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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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Electromagnetic interaction with a monodispersed system in sedimentation equilibrium 沉降平衡中单分散体系的电磁相互作用
2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232326
S. Batool, L. Dinia, F. Frezza, F. Mangini, M. Nisar
{"title":"Electromagnetic interaction with a monodispersed system in sedimentation equilibrium","authors":"S. Batool, L. Dinia, F. Frezza, F. Mangini, M. Nisar","doi":"10.23919/URSIGASS49373.2020.9232326","DOIUrl":"https://doi.org/10.23919/URSIGASS49373.2020.9232326","url":null,"abstract":"In this paper, a new model to explain the electromagnetic interaction with a monodispersed system in sedimentation equilibrium is presented. Our approach is based on the dispersive system as constituted by a large number of stratification each characterized a constant particle concentration. The interaction between the electromagnetic field and the stratified material is taken into consideration thanks to the T-matrix approach. The concentration of these media varies with continuity along the stratified direction. A host medium constitutes each layer, and it is also assumed to be identical for all layers in which some nano-spherical objects are immersed. Thanks to these hypotheses, the homogenization mixing formula has been taking into account. The reached results show the behavior of the stratified medium as a function of the density for the spherical hosted object and as a function of angular incident direction.","PeriodicalId":438881,"journal":{"name":"2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science","volume":"221 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":"122875835","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
Solar radio emission surveillance by the Trieste Solar Radio System 2.0 的里雅斯特太阳无线电系统2.0的太阳无线电发射监测
2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232417
G. Jerse, V. Alberti, M. Molinaro, V. Baldini, R. Cirami, I. Coretti, P. D. Marcantonio, M. Messerotti
{"title":"Solar radio emission surveillance by the Trieste Solar Radio System 2.0","authors":"G. Jerse, V. Alberti, M. Molinaro, V. Baldini, R. Cirami, I. Coretti, P. D. Marcantonio, M. Messerotti","doi":"10.23919/URSIGASS49373.2020.9232417","DOIUrl":"https://doi.org/10.23919/URSIGASS49373.2020.9232417","url":null,"abstract":"In this paper we describe the Trieste Solar Radio System 2.0 (TSRS 2.0), a project for a new facility dedicated to the continuous surveillance of the solar radio emission in the range 1-19 GHz. It is presently under development at the INAF Astronomical Observatory of Trieste and will be installed at the Basovizza Observing Station. TSRS 2.0 will be constituted by a three-meter parabolic antenna with an LHCP and RHCP large-bandwidth feeder, a receiver with high resolution digitizer, a high dynamic detector, a fully-sky coverage, alt-az motorized mount and an imaging and control software with tracking options. In this paper we focus on the TSRS main operational features, its science goals, observation modes and data products. Thanks to its peculiar and unique operational capabilities, TSRS will be an interesting diagnostic tool and will play a fundamental role in the Solar Radio Weather framework, contributing to detection, monitoring, newcasting, forecasting, modelling and scientific investigation of radio solar emission and its effects on ground based infrastructures via radio interferences.","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":"131355843","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
Phase Compensation Method for Active Phased Array Antennas in Operating Environment based on Electromechanical Coupling Model 基于机电耦合模型的有源相控阵天线工作环境相位补偿方法
2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232134
Yan Wang, Congsi Wang, Yuefei Yan, Jun Tian, Jing Liu, Cheng Zhou, Zhihai Wang, Kunpeng Yu, Qian Xu
