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2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)最新文献

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A numerical study of HPEM coupling to a nonlinearly loaded cavity subject to an electric energy storage effect 受电能储存效应影响的非线性负载腔内HPEM耦合的数值研究
2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS) Pub Date : 2021-08-28 DOI: 10.23919/URSIGASS51995.2021.9560591
R. Michels, M. Schaarschmidt, F. Gronwald
{"title":"A numerical study of HPEM coupling to a nonlinearly loaded cavity subject to an electric energy storage effect","authors":"R. Michels, M. Schaarschmidt, F. Gronwald","doi":"10.23919/URSIGASS51995.2021.9560591","DOIUrl":"https://doi.org/10.23919/URSIGASS51995.2021.9560591","url":null,"abstract":"In this contribution we numerically analyze the behavior of a nonlinearly loaded loop antenna inside a resonating environment. As shown by previous research, a transient HPEM excitation can lead to a DC-component in the response of a nonlinearly receiving structure which is attributed to electric energy that is stored during rather long time scales. Oscillations caused by the resonating environment overlap with this DC-component, leading to an overall increased effect.","PeriodicalId":152047,"journal":{"name":"2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132523428","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
Stimulation of a Layered Medium by $N$ External Dipoles 外偶极子对层状介质的刺激
2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS) Pub Date : 2021-08-28 DOI: 10.23919/URSIGASS51995.2021.9560485
Andreas Kalogeropoulos, N. Tsitsas
{"title":"Stimulation of a Layered Medium by $N$ External Dipoles","authors":"Andreas Kalogeropoulos, N. Tsitsas","doi":"10.23919/URSIGASS51995.2021.9560485","DOIUrl":"https://doi.org/10.23919/URSIGASS51995.2021.9560485","url":null,"abstract":"A layered spherical medium is excited by a number of external electric dipoles. Boundary-value problems for the involved individual and overall electromagnetic fields are formulated. The direct scattering problem is solved by a T-Matrix method. Explicit formulas for the far-field, the overall cross section and the total interaction cross sections are derived. Some preliminary numerical results on the variations of these cross sections are presented.","PeriodicalId":152047,"journal":{"name":"2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134412224","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
Unobtrusive Respiratory Monitoring of Sleeping Subjects by Multiple Bioradars 多生物雷达在睡眠受试者呼吸监测中的应用
2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS) Pub Date : 2021-08-28 DOI: 10.23919/URSIGASS51995.2021.9560436
L. Anishchenko, V. Lobanova, L. Korostovtseva, M. Bochkarev, Y. Sviryaev
{"title":"Unobtrusive Respiratory Monitoring of Sleeping Subjects by Multiple Bioradars","authors":"L. Anishchenko, V. Lobanova, L. Korostovtseva, M. Bochkarev, Y. Sviryaev","doi":"10.23919/URSIGASS51995.2021.9560436","DOIUrl":"https://doi.org/10.23919/URSIGASS51995.2021.9560436","url":null,"abstract":"The development of effective personal non-contact methods for detecting sleep disorders, which may precede different health problems, is an up-to-date task of modern medicine. As was shown in recent studies, it is possible to detect sleep disorders by means of bioradar. However, the problem of view dependency of the radar-based sleep monitor performance needs to be overcome. In the present paper we presented a two-transceiver system and a signal processing algorithm for obtaining information about sleeping person respiratory rates at different positions of a human body during sleep. The proposed system was tested in a sleep laboratory of Almazov National Medical Research Centre with the participation of 5 volunteers. The performance of the proposed algorithm was estimated by comparison with a full-night polysomnography data. The achieved results showed that the designed two-channel bioradar system proved to be more accurate and robust than a single bioradar. The results might contribute to extension of bioradar sleep monitoring technology.","PeriodicalId":152047,"journal":{"name":"2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134534774","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
Energy Harvesting for Autonomous Wireless Sensor Platforms 自主无线传感器平台的能量收集
2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS) Pub Date : 2021-08-28 DOI: 10.23919/URSIGASS51995.2021.9560611
A. Georgiadis
