2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science最新文献_第3页

A Flexible PVA/CaCO3 Dielectric Film for Microwave Antenna Applications 微波天线用柔性PVA/CaCO3介电膜

2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232264

Sowmiyadevi Appusamy, Selvaraju Thangavelu, G. M, S. Raman

引用次数: 2

Scattering Modeling for Complex Radar Target based on Space Mapping Technique 基于空间映射技术的复杂雷达目标散射建模

2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232004

Tianxu Yan, Dongying Li, Wenxian Yu

引用次数: 0

mm-Wave Chipless RFID Tag for Healthcare Applications 用于医疗保健应用的毫米波无芯片RFID标签

2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232382

A. DiCarlofelice, E. DiGiampaolo, P. Tognolatti

引用次数: 4

Intriguing aspects of low latitude night-time F region irregularities over East and South-East Asia 东亚和东南亚低纬度夜间F区不规则性的有趣方面

2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232240

L. Joshi, L. Tsai, S. Su

{"title":"Intriguing aspects of low latitude night-time F region irregularities over East and South-East Asia","authors":"L. Joshi, L. Tsai, S. Su","doi":"10.23919/URSIGASS49373.2020.9232240","DOIUrl":"https://doi.org/10.23919/URSIGASS49373.2020.9232240","url":null,"abstract":"Generally, the occurrence of F region irregularities associated with Equatorial Plasma Bubbles is considered difficult to predict due to its day-to-day variability. Recent investigation shows that the dominant period of variability of EPB can be > 25 days (quasi 27 day), presumably associated with solar rotation period. VHF scintillation recorded from Pingtung, Taiwan in 2015 indicated the coexistence of planetary scale variability (4-8 days), 10-15 days variability and quasi 27 day variability. Lomb-Scargle power spectrum of S4 time series indicated that the larger period variability (quasi 27 days) is much more dominant than the other scales (which includes day-to-day variability). Interestingly, the dominant period of S4 variability corresponded exactly with the dominant period of high-latitude geomagnetic variability. Continuous operation of Equatorial Atmosphere Radar (EAR) in 2012 also indicated similar observation. Dominant period of variability of EPB in EAR observations corresponded with the high-latitude geomagnetic variability. These observations reveal that EPB are controlled predominantly by geomagnetic activity through large period variability (quasi- 27 days).","PeriodicalId":438881,"journal":{"name":"2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science","volume":"13 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":"114529566","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

Detection of Atmospheric Gravity Wave Activity during several Earthquakes 几次地震期间大气重力波活动的探测

2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232152

S. Kundu, Swati Chowdhury, Shih-Sian Yang, M. Hayakawa, Suman Chakraborti, S. Chakrabarti, S. Sasmal

{"title":"Detection of Atmospheric Gravity Wave Activity during several Earthquakes","authors":"S. Kundu, Swati Chowdhury, Shih-Sian Yang, M. Hayakawa, Suman Chakraborti, S. Chakrabarti, S. Sasmal","doi":"10.23919/URSIGASS49373.2020.9232152","DOIUrl":"https://doi.org/10.23919/URSIGASS49373.2020.9232152","url":null,"abstract":"The coupling between seismic hazards and ionosphere is an important topic in research field. The perturbation in ionosphere due to earthquake is an example of seismo-ionospheric coupling. The perturbation can be analyzed through the various channels of a mechanism called Lithosphere-Atmosphere-Ionosphere Coupling (LAIC). The three channels are thermal, electromagnetic and acoustic channel. Atmospheric Gravity wave (AGW) is lie in the acoustic channel. AGW is the most reliable parameter to predict the ionospheric perturbation due to Earthquake. In this study, we compute the potential energy (Ep) associated with the gravity waves. The Ep is derived from using temperature profiles retrieved from observations of Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) instrument on board the Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED)satellite for Tohoku Earthquake (Japan) (11 March 2011, MW - 9.0), Nepal Earthquake (25 April 2015 and 12 May 2015, MW - 7.8, MW - 7.3), Kumamoto Earthquake (15 April 2016, MW - 7.0) and Pakisan Earthquake (24 September 2019, MW - 5.6). There is a significant increment in AGW activity just before all the earthqukes. the abnormal AGW activity in the stratosphere is detected before the earthquake, and the coincidence of stratospheric AGW activity with VLF sub-ionospheric perturbations provides further support to the AGW hypothesis of the LAIC process.","PeriodicalId":438881,"journal":{"name":"2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science","volume":"28 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":"116264766","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

Teaching radiofrequency power measurements 射频功率测量教学

2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232370

C. Carobbi

{"title":"Teaching radiofrequency power measurements","authors":"C. Carobbi","doi":"10.23919/URSIGASS49373.2020.9232370","DOIUrl":"https://doi.org/10.23919/URSIGASS49373.2020.9232370","url":null,"abstract":"A method is here proposed to teach radiofrequency (RF) power measurements to master’s degree students in electronics and communications engineering. Before going into the details of the principle of operation and architecture of power meters (not discussed here) the topic of power measurement is introduced emphasizing the fact that power generators and meters are calibrated to indicate the power delivered to, or absorbed by, a perfect Z0 (e.g. $50 Omega)$ load. Then, it is discussed what happens when this perfect Z0 load assumption is not satisfied introducing the mismatch correction. The mismatch correction is analyzed in terms of uncertainty governed by the U-shaped probability density function (PDF). The U-shaped PDF gives the opportunity to discuss state-of-knowledge PDFs whose use is ubiquitous in measurement uncertainty estimation. Indeed, such U-shaped PDF is not the result of direct observation of the physical world, it reflects the state of knowledge of the experimenter about the physical phenomenon. These concepts are finally applied to a simple estimation of RF power measurement uncertainty, showing that mismatch is, as frequently occurs in precision power measurements, the dominant contribution to uncertainty.","PeriodicalId":438881,"journal":{"name":"2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science","volume":"176 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":"124333123","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

Results of Observations of the Ionosphere Response to a Partial Solar Eclipse on 11.08.2008 According to Data from a Network Oblique Sounding Paths in the Eurasian Region 欧亚地区斜向探测路径网观测2008年8月11日日偏食的电离层响应结果

2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232238

V. P. Uryadov, V. Kurkin, F. Vybornov, A. V. Pershin, O. Sheiner

引用次数: 0

Experimental Validation of a 3D Microwave Imaging Device for Brain Stroke Monitoring 脑卒中监测用三维微波成像装置的实验验证

2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232195

Jorge A. Tobon V., L. Crocco, F. Vipiana

引用次数: 0

orientation Determination of a Scatterer Based on Polarimetric Radar Measurements 基于极化雷达测量的散射体方位确定

2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9232220

N. Barbot, O. Rance, E. Perret

引用次数: 0

The Source Estimation of Electromagnetic Information Leakage from Information Devices 信息设备电磁信息泄漏源的估计

2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science Pub Date : 2020-08-01 DOI: 10.23919/URSIGASS49373.2020.9231979

Ryota Birukawa, Daiya Nagata, Y. Hayashi, T. Mizuki, H. Sone

引用次数: 3