{"title":"Phase Compensation Method for Active Phased Array Antennas in Operating Environment based on Electromechanical Coupling Model","authors":"Yan Wang, Congsi Wang, Yuefei Yan, Jun Tian, Jing Liu, Cheng Zhou, Zhihai Wang, Kunpeng Yu, Qian Xu","doi":"10.23919/URSIGASS49373.2020.9232134","DOIUrl":"https://doi.org/10.23919/URSIGASS49373.2020.9232134","url":null,"abstract":"Complex operating environmental loads lead to structure deformation of active phased array antennas (APAA), which could finally seriously degrade the electromagnetic performance of antennas. Based on the electromechanical coupling model of APAA, the phase compensation method is applied to recover the electromagnetic performance of the deformed antenna to the ideal performance as much as possible, where the excitation phase adjustment quantity of element is derived, and the application range of the method is discussed. Finally, the effectiveness of the method is verified by experiments on an APAA with $24times 32$ elements to compensate the effect of typical deformation in the operating environment. The work can provide theoretical basis to guarantee the electromagnetic performance of APAAs in real time.","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":"131380852","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
SAR multi-frequency observations of vegetation in agricultural and mountain areas 农业和山区植被的SAR多频观测
2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232372
S. Paloscia, G. Fontanelli, A. Lapini, E. Santi, S. Pettinato, C. Notarnicola, Eugenia Chiarito, G. Cuozzo, D. Tapete, F. Cigna
{"title":"SAR multi-frequency observations of vegetation in agricultural and mountain areas","authors":"S. Paloscia, G. Fontanelli, A. Lapini, E. Santi, S. Pettinato, C. Notarnicola, Eugenia Chiarito, G. Cuozzo, D. Tapete, F. Cigna","doi":"10.23919/URSIGASS49373.2020.9232372","DOIUrl":"https://doi.org/10.23919/URSIGASS49373.2020.9232372","url":null,"abstract":"In this paper, the potential of space-borne Synthetic Aperture Radar (SAR) sensors combined with optical ones has been exploited by analyzing datasets collected on two vegetated areas in Italy, by using COSMO-SkyMed X-band and Sentinel-1 C-band SAR, PRISMA hyperspectral and Sentinel-2 multispectral imagery, combined with field measurements acquired with spectroradiometers. On the mountain area in Alto Adige, a biomass estimation approach was developed by combining Sentinel-1 SAR and spectroradiometer hyperspectral data. On Val d’Elsa area in Tuscany, COSMO-SkyMed StripMap HIMAGE and Sentinel-1 Interferometric Wide swath mode SAR data have been integrated with Sentinel-2 imagery for improving the classification of agricultural crops. Convolutional Neural Networks (CNN) have been used for the classification of agricultural areas using these three sensors.","PeriodicalId":438881,"journal":{"name":"2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science","volume":"11 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":"128029962","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
A High-Gain Circularly Polarized Patch Antenna Using a Circular Ring Reflector for GNSS 一种用于GNSS的环形反射器高增益圆极化贴片天线
2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232385
P. Boontamchauy, N. Supreeyatitikul, N. Teerasuttakorn, P. Wongsakulphasatch
{"title":"A High-Gain Circularly Polarized Patch Antenna Using a Circular Ring Reflector for GNSS","authors":"P. Boontamchauy, N. Supreeyatitikul, N. Teerasuttakorn, P. Wongsakulphasatch","doi":"10.23919/URSIGASS49373.2020.9232385","DOIUrl":"https://doi.org/10.23919/URSIGASS49373.2020.9232385","url":null,"abstract":"A design of circular ring reflector is presented to accomplish a high-gain antenna with circular polarization for GNSS application instead of using an LNA. The measured directivity reveals an enhancement of gain by back-lobe reduction. The reflection coefficient, appears -10 dB, is 71.51 %BW from 1.06 to 2.24 GHz. The axial ratio, under the area of 3 dB, is 36.14 %BW over 1.142 - 1.646 GHz. The average gain is 6.86 dBi overall GNSS band, while the maximum gain is 7.43 dBi at 1.314 GHz.","PeriodicalId":438881,"journal":{"name":"2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science","volume":"17 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":"128083423","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
