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2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)最新文献

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Bovine Calf Serum: Broadband Dielectric Properties and an Emulating Phantom 牛犊牛血清:宽频介电特性与模拟幻象
2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2021-01-04 DOI: 10.23919/USNC-URSINRSM51531.2021.9336499
Vigyanshu Mishra, Zeke Z. Dalisky, A. Kiourti
{"title":"Bovine Calf Serum: Broadband Dielectric Properties and an Emulating Phantom","authors":"Vigyanshu Mishra, Zeke Z. Dalisky, A. Kiourti","doi":"10.23919/USNC-URSINRSM51531.2021.9336499","DOIUrl":"https://doi.org/10.23919/USNC-URSINRSM51531.2021.9336499","url":null,"abstract":"Bovine calf serum (BCS) is often used as a substitute to emulate synovial fluid, a fluid found in the human joints such as the elbow, knee, shoulder, and hip. To date, the dielectric properties of BCS are unknown, in turn limiting the development of RF/microwave solutions to monitor the joint(s). In this work, we report the first measurements of BCS dielectric properties (permittivity and loss tangent) in the 200 MHz to 20 GHz range. In addition, we present a phantom that accurately emulates the frequency-dependent dielectric properties of BCS. An example demonstration matches the BCS dielectric properties from 0.9 GHz to 1.9 GHz with a deviation of less than ±0.6 in relative permittivity and ±0.031 in loss tangent. Our recipe relies on readily available water, sugar (0.35 M), and salt (0.35 M), making the phantom an easy alternative to BCS for conducting RF/microwave experimental studies. By tweaking the sugar and salt content, our phantom can ultimately match the BCS dielectric properties in any desired frequency band.","PeriodicalId":180982,"journal":{"name":"2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":"441 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115614072","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 signal sub-space based approach for mitigating wind turbine clutter in fast scanning weather radar 一种基于信号子空间的快速扫描气象雷达风力机杂波抑制方法
2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2021-01-04 DOI: 10.23919/USNC-URSINRSM51531.2021.9336489
A. Dutta, V. Chandrasekar, E. Ruzanski
{"title":"A signal sub-space based approach for mitigating wind turbine clutter in fast scanning weather radar","authors":"A. Dutta, V. Chandrasekar, E. Ruzanski","doi":"10.23919/USNC-URSINRSM51531.2021.9336489","DOIUrl":"https://doi.org/10.23919/USNC-URSINRSM51531.2021.9336489","url":null,"abstract":"Removing turbine clutter from weather radar observations has become an essential problem in the community since wind turbine clutter signals (WTC) cannot be filtered using traditional clutter filtering. This paper addresses the problem of mitigation of WTC using knowledge of local precipitation and WTC signals to retain the maximum amount of precipitation and retrieve the filtered radar IQ data. The proposed algorithm uses the Generalized Likelihood Ratio Test (GLRT) to detect the range gates affected by WTC, and signal subspace estimation to mitigate the turbine clutter. The performances of the turbine clutter identification and suppression algorithms are also studied by a common evaluation technique of combining clear air wind turbine data and precipitation data.","PeriodicalId":180982,"journal":{"name":"2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123496738","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
Remarks on the Parabolic Equation Model for Waves in Random Media 关于随机介质中波的抛物方程模型的评述
2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2021-01-04 DOI: 10.23919/USNC-URSINRSM51531.2021.9336446
S. Mudaliar
{"title":"Remarks on the Parabolic Equation Model for Waves in Random Media","authors":"S. Mudaliar","doi":"10.23919/USNC-URSINRSM51531.2021.9336446","DOIUrl":"https://doi.org/10.23919/USNC-URSINRSM51531.2021.9336446","url":null,"abstract":"One of the most important contributions of V.I. Tatarskii is the introduction and development of the parabolic equation model (PEM) for waves in random media (WRM). Most of the theories for WRM are based on perturbation methods that place stringent constraints on the magnitude of refractive index fluctuations. The PEM was hence introduced as a strong fluctuation theory. An important merit of the theory is that one can obtain closed equations for moments of wave functions of any order. This model is based on the following three assumptions: (a) wave propagation is predominant in one direction (negligible backscatter), (b) the refractive index fluctuations obey Gaussian statistics, and (c) the random medium is delta correlated along the direction of propagation. In spite of the restrictions imposed by these assumptions, PEM has been quite successful in numerous applications since 1970.","PeriodicalId":180982,"journal":{"name":"2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115308686","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
