Pub Date : 2016-03-13DOI: 10.1109/ROPACES.2016.7465329
H. Alroughani, J. Ethier, D. McNamara
Existing characteristic mode tracking algorithms experience difficulties when used for dielectric objects due to the presence of non-physical modes when surface integral equation models are used. It is shown how these problems can be circumvented using a pragmatic approach.
{"title":"Numerical experiments in tracking the characteristic modes of dielectric objects","authors":"H. Alroughani, J. Ethier, D. McNamara","doi":"10.1109/ROPACES.2016.7465329","DOIUrl":"https://doi.org/10.1109/ROPACES.2016.7465329","url":null,"abstract":"Existing characteristic mode tracking algorithms experience difficulties when used for dielectric objects due to the presence of non-physical modes when surface integral equation models are used. It is shown how these problems can be circumvented using a pragmatic approach.","PeriodicalId":101990,"journal":{"name":"2016 IEEE/ACES International Conference on Wireless Information Technology and Systems (ICWITS) and Applied Computational Electromagnetics (ACES)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126637937","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 : 2016-03-13DOI: 10.1109/ROPACES.2016.7465335
Y. Madany, H. Elkamchouchi, Bishoy I. Halim
Metamaterials is a rapidly evolving field of research that covers a vast range of artificial structures and electro-magnetic properties. Resulting from this, there is no universally accepted definition of what is meant by a meta-material. It is generally agreed that metamaterials are artificial media with unusual properties not found in their constituent materials. The composite right / left-handed transmission lines (CRLH-TLs) are the metamaterials with both of the RH and the LH properties. In this paper, study and design of smart frequency agility control system has been introduced and investigated. The proposed CRLH-TL has been evaluated using a commercial software. The final proposed system with smart control unit has been fabricated and the scattering characteristics have been illustrated using network analyzer to meet the multifunction requirements for communication and radar applications.
{"title":"Investigation and design of smart frequency agility control system using compact CRLH-TL for communication and radar applications","authors":"Y. Madany, H. Elkamchouchi, Bishoy I. Halim","doi":"10.1109/ROPACES.2016.7465335","DOIUrl":"https://doi.org/10.1109/ROPACES.2016.7465335","url":null,"abstract":"Metamaterials is a rapidly evolving field of research that covers a vast range of artificial structures and electro-magnetic properties. Resulting from this, there is no universally accepted definition of what is meant by a meta-material. It is generally agreed that metamaterials are artificial media with unusual properties not found in their constituent materials. The composite right / left-handed transmission lines (CRLH-TLs) are the metamaterials with both of the RH and the LH properties. In this paper, study and design of smart frequency agility control system has been introduced and investigated. The proposed CRLH-TL has been evaluated using a commercial software. The final proposed system with smart control unit has been fabricated and the scattering characteristics have been illustrated using network analyzer to meet the multifunction requirements for communication and radar applications.","PeriodicalId":101990,"journal":{"name":"2016 IEEE/ACES International Conference on Wireless Information Technology and Systems (ICWITS) and Applied Computational Electromagnetics (ACES)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126405191","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 : 2016-03-13DOI: 10.1109/ROPACES.2016.7465304
F. Nekoogar, F. Dowla
Advanced passive RFID tags integrated with a suite of sensors can play a significant role in the Internet of Things (IOT) ecosystem for longer range sensor applications. Although readers equipped with IPv6 communications capability allow the transfer of data from passive tags to the IOT world, reliable remote powering of such tag/sensor units still is a limiting factor in harsh propagation environments. In this paper we present a hybrid UWB/UHF signaling for reliable long-range tag-reader communications in challenging environments such as reflective, absorptive, and cluttered channels.
