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2018 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)最新文献

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A Periodic Array of Inhomogeneous Dielectric-Loaded Slots in an Infinite Thick Metallic Screen 无限厚金属屏中非均匀介电负载槽的周期性阵列
2018 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium) Pub Date : 2018-07-08 DOI: 10.1109/USNC-URSI.2018.8602892
Abdulaziz H. Haddab, E. Kuester
{"title":"A Periodic Array of Inhomogeneous Dielectric-Loaded Slots in an Infinite Thick Metallic Screen","authors":"Abdulaziz H. Haddab, E. Kuester","doi":"10.1109/USNC-URSI.2018.8602892","DOIUrl":"https://doi.org/10.1109/USNC-URSI.2018.8602892","url":null,"abstract":"Extraordinary transmission through a periodic array of inhomogeneous dielectric loaded slots in a an infinite metallic shield of finite thickness is demonstrated. We show that the intervals between those transmissions can be controlled by filled slots with inhomogeneous dielectric permittivity.","PeriodicalId":203781,"journal":{"name":"2018 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133081178","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
Fault Detection In PV Strings Using SSTDR 基于SSTDR的光伏串故障检测
2018 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium) Pub Date : 2018-07-08 DOI: 10.1109/USNC-URSI.2018.8602847
Naveen Kumar Tumkur Jayakumar, M. U. Saleh, E. Benoit, Josiah Lacombe, M. Scarpulla, C. Furse
{"title":"Fault Detection In PV Strings Using SSTDR","authors":"Naveen Kumar Tumkur Jayakumar, M. U. Saleh, E. Benoit, Josiah Lacombe, M. Scarpulla, C. Furse","doi":"10.1109/USNC-URSI.2018.8602847","DOIUrl":"https://doi.org/10.1109/USNC-URSI.2018.8602847","url":null,"abstract":"We present spread spectrum time domain reflectometry (SSTDR) analysis for finding faults in live PV arrays. SSTDR has been applied to a combination of PV modules, and responses are recorded and analyzed for various discrete discontinuities. An internal complex circuit diagram for a PV module is presented for the better understanding of the effect of the SSTDR signal inside the PV modules. Analysis of the SSTDR results is helpful to find the exact position of faults in PV arrays.","PeriodicalId":203781,"journal":{"name":"2018 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125956289","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: 6
A Picosecond Pulse generator Using SRD diodes: Design, Analysis, and Measurements 使用SRD二极管的皮秒脉冲发生器:设计、分析和测量
2018 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium) Pub Date : 2018-07-01 DOI: 10.1109/USNC-URSI.2018.8602738
D. Oloumi, E. Fear
{"title":"A Picosecond Pulse generator Using SRD diodes: Design, Analysis, and Measurements","authors":"D. Oloumi, E. Fear","doi":"10.1109/USNC-URSI.2018.8602738","DOIUrl":"https://doi.org/10.1109/USNC-URSI.2018.8602738","url":null,"abstract":"In this paper, generating a sub-nanosecond Gaussian pulse using a very simple circuit configuration is demonstrated. The design is based on SRD diodes fed with a sinusoidal input. The generated pulse is a Gaussian with a full width at half maximum (FWHM) of 286ps and 1.586V of amplitude. Circuit operation is studied through multiple simulations and measurements.","PeriodicalId":203781,"journal":{"name":"2018 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125823861","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: 10
A New Parameter Estimation Method for Frequency Hopping Signals 一种新的跳频信号参数估计方法
2018 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium) Pub Date : 2018-07-01 DOI: 10.1109/USNC-URSI.2018.8602599
Yibing Li, Xiaochen Guo, Fei Yu, Qian Sun
{"title":"A New Parameter Estimation Method for Frequency Hopping Signals","authors":"Yibing Li, Xiaochen Guo, Fei Yu, Qian Sun","doi":"10.1109/USNC-URSI.2018.8602599","DOIUrl":"https://doi.org/10.1109/USNC-URSI.2018.8602599","url":null,"abstract":"A parameter estimation algorithm for multiple frequency-hopping (FH) signals based on maximum energy difference is proposed in this paper. First, the time-frequency (TF) matrix is obtained by TF analysis such as short-time Fourier transform (STFT) and smoothed pseudo wigner-ville distribution (SPWVD). Then, the carrier frequency and the TF data with valid frequency are determined according to the distribution of energy. Next, the number of signal segments and window length in each nonzero row of the TF data is obtained. Finally, hopping time and hop cycle are estimated based on the maximum energy difference. Simulation results indicate that the proposed algorithm has better anti-noise performance than the TF pattern modification method and the STFT-SPWVD method. The new method is suitable for asynchronous and synchronous network.","PeriodicalId":203781,"journal":{"name":"2018 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"55 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114125261","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