Novel Miniaturized Sinuous Antenna for UWB Applications 用于超宽带的新型小型化弯曲天线
2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232245
C. Lamacchia, M. Gallo, L. Mescia, P. Bia, D. Gaetano, C. Canestri, C. Mitrano, A. Manna
{"title":"Novel Miniaturized Sinuous Antenna for UWB Applications","authors":"C. Lamacchia, M. Gallo, L. Mescia, P. Bia, D. Gaetano, C. Canestri, C. Mitrano, A. Manna","doi":"10.23919/URSIGASS49373.2020.9232245","DOIUrl":"https://doi.org/10.23919/URSIGASS49373.2020.9232245","url":null,"abstract":"This paper presents the design of an ultra-wideband (UWB) four arms non-conventional sinuous antenna exploiting the advantages of two optimized miniaturization techniques. The antenna works from 1.5 GHz to 18 GHz, radiating a slant 45 polarization. It is printed on a dielectric substrate having a diameter of 6 cm. Finally the antenna exhibits good matching properties, high realized gain and directive stable patterns over the entire frequency range.","PeriodicalId":438881,"journal":{"name":"2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science","volume":"6 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":"133227219","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
Analysis of the nighttime lower ionosphere for equatorial, low and middle latitudes over a region from 30°E and 60°E 东经30°和东经60°范围内赤道、低纬度和中纬度地区夜间较低电离层的分析
2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232313
J. Samanes, Fernanda Flórez
{"title":"Analysis of the nighttime lower ionosphere for equatorial, low and middle latitudes over a region from 30°E and 60°E","authors":"J. Samanes, Fernanda Flórez","doi":"10.23919/URSIGASS49373.2020.9232313","DOIUrl":"https://doi.org/10.23919/URSIGASS49373.2020.9232313","url":null,"abstract":"We present 4-year study of the nighttime lower ionosphere height (hN) behavior for equatorial, low and middle latitudes over a region from 30°E to 60°E. The results show that hN oscillates with semiannual (SAO) and annual (AO) periodicity, being SAO dominant for low and equatorial latitudes, while AO seems to be significant for middle latitudes. For equatorial and middle latitudes, hN shows negative correlation with the mesospheric temperature variation, suggesting a close relation with the dynamics of the Mesosphere-Lower Thermosphere Region (MLT). For middle latitudes, the results shows no clear correlation, it can be due to the presence of planetary waves with periods around 10, 12, 16 days which might affect the seasonal behavior of the nighttime lower ionosphere. Since planetary waves are very predominantly of tropospheric origin, this result is an evidence of the vertical couplings in the atmosphere-ionosphere system.","PeriodicalId":438881,"journal":{"name":"2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science","volume":"60 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":"131769412","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
Preliminary Study on the Feasibility of Reconstructing Anatomically Complex Numerical Brain Phantoms with Limited Prior Information 有限先验信息重建解剖复杂数值脑影可行性的初步研究
2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232149
Pan Lu, S. Ahsan, P. Kosmas
{"title":"Preliminary Study on the Feasibility of Reconstructing Anatomically Complex Numerical Brain Phantoms with Limited Prior Information","authors":"Pan Lu, S. Ahsan, P. Kosmas","doi":"10.23919/URSIGASS49373.2020.9232149","DOIUrl":"https://doi.org/10.23919/URSIGASS49373.2020.9232149","url":null,"abstract":"In this paper, we present a preliminary study of brain imaging by using MWI algorithms when limited prior information is given. By using the distorted Born iterative method with the fast iterative shrinkage thresholding algorithm, reconstructions are performed for different kinds of head models based on the anatomically complex numerical Zubal head phantom. Results show that the quality of the reconstructed images decreases when less prior information is given.","PeriodicalId":438881,"journal":{"name":"2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science","volume":"6 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":"134207089","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