{"title":"Energy Harvesting for Autonomous Wireless Sensor Platforms","authors":"A. Georgiadis","doi":"10.23919/URSIGASS51995.2021.9560611","DOIUrl":"https://doi.org/10.23919/URSIGASS51995.2021.9560611","url":null,"abstract":"Energy harvesting technologies are particularly suitable for miniature wireless sensing platforms which require a small amount of power to operate and have limited energy storage capability due to the fact that batteries limit their performance due to requirements such as for example, small size, reduced weight, sufficient capacity or environmental concerns associated with spent batteries. While the physical phenomena behind such harvesting technologies have been typically known for many years, recent advances in low power circuit design, material science, low power micro controllers and fabrication technologies, such as additive manufacturing, have enabled the optimization and integration of multiple energy harvesters in low power wireless sensors with small form factors in order to increase energy autonomy and enable their use in diverse application scenarios. This paper presents selected advances in the field of energy harvesting for wireless sensing platforms.","PeriodicalId":152047,"journal":{"name":"2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"1999 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134293427","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
SURA heating facility: 40 years of active ionospheric experiments, studying the atmosphere and near-Earth space SURA加热设施:40年活跃的电离层实验，研究大气和近地空间
2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS) Pub Date : 2021-08-28 DOI: 10.23919/URSIGASS51995.2021.9560294
A. Shindin
{"title":"SURA heating facility: 40 years of active ionospheric experiments, studying the atmosphere and near-Earth space","authors":"A. Shindin","doi":"10.23919/URSIGASS51995.2021.9560294","DOIUrl":"https://doi.org/10.23919/URSIGASS51995.2021.9560294","url":null,"abstract":"The paper is dedicated to the 40th anniversary of the SURA heating facility. The history of construction, technical characteristics, research fields and the results of the last modernization are presented.","PeriodicalId":152047,"journal":{"name":"2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"94 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131716361","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
Cosmic Noise Absorption Characteristics during the Impulse-Induced Supersubstorm of 21st January 2005 2005年1月21日脉冲诱发的超级亚暴期间的宇宙噪声吸收特征
2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS) Pub Date : 2021-08-28 DOI: 10.23919/URSIGASS51995.2021.9560256
Shipra Sinha, G. Vichare, A. Sinha, R. Rawat, Gopi Seemala, S. Gokani, H. Frey, A. Kero
{"title":"Cosmic Noise Absorption Characteristics during the Impulse-Induced Supersubstorm of 21st January 2005","authors":"Shipra Sinha, G. Vichare, A. Sinha, R. Rawat, Gopi Seemala, S. Gokani, H. Frey, A. Kero","doi":"10.23919/URSIGASS51995.2021.9560256","DOIUrl":"https://doi.org/10.23919/URSIGASS51995.2021.9560256","url":null,"abstract":"The impulse-induced super substorm of 21st January 2005 has been reported by Hajra and Tsurutani (2018) and they have discussed the abnormal morphology of the auroral dynamics mainly examining the auroral images and currents. This event is revisited here with additional datasets of global Cosmic Noise Absorption (CNA) by Riometers, auroral images by a space-based Imager, plasma flux data from geostationary satellites and magnetic field measurements of ground stations covering almost all latitudinal and local time sectors. We have observed some peculiar characteristics of this event: (1) No southward component of IMF Bz prior to the substorm onset. (2) Westward electrojet current peaks in the dawn sector, and not in the midnight sector, during the substorm interval. (3) Presence of dayside shock-auroras: The electron & proton auroras are stronger in the pre and post-midnight sectors and strongest on the dayside. (4) The time of CNA onset and substorm onset coincide in the narrow belt of magnetic latitude near 65°. The time delay between these two increases away from this belt on both-poleward and equatorward latitudes. The delay is small (~ 2 minutes) on the dayside and significant (~11 minutes) on the night side. (5) The percentage of CNA is found to vary with MLT as well as with latitudes. CNA absorption is lowest on the dayside (~20%) whereas near dawn and dusk the percentage of CNA is nearly equal (~40-50%). (6) Considering the model proposed by Sorathia et al. (2019) we can say that the dawn-dusk symmetry observed in the CNA indicates the entry of particles from the flanks facilitated by Kelvin-Helmholtz instability.","PeriodicalId":152047,"journal":{"name":"2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131813571","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 Wideband Compact Quasi-Yagi Antenna with U-shaped Slots on The Ground Plane 一种带u型槽的宽带紧凑型准八木天线
2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS) Pub Date : 2021-08-28 DOI: 10.23919/URSIGASS51995.2021.9560532
Goksel Turan, H. Odabasi, Mahdi Salimitorkamani