ACCURACy: Adaptive Calibration of CUbesat RAdiometer Constellations 精度:立方体卫星辐射计星座的自适应校准
2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2021-01-04 DOI: 10.23919/USNC-URSINRSM51531.2021.9336481
John W. Bradburn, M. Aksoy, Henry R. Ashley
{"title":"ACCURACy: Adaptive Calibration of CUbesat RAdiometer Constellations","authors":"John W. Bradburn, M. Aksoy, Henry R. Ashley","doi":"10.23919/USNC-URSINRSM51531.2021.9336481","DOIUrl":"https://doi.org/10.23919/USNC-URSINRSM51531.2021.9336481","url":null,"abstract":"Recent advances in sensing technology have enabled the deployment of CubeSats equipped with radiometers for scientific missions. While constellations of CubeSats provide benefits to remote sensing science missions, they also bring with them unique challenges in calibration due to considerable sensitivity to ambient conditions. To address this problem, a constellation-level calibration framework is being developed, called “Adaptive Calibration of CUbesat RAdiometer Constellations (ACCURACy)”. This framework is in early stages, currently covering the theoretical basis through an initial end-to-end prototype utilizing synthetic data. This framework will use instrument-level telemetry data collected pre-launch and in-orbit to separate constellation members into time-adaptive groups (or clusters) of radiometers in similar states. Within clusters, all radiometers share their absolute calibration measurements to a common calibration data pool. These calibration pools, containing measurements of different calibration targets at different times, facilitate frequent multi-point absolute calibration. This, in turn, serves to reduce and quantify calibration errors and uncertainties.","PeriodicalId":180982,"journal":{"name":"2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":"184 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115639559","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
Review of Electrical - Power Transformer Responses to Fast Transients 电力变压器对快速瞬变的响应研究进展
2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2021-01-04 DOI: 10.23919/usnc-ursinrsm51531.2021.9336502
D. Giri, F. Tesche
{"title":"Review of Electrical - Power Transformer Responses to Fast Transients","authors":"D. Giri, F. Tesche","doi":"10.23919/usnc-ursinrsm51531.2021.9336502","DOIUrl":"https://doi.org/10.23919/usnc-ursinrsm51531.2021.9336502","url":null,"abstract":"Power transformers in the power grid are vulnerable to both man made and natural threats. This paper documents a literature search on the effects of fast electrical transients on power system transformers, for the purpose of estimating the effects of a high-altitude electromagnetic (HEMP) environment on transformers. In this study, data for both the HEMP signal attenuation and distortion as it propagates through the transformer, and for possible damage to the transformer has been found, and the measurement programs that developed these results are discussed. Unfortunately, only a limited number of results have been found, so the generalization of these measurements to a wide variety of different transformers is difficult. However, these results do provide some insight into transformer operation in an HEMP environment.","PeriodicalId":180982,"journal":{"name":"2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128363119","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
Extraction of Nonlinear X-Parameters from FDTD Simulation of a One-Port Device 单端口器件FDTD仿真中非线性x参数的提取
2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2021-01-04 DOI: 10.23919/USNC-URSINRSM51531.2021.9336444
J. Kast, A. Elsherbeni
{"title":"Extraction of Nonlinear X-Parameters from FDTD Simulation of a One-Port Device","authors":"J. Kast, A. Elsherbeni","doi":"10.23919/USNC-URSINRSM51531.2021.9336444","DOIUrl":"https://doi.org/10.23919/USNC-URSINRSM51531.2021.9336444","url":null,"abstract":"A formulation is developed for X-Parameters extraction of nonlinear devices when a finite-difference time-domain electromagnetic simulation is used. A simulation domain containing a diode is tested, and several excitation waveforms are applied to capture the diode's nonlinear behavior. Post-processing of simulation results allows for the extraction of X-Parameter values, and a good agreement is obtained when comparing the results from the developed procedure and a commercial simulator.","PeriodicalId":180982,"journal":{"name":"2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127155980","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
A Wireless Power Transfer System on Clothes Using Conductive Threads 一种利用导电线在衣服上的无线电力传输系统
2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2021-01-04 DOI: 10.23919/USNC-URSINRSM51531.2021.9336480
J. Barreto, Abdul-Sattar Kaddour, S. Georgakopoulos
