"10.23919/URSIGASS49373.2020.9232413","DOIUrl":"https://doi.org/10.23919/URSIGASS49373.2020.9232413","url":null,"abstract":"This paper presents the analysis of high current impulsive tests performed on electro-conductive fabrics. A ripstop conductive fabric is tested against 5.4 kA and 9.0 kA $8/ 20 mu mathrm{s}$ lightning currents. An equivalent circuit is used to represent the conductive interwoven yarns and the contact resistance between them. Using the proposed circuit and calculating the Specific Action applied at the woven sections and at the contact points, the change of phase and the loss of material on the conductive layer is described. Results show that the Specific Action can be used to estimate determined effects in materials as function of the excitation current signal.","PeriodicalId":438881,"journal":{"name":"2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134231882","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}
引用次数: 0
Study of the Doppler Spectrum of the Microwave Radar Signal Backscattered from the Water Surface at Low Incidence Angles in the Presence of a Constant Current: Experiment and Modeling 恒流条件下低入射角海面微波雷达信号后向散射的多普勒谱研究:实验与模拟
2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232433
M. Ryabkova, V. Karaev, M. Panfilova, Y. Titchenko, E. Meshkov, E. Zuikova
{"title":"Study of the Doppler Spectrum of the Microwave Radar Signal Backscattered from the Water Surface at Low Incidence Angles in the Presence of a Constant Current: Experiment and Modeling","authors":"M. Ryabkova, V. Karaev, M. Panfilova, Y. Titchenko, E. Meshkov, E. Zuikova","doi":"10.23919/URSIGASS49373.2020.9232433","DOIUrl":"https://doi.org/10.23919/URSIGASS49373.2020.9232433","url":null,"abstract":"Measurements of the water surface backscatter at low incidence angles were performed using a Ka-band Doppler radar from the bridge over the Oka river in Nizhny Novgorod in June-October of 2019. Incidence angles varied from nadir to 25° during experiments. In this paper the first results of experimental data processing are presented and the dependency of Doppler frequency shift on incidence angle and an azimuth angle are analyzed. Data acquired in the experiments can be used for validation of theoretical models. The method for the estimation of the velocity of surface current using Doppler central frequency shift is introduced and validated.","PeriodicalId":438881,"journal":{"name":"2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134368393","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}
引用次数: 1
Lightning Effects in the Ionosphere Over The Arecibo Observatory 雷西博天文台上空电离层的闪电效应
2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232366
C. D. da Silva, S. Salazar, C. Brum, P. Terra
{"title":"Lightning Effects in the Ionosphere Over The Arecibo Observatory","authors":"C. D. da Silva, S. Salazar, C. Brum, P. Terra","doi":"10.23919/URSIGASS49373.2020.9232366","DOIUrl":"https://doi.org/10.23919/URSIGASS49373.2020.9232366","url":null,"abstract":"In the last couple of decades, substantial research has been dedicated to understanding the coupling between atmospheric regions. Research on transient luminous events (TLEs) appeared and quickly intensified with the promise of TLEs serving as an optical remote sensing tool of the mesosphere and lower ionosphere. However, to date it remains challenging to obtain quantitative estimates of electron density changes in the ionospheric D region due to underlying lightning and thunderstorms. Arecibo’s incoherent scatter radar (ISR) capabilities for measuring ionospheric electron density with high resolution (300-m spatial resolution in the present study), combined with its tropical location in a region of high lightning incidence rates, indicate a potentially transformative pathway to address this problem. Through a systematic survey, we show that sudden electron density changes registered by Arecibo’s ISR during thunderstorm times are on average different than the ones happening during fair weather conditions (driven by other external factors). Electron density changes happening coincidentally with lightning activity have typical amplitudes of 10–90% between 80–90 km altitude, and in a selected number of cases can be reasonably correlated to underlying lightning activity.","PeriodicalId":438881,"journal":{"name":"2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science","volume":"233 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132894412","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}
引用次数: 0
Near-field measurement and far-field characterization of a high-gain Cassegrain antenna at 300 GHz band base on a photonics technology 基于光子学技术的300 GHz高增益卡塞格伦天线近场测量和远场特性研究
2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232141
Yusuke Tanaka, Hana Arisesa, A. Kanno, N. Sekine, Junichi Nakajima, S. Hisatake
{"title":"Near-field measurement and far-field characterization of a high-gain Cassegrain antenna at 300 GHz band base on a photonics technology","authors":"Yusuke Tanaka, Hana Arisesa, A. Kanno, N. Sekine, Junichi Nakajima, S. Hisatake","doi":"10.23919/URSIGASS49373.2020.9232141","DOIUrl":"https://doi.org/10.23919/URSIGASS49373.2020.9232141","url":null,"abstract":"Near-field antenna pattern of a Cassegrain antenna at 300 GHz was measured based on non-polarimetric electrooptic (EO) frequency down conversion technique combined with a self-heterodyne system. Measured near-field pattern of the antenna, whose diameter and designed antenna gain are 152 mm and 48 dBi, respectively, was converted to the farfield pattern to characterize the radiation pattern of the antenna. The full width at a half maximum of the antenna is obtained 0.46 deg. and 0.40 deg. for E-plane and Hplane, respectively.","PeriodicalId":438881,"journal":{"name":"2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science","volume":"169 S361","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132906251","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}