{"title":"Passive RFID for IOT using UWB/UHF hybrid signaling","authors":"F. Nekoogar, F. Dowla","doi":"10.1109/ROPACES.2016.7465304","DOIUrl":"https://doi.org/10.1109/ROPACES.2016.7465304","url":null,"abstract":"Advanced passive RFID tags integrated with a suite of sensors can play a significant role in the Internet of Things (IOT) ecosystem for longer range sensor applications. Although readers equipped with IPv6 communications capability allow the transfer of data from passive tags to the IOT world, reliable remote powering of such tag/sensor units still is a limiting factor in harsh propagation environments. In this paper we present a hybrid UWB/UHF signaling for reliable long-range tag-reader communications in challenging environments such as reflective, absorptive, and cluttered channels.","PeriodicalId":101990,"journal":{"name":"2016 IEEE/ACES International Conference on Wireless Information Technology and Systems (ICWITS) and Applied Computational Electromagnetics (ACES)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116100024","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 : 2016-03-13DOI: 10.1109/ROPACES.2016.7465376
Y. Mao, T. Jiang, A. Elsherbeni
An improved absorbing boundary condition for terminating finite-difference time-domain (FDTD) simulations, based on the surface impedance concept, is proposed in this paper. The improved method uses E component collocation instead of the H component collocation as in [1]. The performance of the two SIABCs and 10-layers CPML are discussed with a 3D example which employed these absorbing boundary conditions (ABCs) in the calculation of RCS of a dielectric sphere. The computer resources requirements are also discussed. The compared result indicates that both the SIABCs have a comparable absorbing performance with 10-layers CPML, and the E component collocated SIABC has a better absorbing performance relative to H component collocated SIABC.
{"title":"Improved surface impedance absorbing boundary for FDTD method","authors":"Y. Mao, T. Jiang, A. Elsherbeni","doi":"10.1109/ROPACES.2016.7465376","DOIUrl":"https://doi.org/10.1109/ROPACES.2016.7465376","url":null,"abstract":"An improved absorbing boundary condition for terminating finite-difference time-domain (FDTD) simulations, based on the surface impedance concept, is proposed in this paper. The improved method uses E component collocation instead of the H component collocation as in [1]. The performance of the two SIABCs and 10-layers CPML are discussed with a 3D example which employed these absorbing boundary conditions (ABCs) in the calculation of RCS of a dielectric sphere. The computer resources requirements are also discussed. The compared result indicates that both the SIABCs have a comparable absorbing performance with 10-layers CPML, and the E component collocated SIABC has a better absorbing performance relative to H component collocated SIABC.","PeriodicalId":101990,"journal":{"name":"2016 IEEE/ACES International Conference on Wireless Information Technology and Systems (ICWITS) and Applied Computational Electromagnetics (ACES)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123794339","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 : 2016-03-13DOI: 10.1109/ROPACES.2016.7465402
Varunkumar Singh
This work presents a full vectorial Yee's mesh based modesolver for anisotropic waveguides with five term Hermitian permittivity tensor and interpolation to compensate for the non-collocation of electric fields. The earlier anisotropic modesolvers with non diagonal permittivity tensor use simple finite difference, finite element or plane wave method for mode solving, also the earlier works on Yee's mesh based modesolver do not consider five term permittivity tensor. However in this work five term hermitian permittivity tensor along with electric field interpolation has been incorporated in Yee's mesh based modesolver and effective refractive index values have been shown as well as compared with previous work.
{"title":"A Yee's mesh based modesolver for anisotropic waveguides","authors":"Varunkumar Singh","doi":"10.1109/ROPACES.2016.7465402","DOIUrl":"https://doi.org/10.1109/ROPACES.2016.7465402","url":null,"abstract":"This work presents a full vectorial Yee's mesh based modesolver for anisotropic waveguides with five term Hermitian permittivity tensor and interpolation to compensate for the non-collocation of electric fields. The earlier anisotropic modesolvers with non diagonal permittivity tensor use simple finite difference, finite element or plane wave method for mode solving, also the earlier works on Yee's mesh based modesolver do not consider five term permittivity tensor. However in this work five term hermitian permittivity tensor along with electric field interpolation has been incorporated in Yee's mesh based modesolver and effective refractive index values have been shown as well as compared with previous work.","PeriodicalId":101990,"journal":{"name":"2016 IEEE/ACES International Conference on Wireless Information Technology and Systems (ICWITS) and Applied Computational Electromagnetics (ACES)","volume":"140 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122913654","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 : 2016-03-13DOI: 10.1109/ROPACES.2016.7465487
M. Grinfeld, Jason McDonald, J. Niederhaus
We explore how reliable the ALEGRA MHD code is in its static limit. Also, we explore (in the quasi-static approximation) the process of evolution of the magnetic fields inside and outside an inclusion and the parameters for which the quasi-static approach provides for self-consistent results.
