Pub Date : 2019-07-01DOI: 10.1109/USNC-URSI.2019.8861991
Serge R. Mghabghab, J. Nanzer
The effects of noise-like interference on spectrally-sparse, high-accuracy microwave ranging for coherent distributed antenna arrays are analyzed in this work. Coherent operation between separate nodes in distributed arrays is dependent on the level of accuracy in estimating the internode distances. Internode ranging accuracy is mainly affected by the waveform characteristics along with the signal-to-noise ratio (SNR), or the signal-to-interference-plus-noise ratio (SINR) in the case of added interference. In this work it is shown that the optimal bandwidth of the ranging waveform (a spectrally-sparse, two-tone signal) is dependent on the spectral shape of the interference.
{"title":"Effects of Spectral Interference on High-Accuracy Ranging in Coherent Distributed Arrays","authors":"Serge R. Mghabghab, J. Nanzer","doi":"10.1109/USNC-URSI.2019.8861991","DOIUrl":"https://doi.org/10.1109/USNC-URSI.2019.8861991","url":null,"abstract":"The effects of noise-like interference on spectrally-sparse, high-accuracy microwave ranging for coherent distributed antenna arrays are analyzed in this work. Coherent operation between separate nodes in distributed arrays is dependent on the level of accuracy in estimating the internode distances. Internode ranging accuracy is mainly affected by the waveform characteristics along with the signal-to-noise ratio (SNR), or the signal-to-interference-plus-noise ratio (SINR) in the case of added interference. In this work it is shown that the optimal bandwidth of the ranging waveform (a spectrally-sparse, two-tone signal) is dependent on the spectral shape of the interference.","PeriodicalId":383603,"journal":{"name":"2019 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114056250","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}
Pub Date : 2019-07-01DOI: 10.1109/USNC-URSI.2019.8861711
S. Campione, A. Pung, L. Warne, W. Langston, Ting Mei
Electromagnetic shields are usually employed to protect cables and other devices; however, these are generally not perfect, and may permit external magnetic and electric fields to penetrate into the interior regions of the cable, inducing unwanted current and voltages. The aim of this paper is to verify a circuit model tool with our previously proposed analytical model [1] for evaluating currents and voltages induced in the inner conductor of braided-shield cables. This circuit model will enable coupling between electromagnetic and circuit simulations.
{"title":"Modeling shielded cables in Xyce based on transmission-line theory","authors":"S. Campione, A. Pung, L. Warne, W. Langston, Ting Mei","doi":"10.1109/USNC-URSI.2019.8861711","DOIUrl":"https://doi.org/10.1109/USNC-URSI.2019.8861711","url":null,"abstract":"Electromagnetic shields are usually employed to protect cables and other devices; however, these are generally not perfect, and may permit external magnetic and electric fields to penetrate into the interior regions of the cable, inducing unwanted current and voltages. The aim of this paper is to verify a circuit model tool with our previously proposed analytical model [1] for evaluating currents and voltages induced in the inner conductor of braided-shield cables. This circuit model will enable coupling between electromagnetic and circuit simulations.","PeriodicalId":383603,"journal":{"name":"2019 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127789648","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}
Pub Date : 2019-07-01DOI: 10.1109/USNC-URSI.2019.8861706
N. Zhou, Terry Smith, G. Waldschmidt, A. Nassiri, T. Wong
A photonic bandgap (PBG) cavity resonator encompassing a metamaterial with a sparsely populated array of metallic rods has been arrived at for potential application in future generations of particle accelerators. The star-shape array was evolved from a two-dimensional triangle lattice with certain lattice points vacant. Optimized for the TM01 – like mode with the electric field concentrated at the center while the higher-order modes (HOMs) are constrained from the center, the cavity is excited by a standard rectangular waveguide. Input matching is accomplished by fine tuning in the positions of selected metal rods in the two outer layers. The cavity-waveguide assembly was fabricated with copper and cold tested for resonance characteristics. A return loss of over 20 dB at the designed resonance frequency of 11.41 GHz was measured. A bead pull experiment was performed to confirm the uniformity of the field along the axis of the cavity resonator.
