发布求助
文献互助 智能选刊 最新文献

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

筛选
英文 中文
Simple Pattern Synthesis for Complicated Arrays 复杂阵列的简单方向图合成
2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2021-01-04 DOI: 10.23919/USNC-URSINRSM51531.2021.9336485
S. Ellingson
{"title":"Simple Pattern Synthesis for Complicated Arrays","authors":"S. Ellingson","doi":"10.23919/USNC-URSINRSM51531.2021.9336485","DOIUrl":"https://doi.org/10.23919/USNC-URSINRSM51531.2021.9336485","url":null,"abstract":"A simple method for approximate pattern synthesis is described. This method is applicable to arrays of any geometry and employing any element pattern, including non-uniformly spaced arrays, volumetric arrays, and arrays consisting of elements having significantly unequal embedded patterns, as is common in the presence of strong mutual coupling.","PeriodicalId":180982,"journal":{"name":"2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":" 37","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132040273","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
Verification of an Evaluator for a New-Radio Channel Estimator 新无线电信道估计器的评估器验证
2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2021-01-04 DOI: 10.23919/USNC-URSINRSM51531.2021.9336510
A. Weiss, A. Elsherbeni, J. Quimby
{"title":"Verification of an Evaluator for a New-Radio Channel Estimator","authors":"A. Weiss, A. Elsherbeni, J. Quimby","doi":"10.23919/USNC-URSINRSM51531.2021.9336510","DOIUrl":"https://doi.org/10.23919/USNC-URSINRSM51531.2021.9336510","url":null,"abstract":"In this paper, we develop a flexible framework for the evaluation of a channel estimator and verify it against an analytical solution of the frequency response of ideal phased array hardware components. This evaluator is necessary to support future work in the evaluation of a new Monte-Carlo based channel estimator for 5G wireless communication devices. This new channel estimator will provide more accurate channel estimation by accounting for hardware irregularities.","PeriodicalId":180982,"journal":{"name":"2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":"21 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":"121576640","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
[Copyright notice] (版权)
2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2021-01-04 DOI: 10.23919/usnc-ursinrsm51531.2021.9336434
{"title":"[Copyright notice]","authors":"","doi":"10.23919/usnc-ursinrsm51531.2021.9336434","DOIUrl":"https://doi.org/10.23919/usnc-ursinrsm51531.2021.9336434","url":null,"abstract":"","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":"124993105","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
Antenna Comparison for Additive Manufacturing versus Traditional Manufacturing Methods 天线增材制造与传统制造方法的比较
2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2021-01-04 DOI: 10.23919/USNC-URSINRSM51531.2021.9336492
Gregory A. Mitchell, T. Anthony, Z. Larimore, P. Parsons
{"title":"Antenna Comparison for Additive Manufacturing versus Traditional Manufacturing Methods","authors":"Gregory A. Mitchell, T. Anthony, Z. Larimore, P. Parsons","doi":"10.23919/USNC-URSINRSM51531.2021.9336492","DOIUrl":"https://doi.org/10.23919/USNC-URSINRSM51531.2021.9336492","url":null,"abstract":"We present the comparison of a dual S/X-band antenna manufactured using traditional methods versus a version produced by additive manufacturing. The S-band element is an annular ring antenna with a shorting wall to suppress surface waves and increase isolation between excitation ports. The X-band element is a concentric patch. Both elements use orthogonal feeds to allow horizontal and vertical polarizations. Our results show excellent agreement between the two methods for this antenna design.","PeriodicalId":180982,"journal":{"name":"2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":"76 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":"114811483","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
Stochastic FDTD Modeling of Propagation Loss due to Random Surface Roughness in Sidewalls of Optical Interconnects 光纤互连侧壁随机表面粗糙度引起的传输损耗的随机FDTD建模
2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2021-01-04 DOI: 10.23919/USNC-URSINRSM51531.2021.9336433
Brian Guiana, A. Zadehgol