EQM front-end receivers at 183 and 229 GHz for the Microwave Sounder on MetOp-SG MetOp-SG上用于微波测深仪的183 GHz和229 GHz EQM前端接收机
2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232214
D. Cuadrado-Calle, S. Rea, O. Auriacombe, M. Oldfield, K. Parow-Souchon, A. Obeed, D. Klugmann, B. Rackauskas, B. Davis, P. Hunyor, M. Merritt, M. Phillips, M. Beardsley, W. Robins, J. Hampton, N. Brewster, P. Norbury, A. Cullum, H. Wang, M. Henry, A. Shepperd, D. Gerber, C. Howe, G. Burton, A. Marshall, T. Almond, D. Alves, E. Johnson, F. Aparicio, B. Moyna, B. Ellison, B. Thomas, M. Brandt, M. Philipp, G. Sonnabend, T. Stangier, A. Kilian, M. Trasatti, R. Hammett, P. Campbell, V. Kangas, P. Piironen
{"title":"EQM front-end receivers at 183 and 229 GHz for the Microwave Sounder on MetOp-SG","authors":"D. Cuadrado-Calle, S. Rea, O. Auriacombe, M. Oldfield, K. Parow-Souchon, A. Obeed, D. Klugmann, B. Rackauskas, B. Davis, P. Hunyor, M. Merritt, M. Phillips, M. Beardsley, W. Robins, J. Hampton, N. Brewster, P. Norbury, A. Cullum, H. Wang, M. Henry, A. Shepperd, D. Gerber, C. Howe, G. Burton, A. Marshall, T. Almond, D. Alves, E. Johnson, F. Aparicio, B. Moyna, B. Ellison, B. Thomas, M. Brandt, M. Philipp, G. Sonnabend, T. Stangier, A. Kilian, M. Trasatti, R. Hammett, P. Campbell, V. Kangas, P. Piironen","doi":"10.23919/URSIGASS49373.2020.9232214","DOIUrl":"https://doi.org/10.23919/URSIGASS49373.2020.9232214","url":null,"abstract":"RAL Space has delivered four engineering qualification model (EQM) front-end receivers (FERXs) for the Microwave Sounder (MWS) and Microwave Imager (MWI) on-board the MetOp Second Generation (MetOp-SG) satellites. This mission will provide the European and wider global communities with weather forecasting services from 2022 to 2043. The two EQM FERXs developed by RAL for the MWS operate in the 183 and 229 GHz frequency ranges, featuring average double sideband (DSB) noise figures (NFs) of 5.3 and 6.2 dB, respectively. This paper presents the design and main characterisation results of these two state-of-the-art FERXs for the MWS and compares their performance with other in-orbit microwave sounding instruments, including those on-board MetOp.","PeriodicalId":438881,"journal":{"name":"2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science","volume":"11 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":"133822065","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
Compact Dual-Polarized Metasurface Antenna with Extended Axial Ratio Beamwidth for S and C-band Applications 用于S和c波段应用的扩展轴比波束宽度的紧凑型双极化超表面天线
2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232163
M. Ameen, R. Chaudhary
{"title":"Compact Dual-Polarized Metasurface Antenna with Extended Axial Ratio Beamwidth for S and C-band Applications","authors":"M. Ameen, R. Chaudhary","doi":"10.23919/URSIGASS49373.2020.9232163","DOIUrl":"https://doi.org/10.23919/URSIGASS49373.2020.9232163","url":null,"abstract":"This work discusses the design of a triple-band and dualpolarized high gain circularly polarized (CP) antenna based on artificial transmission line (ATL) based metamaterial (MTM) structures. To enhance the gain and extend the axial ratio (AR) beamwidth, a new multi-band artificial magnetic conductor (AMC) based metasurface (MS) is placed below the radiating triple-band antenna. Due to this, the impedance bandwidth (IBW), gain and AR beamwidth is enhanced. The intended antenna provides overall dimensions of $0.36lambda_{0}times 0.36lambda_{0}times 0.10lambda_{0}$ at2.57 GHz. Also, the antenna is capable of providing positive gain value and extended AR beamwidth for theta $=pm 58^{0}$ and $phi=0^{0}$ to 3600 at 2.45 GHz. Hence the intended antenna is suitable for working in small satellite applications at S and C bands.","PeriodicalId":438881,"journal":{"name":"2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science","volume":"107 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":"134089089","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
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