{"title":"Dislocation of Lattice Points for Impedance Matching of a Photonic Bandgap Cavity Resonator","authors":"N. Zhou, Terry Smith, G. Waldschmidt, A. Nassiri, T. Wong","doi":"10.1109/USNC-URSI.2019.8861706","DOIUrl":"https://doi.org/10.1109/USNC-URSI.2019.8861706","url":null,"abstract":"A photonic bandgap (PBG) cavity resonator encompassing a metamaterial with a sparsely populated array of metallic rods has been arrived at for potential application in future generations of particle accelerators. The star-shape array was evolved from a two-dimensional triangle lattice with certain lattice points vacant. Optimized for the TM01 – like mode with the electric field concentrated at the center while the higher-order modes (HOMs) are constrained from the center, the cavity is excited by a standard rectangular waveguide. Input matching is accomplished by fine tuning in the positions of selected metal rods in the two outer layers. The cavity-waveguide assembly was fabricated with copper and cold tested for resonance characteristics. A return loss of over 20 dB at the designed resonance frequency of 11.41 GHz was measured. A bead pull experiment was performed to confirm the uniformity of the field along the axis of the cavity resonator.","PeriodicalId":383603,"journal":{"name":"2019 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130668244","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}
Pub Date : 2019-07-01DOI: 10.1109/USNC-URSI.2019.8861986
Nidhi Pandit, R. Jaiswal, N. Pathak
This paper reports the design, analysis, and characterization of a dual-band filter using the concept of plasmonic metamaterial. The designed filter consists of a multi-mode butterfly shape resonator, which is directly coupled through plasmonic transmission line with coupling gap g. The operational mechanism of the filter has been explained through the even-odd mode analysis. The designed filter has dual-band response with the center frequencies of 1.78 GHz and 2.59 GHz. Measured insertion losses are ~1.5dB and return loss are better than 15dB for both the pass-bands. The proposed filter will pave an important role in the design and development of plasmonic circuits and systems.
{"title":"Plasmonic Metamaterial Based Dual-Band Filter","authors":"Nidhi Pandit, R. Jaiswal, N. Pathak","doi":"10.1109/USNC-URSI.2019.8861986","DOIUrl":"https://doi.org/10.1109/USNC-URSI.2019.8861986","url":null,"abstract":"This paper reports the design, analysis, and characterization of a dual-band filter using the concept of plasmonic metamaterial. The designed filter consists of a multi-mode butterfly shape resonator, which is directly coupled through plasmonic transmission line with coupling gap g. The operational mechanism of the filter has been explained through the even-odd mode analysis. The designed filter has dual-band response with the center frequencies of 1.78 GHz and 2.59 GHz. Measured insertion losses are ~1.5dB and return loss are better than 15dB for both the pass-bands. The proposed filter will pave an important role in the design and development of plasmonic circuits and systems.","PeriodicalId":383603,"journal":{"name":"2019 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133687886","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}
Pub Date : 2019-07-01DOI: 10.1109/USNC-URSI.2019.8861712
Peng‐Wei Liu, Wensheng Zhao, Gaofeng Wang
In this paper, the optimal repeater number and size are analyzed for multi-walled carbon nanotube interconnects by using the particle swarm optimization (PSO) algorithm. Genetic algorithm (GA) is also used to verify the corresponding results. Further, the neural network (NN) is trained to facilitate the EDA process. It is found that the computational time can be dramatically reduced with the implementation of NN.
{"title":"A Repeater Optimization Methodology for Global Multi-Walled Carbon Nanotube Interconnects","authors":"Peng‐Wei Liu, Wensheng Zhao, Gaofeng Wang","doi":"10.1109/USNC-URSI.2019.8861712","DOIUrl":"https://doi.org/10.1109/USNC-URSI.2019.8861712","url":null,"abstract":"In this paper, the optimal repeater number and size are analyzed for multi-walled carbon nanotube interconnects by using the particle swarm optimization (PSO) algorithm. Genetic algorithm (GA) is also used to verify the corresponding results. Further, the neural network (NN) is trained to facilitate the EDA process. It is found that the computational time can be dramatically reduced with the implementation of NN.","PeriodicalId":383603,"journal":{"name":"2019 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134441705","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}
Pub Date : 2019-07-01DOI: 10.1109/USNC-URSI.2019.8861708
Kai Yao, Shengchang Lan, Linting Ye, Guiyuan Zhang, Gang Lu, Lijia Chen
This paper describes a scalable polarization reconfigurable phased array antenna system. The system was realized by using a beamformer and designing a more efficient and flexible power supply and control system, which could be exceedingly helpful to achieve a more flexible ground station design and satellite communication test. As a result, more flexible beam scanning and higher gain could be achieved. The design was simulated by CST Microwave Studio. The complexity of the system was significantly reduced by using the modular design of the active phase control structure.