{"title":"A Wideband Compact Quasi-Yagi Antenna with U-shaped Slots on The Ground Plane","authors":"Goksel Turan, H. Odabasi, Mahdi Salimitorkamani","doi":"10.23919/URSIGASS51995.2021.9560532","DOIUrl":"https://doi.org/10.23919/URSIGASS51995.2021.9560532","url":null,"abstract":"This paper presents a wideband compact quasi-Yagi antenna for C, X and Ku-Band applications. The proposed antenna structure has a simple feeding mechanism consists of a microstrip line and a transmission line. Half of the driver and director are printed on the opposite side of the substrate to ensure good coupling between the antenna elements and achieve a stable radiation pattern. In addition, the ground plane is also modified with U-shaped slots allowing better impedance matching and enhanced bandwidth performance. The proposed antenna can achieve −10 dB bandwidth of 90% between 5.2 - 13.7 GHz and a gain of 3.6 - 6.5 dBi across the bandwidth with a compact size of $0.85lambda_{c}times 0.69lambda_{c}$ at the center frequency. The antenna is a good candidate for wireless communication systems, phased arrays, and mm-wave imaging systems.","PeriodicalId":152047,"journal":{"name":"2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131826327","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
Temperature-dependent Dielectric Properties of Breast Tissue Phantoms for Hyperthermia Applications 热疗应用中乳腺组织幻影的温度依赖介电特性
2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS) Pub Date : 2021-08-28 DOI: 10.23919/URSIGASS51995.2021.9560228
T. Yilmaz, Cemanur Aydinalp, Emre Onemli
{"title":"Temperature-dependent Dielectric Properties of Breast Tissue Phantoms for Hyperthermia Applications","authors":"T. Yilmaz, Cemanur Aydinalp, Emre Onemli","doi":"10.23919/URSIGASS51995.2021.9560228","DOIUrl":"https://doi.org/10.23919/URSIGASS51995.2021.9560228","url":null,"abstract":"Microwave diagnostic and treatment technologies for breast cancer have been a popular research interest among researchers. To test the proposed systems many different tissue mimicking phantom materials have been proposed in the literature for testing of microwave breast cancer imaging and hyperthermia devices. One popular tissue mimicking phantom, named oil-in-gelatin dispersion phantoms, are used widely to replicate the dielectric properties different tissue types. These phantoms are used for testing of implantable antennas, microwave imaging devices, and hyperthermia devices. However, the temperature dependent dielectric properties of the phantoms have not been investigated in the literature. This work investigates the dielectric properties of the phantoms with respect to temperature to validate the phantoms can replicate the temperature-dependent dielectric properties of the tissues.","PeriodicalId":152047,"journal":{"name":"2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130694056","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
Iterative Space-angle Discontinuous Galerkin Method for Radiative Transfer Problems from 1D to 3D 一维到三维辐射传递问题的迭代空间角间断伽辽金法
2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS) Pub Date : 2021-08-28 DOI: 10.23919/URSIGASS51995.2021.9560325
Han Wang, R. Abedi, S. Mudaliar
{"title":"Iterative Space-angle Discontinuous Galerkin Method for Radiative Transfer Problems from 1D to 3D","authors":"Han Wang, R. Abedi, S. Mudaliar","doi":"10.23919/URSIGASS51995.2021.9560325","DOIUrl":"https://doi.org/10.23919/URSIGASS51995.2021.9560325","url":null,"abstract":"The radiative transfer equation (RTE) for problems involving scattering, absorption and radiation is solved using the space-angle discontinuous Galerkin (DG) method in multi-dimensions from 1D to 3D. The space and angle is fully discretized by the DG formulation by utilizing the element extrusion technique. Moreover, the iterative and parallel scheme is used for the solution process, making the process in a relatively cheap way.","PeriodicalId":152047,"journal":{"name":"2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130782989","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
HF Propagation modeling validation for Earth to space transmission by multiple bounces links 多弹跳链路地空传输高频传播建模验证
2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS) Pub Date : 2021-08-28 DOI: 10.23919/URSIGASS51995.2021.9560608
S. Rougerie, K. Hozumi, K. Hosokawa, V. Fabbro
{"title":"HF Propagation modeling validation for Earth to space transmission by multiple bounces links","authors":"S. Rougerie, K. Hozumi, K. Hosokawa, V. Fabbro","doi":"10.23919/URSIGASS51995.2021.9560608","DOIUrl":"https://doi.org/10.23919/URSIGASS51995.2021.9560608","url":null,"abstract":"The HFPE (HF Propagation Experimentation) technological experiment aims at consolidating a new concept of long-range transmissions between ground and the Low Earth Orbit (LEO). This concept relies on over-the-horizon trans-ionospheric links in the HF-band. To prepare this experiment, propagation modelling has been carried out and more particularly, a HF link planning software called MSATIS [1] [2]. Since this development, new constraints appeared in the demonstration: in accordance with the frequency regulation, only several fixed frequencies can be used in the HF spectrum. Second, the demonstration needs also accurate time synchronization, and propagation delay must be predicted. In order to reach these two new constraints, a new Earth - Space HF propagation model, based on ray-tracing principle, has been developed, and is presented in this paper.","PeriodicalId":152047,"journal":{"name":"2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131149097","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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