Pub Date : 2010-12-03DOI: 10.1109/ICEAA.2010.5652271
E. Gjonaj, T. Weiland
We describe the application of a high order Discontinuous Galerkin method in the time domain for Plasma Wakefield Acceleration (PWFA) simulations. The method is characterized by very low numerical dispersion errors. Furthermore, it is explicit by construction and easily parallelizable. It provides a much better alternative for particle based simulations compared to the conventional FDTD method. In particular, in the context of the emerging PWFA technology this approach may lead to a substantial reduction of simulation times.
{"title":"Particle based PWFA simulations using a Discontinuous Galerkin approach","authors":"E. Gjonaj, T. Weiland","doi":"10.1109/ICEAA.2010.5652271","DOIUrl":"https://doi.org/10.1109/ICEAA.2010.5652271","url":null,"abstract":"We describe the application of a high order Discontinuous Galerkin method in the time domain for Plasma Wakefield Acceleration (PWFA) simulations. The method is characterized by very low numerical dispersion errors. Furthermore, it is explicit by construction and easily parallelizable. It provides a much better alternative for particle based simulations compared to the conventional FDTD method. In particular, in the context of the emerging PWFA technology this approach may lead to a substantial reduction of simulation times.","PeriodicalId":375707,"journal":{"name":"2010 International Conference on Electromagnetics in Advanced Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130156383","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 : 2010-12-03DOI: 10.1109/ICEAA.2010.5653621
K. Yoon, T. Yun, H. Nam, Bong-Wook Jeon, Dong-Ki Lee, Jong‐Chul Lee
In this paper, a narrow bandwidth dual-band (DB) band-pass filter (BPR) with λg/2 open stubs using composite right/left-handed (CRLH) meta-material transmission lines is presented. A conventional narrow BPF with λg/2 open stubs is first designed using series λg/2 open stubs and λg/4 transmission lines. Then, a DB filter can then be easily implemented by replacing the microstrip lines with the CRLH transmission line unit-cells. The DB BPF using the CRLH transmission line unit-cell is experimentally demonstrated at dual operating frequencies of 5.8 GHz and 10.02 GHz. The experimental results are in a good agreement with the simulation results. The DB BPF shows 11 % and 13 % pass bandwidth at the center frequencies of 5.8 GHz and 10.02 GHz, respectively.
{"title":"Dual-band narrow bandwidth band-pass filter with λg/2 open stubs using the meta-materials technique","authors":"K. Yoon, T. Yun, H. Nam, Bong-Wook Jeon, Dong-Ki Lee, Jong‐Chul Lee","doi":"10.1109/ICEAA.2010.5653621","DOIUrl":"https://doi.org/10.1109/ICEAA.2010.5653621","url":null,"abstract":"In this paper, a narrow bandwidth dual-band (DB) band-pass filter (BPR) with λg/2 open stubs using composite right/left-handed (CRLH) meta-material transmission lines is presented. A conventional narrow BPF with λg/2 open stubs is first designed using series λg/2 open stubs and λg/4 transmission lines. Then, a DB filter can then be easily implemented by replacing the microstrip lines with the CRLH transmission line unit-cells. The DB BPF using the CRLH transmission line unit-cell is experimentally demonstrated at dual operating frequencies of 5.8 GHz and 10.02 GHz. The experimental results are in a good agreement with the simulation results. The DB BPF shows 11 % and 13 % pass bandwidth at the center frequencies of 5.8 GHz and 10.02 GHz, respectively.","PeriodicalId":375707,"journal":{"name":"2010 International Conference on Electromagnetics in Advanced Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130768820","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 : 2010-12-03DOI: 10.1109/ICEAA.2010.5651448
K. Sakakibara, H. Sano, N. Kikuma, H. Hirayama
A mechanically-controlled phase shifter of left-handed waveguide is developed for beam-scanning slot array antennas. A delay line using similar periodic structures of right-handed waveguide is also developed for grating lobe suppression of slot array antennas with travelling-wave excitation. The left-handed waveguide is composed of periodic structures as the pair of an inductive iris for shunt inductance and a short stub for series capacitance. The delay line of the right-handed waveguide is composed of a capacitive iris for shunt capacitance and a shorter short stub for series inductance. Dispersion diagram is estimated by Bloch analysis in the design. Left-handed phenomenon with phase variation of mechanically-controlled phase shifter and shortening wavelength due to the delay line are confirmed in the experiments.