Study on Dual-Band Four-Port MIMO Antenna with High Isolation 双频高隔离四端口MIMO天线的研究
2018 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium) Pub Date : 2018-07-01 DOI: 10.1109/USNC-URSI.2018.8602804
Zhigang Lu, Yizhong Wu
{"title":"Study on Dual-Band Four-Port MIMO Antenna with High Isolation","authors":"Zhigang Lu, Yizhong Wu","doi":"10.1109/USNC-URSI.2018.8602804","DOIUrl":"https://doi.org/10.1109/USNC-URSI.2018.8602804","url":null,"abstract":"A dual-band four-port MIMO antenna with high isolation is proposed in this paper. The two operating bands of the MIMO antenna were located at 3.5-GHz and 4.9-GHz. The antenna was composed of four ring monopole elements with microstrip-fed, which were symmetrical placed on the substrate of the antenna. Meanwhile, the rectangle slot, the protuberance, and the modified serpentine structure were introduced into the antenna to enhance the isolation between each monopole element. This letter reports the processes of the design and the experimental test for this MIMO antenna. From the experimental results, less than −15dB isolation were obtained within the operation bandwidth, which is in accordance with the simulation results.","PeriodicalId":203781,"journal":{"name":"2018 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114154553","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
Assessment of the Hazard of the Radiation of Wireless Communication Devices in Humanitarian Demining 人道主义排雷中无线通信设备辐射危害的评估
2018 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium) Pub Date : 2018-07-01 DOI: 10.1109/USNC-URSI.2018.8602631
J. Pantoja, F. Vega, F. Roman
{"title":"Assessment of the Hazard of the Radiation of Wireless Communication Devices in Humanitarian Demining","authors":"J. Pantoja, F. Vega, F. Roman","doi":"10.1109/USNC-URSI.2018.8602631","DOIUrl":"https://doi.org/10.1109/USNC-URSI.2018.8602631","url":null,"abstract":"In this document, the hazard of unintended activation of electric IEDs due to the radiated power of wireless communications devices is assessed. The variability of the firing circuit of IEDs is considered using Monte Carlo technique. Four communication services are considered: VHF and UHF mobile radio and GSM cellular mobile at 850 MHz and 1900 MHz. The expected induced power in the IEDs due to each disturbance is compared with the detonation threshold for different scenarios of transmitted power and distances.","PeriodicalId":203781,"journal":{"name":"2018 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129040701","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
Balun Bandpass Low-Noise Amplifier in GaAs 砷化镓中的巴伦带通低噪声放大器
2018 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium) Pub Date : 2018-07-01 DOI: 10.1109/USNC-URSI.2018.8602912
Chia-Feng Chang, Yo-Shen Lin
{"title":"Balun Bandpass Low-Noise Amplifier in GaAs","authors":"Chia-Feng Chang, Yo-Shen Lin","doi":"10.1109/USNC-URSI.2018.8602912","DOIUrl":"https://doi.org/10.1109/USNC-URSI.2018.8602912","url":null,"abstract":"In this work, the design of an on-chip balun bandpass low-noise amplifier (LNA) is proposed so as to achieve the functional integration of balun, bandpass filter, and LNA in a compact circuit structure. Specifically, the input matching network of the LNA is designed as a bandpass filter while its output matching network is realized with a balun. The resulted multi-functional circuit effectively reduces the circuit size and cost of RF front-end circuitry. The proposed balun bandpass LNA is implemented using a commercial GaAs pHEMT process. The measured in-band small signal gain is within 11.2±0.35 dB from 5.4 to 6 GHz, and the in-band input and output return losses are all better than 10.8 dB. The measured in-band noise figure is better than 6.2 dB with a minimum noise figure of 4.9 dB at 6 GHz. The measured in-band amplitude imbalance between the balanced output ports is with 1.2 dB while the inband phase imbalance is within 6.4 degree. Notably, the proposed balun bandpass LNA achieves 30-dBc stopband rejection from DC to 4.3 GHz and from 8.3 to 20 GHz.","PeriodicalId":203781,"journal":{"name":"2018 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124578907","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