{"title":"Design of an Active Scalable Phased Array Antenna System","authors":"Kai Yao, Shengchang Lan, Linting Ye, Guiyuan Zhang, Gang Lu, Lijia Chen","doi":"10.1109/USNC-URSI.2019.8861708","DOIUrl":"https://doi.org/10.1109/USNC-URSI.2019.8861708","url":null,"abstract":"This paper describes a scalable polarization reconfigurable phased array antenna system. The system was realized by using a beamformer and designing a more efficient and flexible power supply and control system, which could be exceedingly helpful to achieve a more flexible ground station design and satellite communication test. As a result, more flexible beam scanning and higher gain could be achieved. The design was simulated by CST Microwave Studio. The complexity of the system was significantly reduced by using the modular design of the active phase control structure.","PeriodicalId":383603,"journal":{"name":"2019 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116175008","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}
Pub Date : 2019-07-01DOI: 10.1109/USNC-URSI.2019.8861701
V. Harid, M. Gołkowski, S. Gedney, R. Rorrer, M. Cohen, Nathan M. Opalinski, S. Patch
The problem of magnetic field penetration into a conductive enclosure due to a low frequency loop transmitter is considered using simulations and experiment. The problem is relevant for electromagnetic shielding, through bunker communications, through conductor imaging, and several related problems. The primary difficulty lies in the multiple spatial scales due to the large wavelengths in the exterior and interior air regions in contrast to the short wavelengths in the highly conductive shell region. Although analytical solutions are possible for spherical shields and other specific geometries, determining the penetration through realistic conductive shields requires a numerical approach. Typical finite element methods can be employed to the shielding problem, however, appropriately meshing the enclosure and the air regions can be difficult when the skin-depth and wavelength in the shell are much smaller than the dimensions of the enclosure. To alleviate the multi-scale and near-field nature of the problem, a high-order locally corrected Nyström scheme is utilized to solve a surface integral equation based on an Augmented Müller formulation. The Nyström-SIE method is ideally suited for shield modeling due to the low surface area to volume ratio of the shield and the exponential convergence properties of the code. To validate the theoretical predictions from the model an experiment using two loop antennas inside and outside a 1.2 m aluminum cube of 3 mm thickness is conducted. It is shown that the experimental results agree with numerical predictions.
{"title":"Modeling Low Frequency Magnetic Field Shielding using the Locally Corrected Nyström Method","authors":"V. Harid, M. Gołkowski, S. Gedney, R. Rorrer, M. Cohen, Nathan M. Opalinski, S. Patch","doi":"10.1109/USNC-URSI.2019.8861701","DOIUrl":"https://doi.org/10.1109/USNC-URSI.2019.8861701","url":null,"abstract":"The problem of magnetic field penetration into a conductive enclosure due to a low frequency loop transmitter is considered using simulations and experiment. The problem is relevant for electromagnetic shielding, through bunker communications, through conductor imaging, and several related problems. The primary difficulty lies in the multiple spatial scales due to the large wavelengths in the exterior and interior air regions in contrast to the short wavelengths in the highly conductive shell region. Although analytical solutions are possible for spherical shields and other specific geometries, determining the penetration through realistic conductive shields requires a numerical approach. Typical finite element methods can be employed to the shielding problem, however, appropriately meshing the enclosure and the air regions can be difficult when the skin-depth and wavelength in the shell are much smaller than the dimensions of the enclosure. To alleviate the multi-scale and near-field nature of the problem, a high-order locally corrected Nyström scheme is utilized to solve a surface integral equation based on an Augmented Müller formulation. The Nyström-SIE method is ideally suited for shield modeling due to the low surface area to volume ratio of the shield and the exponential convergence properties of the code. To validate the theoretical predictions from the model an experiment using two loop antennas inside and outside a 1.2 m aluminum cube of 3 mm thickness is conducted. It is shown that the experimental results agree with numerical predictions.","PeriodicalId":383603,"journal":{"name":"2019 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122963599","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}
Pub Date : 2019-07-01DOI: 10.1109/usnc-ursi.2019.8861973
Aqeela Saghir, Salman Arain, Abdul Quddious, S. Nikolaou, P. Vryonides
A simple design structure for a wideband bandpass filter (BPF) for 5G mm-wave applications is presented in this paper. Sharp skirt with good isolation level is demonstrated by using three pairs of parallel coupled lines (PCLs) and two open-ended stubs. A thorough mathematical derivation by adopting the even- and odd analysis is performed. The simulated and calculated results are in good agreement thus validating the proposed design.