{"title":"Stochastic FDTD Modeling of Propagation Loss due to Random Surface Roughness in Sidewalls of Optical Interconnects","authors":"Brian Guiana, A. Zadehgol","doi":"10.23919/USNC-URSINRSM51531.2021.9336433","DOIUrl":"https://doi.org/10.23919/USNC-URSINRSM51531.2021.9336433","url":null,"abstract":"The dielectric waveguide (WG) is an important building block of high-speed and high-bandwidth optical and opto-electronic interconnect networks that operate in the THz frequency regime. At the interface of Si/SiO2 dielectric waveguides with width above $w = 2.5 mu m$ and anisotropic surface roughness, transverse electric (TE) mode surface wave propagation can experience a loss of approximately $a = 2 dB/cm$; however, propagation losses increase rapidly to near $a = 44 dB/cm$ as the width decreases to $w = 500 nm$, due to increased interaction of surface waves and sidewall surface roughness that exhibits random distribution inherent to the manufacturing process. Previous works have developed analytic expressions for computing propagation loss in a single dielectric waveguide exhibiting random roughness. More recent works report $a = 0.4 dB/cm$ noting the non-trivial estimation errors in previous theoretical formulations which relied on planar approximations, and highlight the discrepancy in planar approximations vs. the 3-D Volume Current Method. A challenge that remains in the path of designing nanoscale optical interconnects is the dearth of efficient 3-D stochastic computational electromagnetic (CEM) models for multiple tightly coupled optical dielectric waveguides that characterize propagation loss due to random surface roughness in waveguide sidewalls. Through a series of theoretical and numerical experiments developed in the method of finite-difference time-domain (FDTD), we aim to develop stochastic CEM models to quantify propagation loss and facilitate signal & power integrity modeling & simulation of arbitrary configurations of multiple tightly-coupled waveguides, and to gain further insights into loss mechanisms due to random surface roughness in optical interconnects.","PeriodicalId":180982,"journal":{"name":"2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":"6 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":"121879525","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
Measuring GPS EIRP in Real-Time with a Spaceborne GNSS-Reflectometry Remote Sensing System 利用星载gnss -反射遥感系统实时测量GPS EIRP
2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2021-01-04 DOI: 10.23919/USNC-URSINRSM51531.2021.9336441
Tianlin Wang, C. Ruf
{"title":"Measuring GPS EIRP in Real-Time with a Spaceborne GNSS-Reflectometry Remote Sensing System","authors":"Tianlin Wang, C. Ruf","doi":"10.23919/USNC-URSINRSM51531.2021.9336441","DOIUrl":"https://doi.org/10.23919/USNC-URSINRSM51531.2021.9336441","url":null,"abstract":"This paper presents a unique technique which uses a spaceborne GNSS receiver system to measure GPS EIRP in real time and then uses it to improve the calibration of NBRCS for GNSS-Reflectometry observations. It includes two steps: precise gain calibration of satellite GNSS antenna using on-orbit measurements, and dynamic GPS EIRP calibration with a spaceborne system. For the CYGNSS mission, it successfully recovers the flagged measurements (~37% of the entire dataset) to be included in the standard science data products and further improves the mission's science data quality.","PeriodicalId":180982,"journal":{"name":"2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":"51 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":"130273853","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
Fabrication and Characterization of a 900-Element 222.5 GHz Single-bit Reflective Surface with Suppressed Quantization Lobes 带有抑制量化瓣的900元222.5 GHz单比特反射表面的制备与表征
2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2021-01-04 DOI: 10.23919/USNC-URSINRSM51531.2021.9336511
Bharath G. Kashyap, P. Theofanopoulos, Yiran Cui, G. Trichopoulos
{"title":"Fabrication and Characterization of a 900-Element 222.5 GHz Single-bit Reflective Surface with Suppressed Quantization Lobes","authors":"Bharath G. Kashyap, P. Theofanopoulos, Yiran Cui, G. Trichopoulos","doi":"10.23919/USNC-URSINRSM51531.2021.9336511","DOIUrl":"https://doi.org/10.23919/USNC-URSINRSM51531.2021.9336511","url":null,"abstract":"We present a topology for suppressing quantization lobes in 1-bit reconfigurable reflective surfaces (RRSs). RRSs are planar surfaces that redirect the imping waves to the desired direction through phase modulation. For single-bit modulation, plane-wave illuminated RRSs exhibit quantization lobes due to the limited number of available phase bits. To eliminate such lobes, we randomize the quantization error by employing a fixed but random phase delay in every unit-cell of the RRS. Specifically, we focus on the fabrication and characterization of a mmWave single-layer, 1-bit, 30×30 randomized RRS designed at 222.5 GHz. The quasi-optical RCS characterization of the fabricated RRS demonstrates the successful suppression of the quantization lobe using the proposed technique.","PeriodicalId":180982,"journal":{"name":"2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":"125 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":"121336149","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 Concept of a Mesoband Source Combining a Reflectarray Antenna and a Switched Oscillator 反射天线与开关振荡器相结合的中频源概念