Fusion of Propagation Observations and Numerical Weather Prediction via Warping Functions 基于翘曲函数的传播观测与数值天气预报融合
2018 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium) Pub Date : 2018-07-01 DOI: 10.1109/USNC-URSI.2018.8602933
T. Rogers, Chelsea Mediavilla
{"title":"Fusion of Propagation Observations and Numerical Weather Prediction via Warping Functions","authors":"T. Rogers, Chelsea Mediavilla","doi":"10.1109/USNC-URSI.2018.8602933","DOIUrl":"https://doi.org/10.1109/USNC-URSI.2018.8602933","url":null,"abstract":"The inverse problem in trans-horizon electromagnetic (EM) propagation has been solved by mapping modeled refractive environments ($mathcal{M}$ ‘s) into the space of observed propagation d and selecting the best $mathcal{M}$ based on goodness-of-fit. Up to the present, parametric ad hoc refractivity models have been used, e.g., [2]–[4]. We modify this approach by using an a priori $mathcal{M}$ from numerical weather prediction (NWP) and solving for warping coefficients (v's) within a 2-dimensional variational (2DVAR) analysis.","PeriodicalId":203781,"journal":{"name":"2018 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"28 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127633653","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
Direction Finding Algorithm for Noncircular Signals in the Presence of Unknown Mutual Coupling 存在未知互耦的非圆信号测向算法
2018 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium) Pub Date : 2018-07-01 DOI: 10.1109/USNC-URSI.2018.8602803
Jian Xie, Ling Wang, Wei Zhang, Xin Yang
{"title":"Direction Finding Algorithm for Noncircular Signals in the Presence of Unknown Mutual Coupling","authors":"Jian Xie, Ling Wang, Wei Zhang, Xin Yang","doi":"10.1109/USNC-URSI.2018.8602803","DOIUrl":"https://doi.org/10.1109/USNC-URSI.2018.8602803","url":null,"abstract":"Base on the fourth-order cumulants, a direction finding algorithm for noncircular sources under unknown mutual coupling is proposed. Utilizing the symmetric Toeplitz structure of the mutual coupling matrix and the noncircularity of the sources, a closed form solution for the DOA estimation is obtained by constructing a series of cumulant matrices. According to the simulation results, the proposed algorithm is effective in the presence of unknown mutual coupling. Moreover, it enjoys better estimation performance via utilizing the noncircularity of the sources.","PeriodicalId":203781,"journal":{"name":"2018 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127710856","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
On the Suitability of Ionospheric Gradient Estimation Techniques for IRNSS Based GBAS Applications 基于IRNSS的GBAS应用电离层梯度估计技术的适用性研究
2018 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium) Pub Date : 2018-07-01 DOI: 10.1109/USNC-URSI.2018.8602875
S. R. Ammana, A. D. Sarma
{"title":"On the Suitability of Ionospheric Gradient Estimation Techniques for IRNSS Based GBAS Applications","authors":"S. R. Ammana, A. D. Sarma","doi":"10.1109/USNC-URSI.2018.8602875","DOIUrl":"https://doi.org/10.1109/USNC-URSI.2018.8602875","url":null,"abstract":"Time-Step method and Station-Pair method are prominent techniques for estimation of spatial gradients. Since GBAS is meant to serve a limited area of about 50km of an airport for aircraft Precision Approach and landing, these two methods were considered for gradient estimation within the GBAS service area. Much of the work on these techniques has been reported for GPS-based GBAS applications. In this paper, the suitability of these methods to IRNSS-based GBAS applications is investigated. It is observed that since IRNSS satellites are either GEO or GSO, the time interval (At), of Time-Step method should be significantly high (30min for GSO), to obtain gradient data for GBAS’ service area. With the Station-Pair method, a dense network of stations, each separated by not more than 1–2 kms is required.","PeriodicalId":203781,"journal":{"name":"2018 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133041240","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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