{"title":"Wideband BPF for 5G mm-wave Applications with Detailed Extraction of Poles and Zeros","authors":"Aqeela Saghir, Salman Arain, Abdul Quddious, S. Nikolaou, P. Vryonides","doi":"10.1109/usnc-ursi.2019.8861973","DOIUrl":"https://doi.org/10.1109/usnc-ursi.2019.8861973","url":null,"abstract":"A simple design structure for a wideband bandpass filter (BPF) for 5G mm-wave applications is presented in this paper. Sharp skirt with good isolation level is demonstrated by using three pairs of parallel coupled lines (PCLs) and two open-ended stubs. A thorough mathematical derivation by adopting the even- and odd analysis is performed. The simulated and calculated results are in good agreement thus validating the proposed design.","PeriodicalId":383603,"journal":{"name":"2019 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121782296","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}
Pub Date : 2019-07-01DOI: 10.1109/USNC-URSI.2019.8861971
Christelle Nasrany, E. Nassar
This paper presents the design of a wideband insitu probe for measurement of the dielectric properties of soil. A three-dimensional FDTD simulation is used to predict the performance of the probe. The probe uses wideband printed dipole antenna for the transmitting and receiving antennas. The transmitting antenna radiates a differentiated Gaussian pulse that propagates in the soil under investigation. The soil parameters are extracted by mapping the measured complex S21 parameter to the values obtained from the FDTD simulation.
{"title":"Wideband In-Situ Measurement of Soil Electrical Parameters Using Planar Dipole Antennas","authors":"Christelle Nasrany, E. Nassar","doi":"10.1109/USNC-URSI.2019.8861971","DOIUrl":"https://doi.org/10.1109/USNC-URSI.2019.8861971","url":null,"abstract":"This paper presents the design of a wideband insitu probe for measurement of the dielectric properties of soil. A three-dimensional FDTD simulation is used to predict the performance of the probe. The probe uses wideband printed dipole antenna for the transmitting and receiving antennas. The transmitting antenna radiates a differentiated Gaussian pulse that propagates in the soil under investigation. The soil parameters are extracted by mapping the measured complex S21 parameter to the values obtained from the FDTD simulation.","PeriodicalId":383603,"journal":{"name":"2019 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121903257","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}
Pub Date : 2019-07-01DOI: 10.1109/USNC-URSI.2019.8861773
Yibing Li, Xiaoyu Gengv, Xiaochen Guo, Qian Sun, Fang Ye, T. Jiang
To improve the mixing matrix estimation performance of frequency hopping (FH) signals under the underdetermined blind source separation (UBSS) model, a new estimation method is proposed in this paper. First, time frequency (TF) analysis is utilized to obtain sparse TF data. Then, remove the low-energy TF points to avoid the effect of noises and reduce the amount of calculation. Next, detect the single source points (SSPs) with the derived formula. Finally, the dynamic data field clustering method is utilized to estimate the mixing matrix. The results of simulation experiments indicate that the proposed algorithm has better performance than the compared algorithms.
{"title":"Mixing Matrix Estimation of Frequency Hopping Signals Based on Single Source Points Detection","authors":"Yibing Li, Xiaoyu Gengv, Xiaochen Guo, Qian Sun, Fang Ye, T. Jiang","doi":"10.1109/USNC-URSI.2019.8861773","DOIUrl":"https://doi.org/10.1109/USNC-URSI.2019.8861773","url":null,"abstract":"To improve the mixing matrix estimation performance of frequency hopping (FH) signals under the underdetermined blind source separation (UBSS) model, a new estimation method is proposed in this paper. First, time frequency (TF) analysis is utilized to obtain sparse TF data. Then, remove the low-energy TF points to avoid the effect of noises and reduce the amount of calculation. Next, detect the single source points (SSPs) with the derived formula. Finally, the dynamic data field clustering method is utilized to estimate the mixing matrix. The results of simulation experiments indicate that the proposed algorithm has better performance than the compared algorithms.","PeriodicalId":383603,"journal":{"name":"2019 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128186343","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}
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