2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2021-01-04 DOI: 10.23919/USNC-URSINRSM51531.2021.9336512
Felix Cabrera Vega, F. Albarracin-Vargas, C. Kasmi
{"title":"A Concept of a Mesoband Source Combining a Reflectarray Antenna and a Switched Oscillator","authors":"Felix Cabrera Vega, F. Albarracin-Vargas, C. Kasmi","doi":"10.23919/USNC-URSINRSM51531.2021.9336512","DOIUrl":"https://doi.org/10.23919/USNC-URSINRSM51531.2021.9336512","url":null,"abstract":"We present in this paper the concept of a Mesoband radiating system, combining a quarter-wave switched oscillator source and a TEM-fed reflectarray antenna.","PeriodicalId":180982,"journal":{"name":"2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":"61 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":"127238270","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 Space-angle Discontinuous Galerkin Method for One-Dimensional Cylindrical Radiative Transfer Equation with Angular Decomposition 一维圆柱辐射传递方程角分解的空间角间断伽辽金法
2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2021-01-04 DOI: 10.23919/USNC-URSINRSM51531.2021.9336476
H. Wang, R. Abedi, S. Mudaliar
{"title":"A Space-angle Discontinuous Galerkin Method for One-Dimensional Cylindrical Radiative Transfer Equation with Angular Decomposition","authors":"H. Wang, R. Abedi, S. Mudaliar","doi":"10.23919/USNC-URSINRSM51531.2021.9336476","DOIUrl":"https://doi.org/10.23919/USNC-URSINRSM51531.2021.9336476","url":null,"abstract":"The radiative transfer equation (RTE) for one-dimensional cylindrical problem involving scattering, absorption and radiation is solved using the discontinuous Galerkin (DG) finite element method (FEM). Both space and angle directions are discretized by the DG method. A special iterative procedure is used that solves a succession of sub-domains created by angular decomposition (AD). The problem is formulated for nonzero phase functions. The angular interaction terms are not explicitly added to the system solution matrix. A few benchmark problems are conducted to study the performance of the method.","PeriodicalId":180982,"journal":{"name":"2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":"79 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":"124083490","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
Artifacts of Capturing Unintentional RF Energy Transfer During In Vitro Tonsillectomy 体外扁桃体切除术中捕获非故意射频能量转移的伪影
2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2021-01-04 DOI: 10.23919/USNC-URSINRSM51531.2021.9336517
Vigyanshu Mishra, A. Kiourti, Weston L. Niermeyer, Tendy Chiang
{"title":"Artifacts of Capturing Unintentional RF Energy Transfer During In Vitro Tonsillectomy","authors":"Vigyanshu Mishra, A. Kiourti, Weston L. Niermeyer, Tendy Chiang","doi":"10.23919/USNC-URSINRSM51531.2021.9336517","DOIUrl":"https://doi.org/10.23919/USNC-URSINRSM51531.2021.9336517","url":null,"abstract":"We have recently reported unintentional RF energy transfer to metal-based mouth retractor during tonsillectomy. Use of a highly sensitive current sensor to quantify this unintentional energy ends up capturing: (a) unintentional RF current coupled to the mouth retractor, (b) current flowing through the wire and probe of the electrosurgical equipment, and (c) current following through tissue during firing. The latter two are artifacts and hence undesired. In this work, we evaluate these artifacts via in vitro tonsillectomy experiments in presence and absence of mouth retractor. Our study shows that artifacts can lead to an overestimation of the unintentionally coupled current by 4.3, 2.6, and 2 times for power levels of 10 W, 20 W, and 30 W set at the electrosurgical generator, respectively. Hence, we illuminate the need for careful experimental design in future to eliminate such artifacts.","PeriodicalId":180982,"journal":{"name":"2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)","volume":"16 4 Suppl 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":"117053614","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信