{"title":"ALEGRA based computation of magnetostatic configurations","authors":"M. Grinfeld, Jason McDonald, J. Niederhaus","doi":"10.1109/ROPACES.2016.7465487","DOIUrl":"https://doi.org/10.1109/ROPACES.2016.7465487","url":null,"abstract":"We explore how reliable the ALEGRA MHD code is in its static limit. Also, we explore (in the quasi-static approximation) the process of evolution of the magnetic fields inside and outside an inclusion and the parameters for which the quasi-static approach provides for self-consistent results.","PeriodicalId":101990,"journal":{"name":"2016 IEEE/ACES International Conference on Wireless Information Technology and Systems (ICWITS) and Applied Computational Electromagnetics (ACES)","volume":"422 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132553145","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 : 2016-03-13DOI: 10.1109/ROPACES.2016.7465467
Z. He, R. Chen
The parabolic equation (PE) method has been used as an efficient tool to analyze the bistatic radar cross section (RCS) of electrically large targets. By using the monostatic-bistatic equivalence, the monostatic scattering properties can be exploited from the bistatic information of some neighboring scattered angles. Thus a lot of simulations of required incident angles can be avoided. Moreover, more accurate monostatic RCS results can be obtainedfor the proposed method than the direct simulation for different incident angles when the scatterer has large changes along the paraxial direction. Numerical results are given to demonstrate that the proposed method is efficient for the analysis of monostatic scattering properties of electrically large targets.
{"title":"Efficient monostatic radar cross section calculationfor parabolic equation method","authors":"Z. He, R. Chen","doi":"10.1109/ROPACES.2016.7465467","DOIUrl":"https://doi.org/10.1109/ROPACES.2016.7465467","url":null,"abstract":"The parabolic equation (PE) method has been used as an efficient tool to analyze the bistatic radar cross section (RCS) of electrically large targets. By using the monostatic-bistatic equivalence, the monostatic scattering properties can be exploited from the bistatic information of some neighboring scattered angles. Thus a lot of simulations of required incident angles can be avoided. Moreover, more accurate monostatic RCS results can be obtainedfor the proposed method than the direct simulation for different incident angles when the scatterer has large changes along the paraxial direction. Numerical results are given to demonstrate that the proposed method is efficient for the analysis of monostatic scattering properties of electrically large targets.","PeriodicalId":101990,"journal":{"name":"2016 IEEE/ACES International Conference on Wireless Information Technology and Systems (ICWITS) and Applied Computational Electromagnetics (ACES)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132060779","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 : 2016-03-13DOI: 10.1109/ROPACES.2016.7465450
K. Buchanan, Carlos Flores-Molina, J. Rockway
This work examines the sidelobe behavior of canonical polygons and associated fractal topologies for planar random arrays. The array manifolds are composed of uniformly distributed isotropic radiators densely populated to examine the limiting behaviors of each shape. A stochastic mathematical analysis is used to derive the mean radiation pattern. Numerical experiments are run to demonstrate scanning and to compare the patterns between the canonical shapes and their associated fractal forms. The results show that increasing the number of sharp edges either by additional sides or fractalization leads to higher sidelobe levels.