引用次数: 0
Embedded Element Patterns in Hierarchical Calibration of Large Distributed Arrays 大型分布式阵列分层校准中的嵌入元素模式
2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232295
S. Wijnholds
{"title":"Embedded Element Patterns in Hierarchical Calibration of Large Distributed Arrays","authors":"S. Wijnholds","doi":"10.23919/URSIGASS49373.2020.9232295","DOIUrl":"https://doi.org/10.23919/URSIGASS49373.2020.9232295","url":null,"abstract":"Large distributed aperture array systems like the Low Frequency Array (LOFAR) and the low-frequency component of the Square Kilometre Array (SKA-LOW) require calibration at station level and at array level. At both levels, use of a priori knowledge of the embedded element patterns (EEPs) of the antennas is needed. In this paper, I propose accuracy requirements for station calibration and absolute calibration of the synthesis array system and assess the level of detail needed in modelling of the EEPs (individual, average or isolated) to meet them.","PeriodicalId":438881,"journal":{"name":"2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133633145","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}
引用次数: 7
Ionosphere response to geomagnetic storms on 7-8 September 2017 over Kharkiv (Ukraine) 2017年9月7-8日乌克兰哈尔科夫地区电离层对地磁风暴的响应
2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232440
S. V. Katsko, L. Emelyanov, I. Domnin, L. Chernogor
{"title":"Ionosphere response to geomagnetic storms on 7-8 September 2017 over Kharkiv (Ukraine)","authors":"S. V. Katsko, L. Emelyanov, I. Domnin, L. Chernogor","doi":"10.23919/URSIGASS49373.2020.9232440","DOIUrl":"https://doi.org/10.23919/URSIGASS49373.2020.9232440","url":null,"abstract":"Response of middle latitude ionospheric F-region to two sequential geomagnetic storms on 7–8 September 2017 has been studied using the incoherent scatter radar of Institute of Ionosphere $(49.60^{circ}N, 36.30^{circ}E)$. The G3-class geomagnetic storm on 7 September and the G4-class geomagnetic storm on 8 September had close intensities. The first geomagnetic storm was accompanied by the positive disturbance during the main phase and the negative disturbance during the recovery phase. Effects of the second geomagnetic storm caused the negative disturbance. The ionosphere was characterized by a largescale variation in critical frequency $fo F2$ (from 6 to 8 MHz and from 6 to 4 MHz), F2-layer peak height $hm F2$ (by 70–80 km) and the vertical plasma drift velocity oscillations (up to 50–80 m/s).","PeriodicalId":438881,"journal":{"name":"2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127642401","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}
引用次数: 2
Development of Measurement and Modeling Procedures of Diffractive near-LOS Wireless Links 衍射近视距无线链路测量和建模方法的发展
2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232262
Santiago Pérez-Peña, Marta Castiella-Fernández, Pedro Velasco-de-la-Fuente, J. Riera, M. Burgos-García, P. García-del-Pino, L. Mendo, J. Kusuma, E. Boch
{"title":"Development of Measurement and Modeling Procedures of Diffractive near-LOS Wireless Links","authors":"Santiago Pérez-Peña, Marta Castiella-Fernández, Pedro Velasco-de-la-Fuente, J. Riera, M. Burgos-García, P. García-del-Pino, L. Mendo, J. Kusuma, E. Boch","doi":"10.23919/URSIGASS49373.2020.9232262","DOIUrl":"https://doi.org/10.23919/URSIGASS49373.2020.9232262","url":null,"abstract":"When deploying a link to provide Internet connection in rural areas it is often necessary to surpass obstacles such as mountains covered by vegetation. However, in many situations, the diffraction angle $theta$ is quite small ($theta sim 1^{circ}$), achieving near-LOS (nLOS) links, and the possibility to establish a broadband link exploiting diffraction phenomenon arises. For that matter, a measurement system capable of transmitting and capturing broadband signals has been developed. Moreover, signal processing techniques have been applied to obtain attenuation by diffraction and channel response from the captured signal. To test nLOS links, several experiments and their comparison to propagation models have been carried out.","PeriodicalId":438881,"journal":{"name":"2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science","volume":"138 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115409166","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}
引用次数: 4
An Adjusted Propagation Model for Wireless Sensor Networks in Corn Fields 玉米田无线传感器网络的调整传播模型
2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232365
A. Navarro, D. Guevara, Gerson A. Florez
{"title":"An Adjusted Propagation Model for Wireless Sensor Networks in Corn Fields","authors":"A. Navarro, D. Guevara, Gerson A. Florez","doi":"10.23919/URSIGASS49373.2020.9232365","DOIUrl":"https://doi.org/10.23919/URSIGASS49373.2020.9232365","url":null,"abstract":"In this paper, we propose some adjustment parameters for three popular propagation models typically used in vegetated environments. We validate the adjustments proposed with measurements in a small corn field typically found in Colombian farms. The proposed adjustments seem to work properly for wireless sensor networks typically used in the Internet of things for automated assisted farming in small crops.","PeriodicalId":438881,"journal":{"name":"2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115456166","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}
引用次数: 2
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