{"title":"A Wireless Power Transfer System on Clothes Using Conductive Threads","authors":"J. Barreto, Abdul-Sattar Kaddour, S. Georgakopoulos","doi":"10.23919/USNC-URSINRSM51531.2021.9336480","DOIUrl":"https://doi.org/10.23919/USNC-URSINRSM51531.2021.9336480","url":null,"abstract":"Wireless Power Transmission (WPT) systems today are widely used for charging mobile devices and electric vehicles. Notably, WPT systems will play a critical role in the development of future implantable and wearable devices. In this work, we propose a WPT system that is based on conductive threads. This system can be sewn on clothes and can wirelessly charge/power wearable and implantable devices. Our simulation analysis shows that such a system is efficient and in accordance to the International Commission of Non-Ionizing Radiation Protection (ICNIRP) guidelines on Specific Absorption Rate (SAR).","PeriodicalId":180982,"journal":{"name":"2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116881312","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
Proper Orthogonal Decomposition for Analysis of High-Power Virtual Cathode Oscillations 大功率虚阴极振荡的适当正交分解分析
2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2021-01-04 DOI: 10.23919/USNC-URSINRSM51531.2021.9336478
J. L. Nicolini, F. Teixeira
{"title":"Proper Orthogonal Decomposition for Analysis of High-Power Virtual Cathode Oscillations","authors":"J. L. Nicolini, F. Teixeira","doi":"10.23919/USNC-URSINRSM51531.2021.9336478","DOIUrl":"https://doi.org/10.23919/USNC-URSINRSM51531.2021.9336478","url":null,"abstract":"The Proper Orthogonal Decomposition (POD) is a mode decomposition technique that can be used for the creation of reduced order models or for analysis of complex dynamic systems. In this work, we apply the POD to analyze the characteristics of the oscillations present in an electron beam with formation of an oscillating virtual cathode.","PeriodicalId":180982,"journal":{"name":"2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130612891","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
Deep Learning Enhanced Joint Geophysical Inversion for Crosswell Monitoring 基于深度学习的井间监测联合地球物理反演
2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2021-01-04 DOI: 10.23919/USNC-URSINRSM51531.2021.9336470
Yanyan Hu, Yuchen Jin, Xuqing Wu, Jiefu Chen, Jiuping Chen, Qiuyang Shen, Yueqin Huang
{"title":"Deep Learning Enhanced Joint Geophysical Inversion for Crosswell Monitoring","authors":"Yanyan Hu, Yuchen Jin, Xuqing Wu, Jiefu Chen, Jiuping Chen, Qiuyang Shen, Yueqin Huang","doi":"10.23919/USNC-URSINRSM51531.2021.9336470","DOIUrl":"https://doi.org/10.23919/USNC-URSINRSM51531.2021.9336470","url":null,"abstract":"A deep learning enhanced framework is proposed to jointly invert the crosswell DC resistivity and seismic travel time data. With the strong capability to extract the implicit patterns of the input data, our deep neural network is trained to fuse and extract the connections between separately inverted resistivity and velocity models by the conventional methods, while the structural similarity is imposed by letting the outputs of network approach the true resistivity and velocity models with the same structures. In the joint inversion framework, the well-trained network is adopted in an iterative way to generate the enhanced resistivity and velocity models to perform as the inputs for next round of inversion. Moreover, under our framework, multiple geophysical data can be used simultaneously to jointly invert the corresponding multiple properties. Numerical simulation demonstrates an improved accuracy of our method.","PeriodicalId":180982,"journal":{"name":"2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132557880","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
The Science of Electronics in Extreme Electromagnetic Environments I - Enclosure Coupling 极端电磁环境下的电子学ⅰ-机箱耦合
2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2021-01-04 DOI: 10.23919/USNC-URSINRSM51531.2021.9336507
E. Schamiloglu, S. Hemmady, Z. Peng, T. Hussey, T. Antonsen, S. Anlage, E. Ott
{"title":"The Science of Electronics in Extreme Electromagnetic Environments I - Enclosure Coupling","authors":"E. Schamiloglu, S. Hemmady, Z. Peng, T. Hussey, T. Antonsen, S. Anlage, E. Ott","doi":"10.23919/USNC-URSINRSM51531.2021.9336507","DOIUrl":"https://doi.org/10.23919/USNC-URSINRSM51531.2021.9336507","url":null,"abstract":"This AFOSR Center of Excellence established in 2015 has been studying the science of electronics in extreme electromagnetic environments. This presentation focuses on advancing computational electromagnetic techniques for statistical and deterministic extreme electromagnetic interference (EEMI) modeling; on EEMI interactions within wave chaotic enclosures; and with EEMI interactions in networked complex enclosures. A companion presentation discusses EEMI effects on elemental CMOS devices, electro-optic devices, mathematical frameworks for modeling EEMI effects on digital logic circuits, and modeling EEMI effects on software execution.","PeriodicalId":180982,"journal":{"name":"2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124006629","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
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