{"title":"Investigation of sidelobe behavior for canonical polygon and fractal random array topologies","authors":"K. Buchanan, Carlos Flores-Molina, J. Rockway","doi":"10.1109/ROPACES.2016.7465450","DOIUrl":"https://doi.org/10.1109/ROPACES.2016.7465450","url":null,"abstract":"This work examines the sidelobe behavior of canonical polygons and associated fractal topologies for planar random arrays. The array manifolds are composed of uniformly distributed isotropic radiators densely populated to examine the limiting behaviors of each shape. A stochastic mathematical analysis is used to derive the mean radiation pattern. Numerical experiments are run to demonstrate scanning and to compare the patterns between the canonical shapes and their associated fractal forms. The results show that increasing the number of sharp edges either by additional sides or fractalization leads to higher sidelobe levels.","PeriodicalId":101990,"journal":{"name":"2016 IEEE/ACES International Conference on Wireless Information Technology and Systems (ICWITS) and Applied Computational Electromagnetics (ACES)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131649043","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 : 2016-03-13DOI: 10.1109/ROPACES.2016.7465439
D. Pommerenke, J. Fan, J. Drewniak
Simulation of system level electrostatic discharge (ESD) is challenging due to the complexity of electronic systems, missing soft failure models for ICs and the modeling of arcing. This paper details these difficulties and points at examples of successful solutions for modeling ESD generators in SPICE and full wave, modeling of arc behavior, and simulation of ESD into products causing soft-failures.
{"title":"Simulation challenges in system level electrostatic discharge modeling","authors":"D. Pommerenke, J. Fan, J. Drewniak","doi":"10.1109/ROPACES.2016.7465439","DOIUrl":"https://doi.org/10.1109/ROPACES.2016.7465439","url":null,"abstract":"Simulation of system level electrostatic discharge (ESD) is challenging due to the complexity of electronic systems, missing soft failure models for ICs and the modeling of arcing. This paper details these difficulties and points at examples of successful solutions for modeling ESD generators in SPICE and full wave, modeling of arc behavior, and simulation of ESD into products causing soft-failures.","PeriodicalId":101990,"journal":{"name":"2016 IEEE/ACES International Conference on Wireless Information Technology and Systems (ICWITS) and Applied Computational Electromagnetics (ACES)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133266439","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 : 2016-03-13DOI: 10.1109/ROPACES.2016.7465379
L. Tamaye, R. Perron, D. Bibb, Jason Tanabe, Fernan Suela, G. Huang, M. Iskander
A phantom cross section of a human thorax was developed to evaluate the sensitivity of the Cardiopulmonary Stethoscope (CP-Stethoscope) system to detect changes in lung water content. Phantom heart and muscle tissues were also developed with dielectric properties similar to human tissue and sponges were used to model lung tissues. A structure was also built to evenly distribute water over the sponges. A 2port to 8port RF switch was developed to switch the sensors between transmitter and receiver configurations and examine sensitivity of measurement to sensors locations. Changes in the phase of the transmitted signal were correlated to the variation in the amount of the water inserted into the sponges. This experiment was used to examine the sensitivity of the CP-Stethoscope system and ability to detect water gradient in the lung. Results show that significant changes in the phase of the transmission coefficient are detectable as water migrates from the top surface to the bottom of the phantom model.
{"title":"CP-Stethoscope: Phantom model experiments","authors":"L. Tamaye, R. Perron, D. Bibb, Jason Tanabe, Fernan Suela, G. Huang, M. Iskander","doi":"10.1109/ROPACES.2016.7465379","DOIUrl":"https://doi.org/10.1109/ROPACES.2016.7465379","url":null,"abstract":"A phantom cross section of a human thorax was developed to evaluate the sensitivity of the Cardiopulmonary Stethoscope (CP-Stethoscope) system to detect changes in lung water content. Phantom heart and muscle tissues were also developed with dielectric properties similar to human tissue and sponges were used to model lung tissues. A structure was also built to evenly distribute water over the sponges. A 2port to 8port RF switch was developed to switch the sensors between transmitter and receiver configurations and examine sensitivity of measurement to sensors locations. Changes in the phase of the transmitted signal were correlated to the variation in the amount of the water inserted into the sponges. This experiment was used to examine the sensitivity of the CP-Stethoscope system and ability to detect water gradient in the lung. Results show that significant changes in the phase of the transmission coefficient are detectable as water migrates from the top surface to the bottom of the phantom model.","PeriodicalId":101990,"journal":{"name":"2016 IEEE/ACES International Conference on Wireless Information Technology and Systems (ICWITS) and Applied Computational Electromagnetics (ACES)","volume":"63 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114119792","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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