{"title":"Mechanically-controlled phase shifter of left-handed waveguide for beam-scanning slot array antennas","authors":"K. Sakakibara, H. Sano, N. Kikuma, H. Hirayama","doi":"10.1109/ICEAA.2010.5651448","DOIUrl":"https://doi.org/10.1109/ICEAA.2010.5651448","url":null,"abstract":"A mechanically-controlled phase shifter of left-handed waveguide is developed for beam-scanning slot array antennas. A delay line using similar periodic structures of right-handed waveguide is also developed for grating lobe suppression of slot array antennas with travelling-wave excitation. The left-handed waveguide is composed of periodic structures as the pair of an inductive iris for shunt inductance and a short stub for series capacitance. The delay line of the right-handed waveguide is composed of a capacitive iris for shunt capacitance and a shorter short stub for series inductance. Dispersion diagram is estimated by Bloch analysis in the design. Left-handed phenomenon with phase variation of mechanically-controlled phase shifter and shortening wavelength due to the delay line are confirmed in the experiments.","PeriodicalId":375707,"journal":{"name":"2010 International Conference on Electromagnetics in Advanced Applications","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127846463","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 : 2010-12-03DOI: 10.1109/ICEAA.2010.5649999
F. Wollenschlager, R. Stephan, L. Xia, J. Muller, M. Hein
The ISM band at 60 GHz provides sufficient bandwidth for wireless transmission of data rates in the Gbps range. To fully utilize this unlicensed frequency range, the design of suitable antennas has to account for application-specific demands in terms of frequency bandwidth and antenna gain. We present a successful implementation, based on a compact patch array approach, meeting realistic requirements. The measured S-parameters indicate an impedance bandwidth of 10.5% for the antenna array. The measured gain amounts to 11.8 dBi with a flatness of 2.1 dB over the impedance bandwidth.
{"title":"A broadband 60 GHz aperture-coupled patch array integrated in multilayer ceramics technology","authors":"F. Wollenschlager, R. Stephan, L. Xia, J. Muller, M. Hein","doi":"10.1109/ICEAA.2010.5649999","DOIUrl":"https://doi.org/10.1109/ICEAA.2010.5649999","url":null,"abstract":"The ISM band at 60 GHz provides sufficient bandwidth for wireless transmission of data rates in the Gbps range. To fully utilize this unlicensed frequency range, the design of suitable antennas has to account for application-specific demands in terms of frequency bandwidth and antenna gain. We present a successful implementation, based on a compact patch array approach, meeting realistic requirements. The measured S-parameters indicate an impedance bandwidth of 10.5% for the antenna array. The measured gain amounts to 11.8 dBi with a flatness of 2.1 dB over the impedance bandwidth.","PeriodicalId":375707,"journal":{"name":"2010 International Conference on Electromagnetics in Advanced Applications","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126844702","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 : 2010-12-03DOI: 10.1109/ICEAA.2010.5650605
R. Cowburn
A new magnetic quasi-particle called a chiral soliton is described in multilayered magnetic nanostructures. This quasi-particle exhibits many of the features exhibit by domain walls but is better suited to 3-dimensional device architectures.
{"title":"3-dimensional spintronics","authors":"R. Cowburn","doi":"10.1109/ICEAA.2010.5650605","DOIUrl":"https://doi.org/10.1109/ICEAA.2010.5650605","url":null,"abstract":"A new magnetic quasi-particle called a chiral soliton is described in multilayered magnetic nanostructures. This quasi-particle exhibits many of the features exhibit by domain walls but is better suited to 3-dimensional device architectures.","PeriodicalId":375707,"journal":{"name":"2010 International Conference on Electromagnetics in Advanced Applications","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126427801","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 : 2010-12-03DOI: 10.1109/ICEAA.2010.5652132
G. Valério, D. Wilton, D. Jackson, A. Galli
In this paper an original acceleration scheme for the computation of periodic multilayered mixed-potential Green's functions is used to perform numerical dispersive analyses in bidimensional periodic structures embedded in a dielectric slab. The acceleration scheme is first described with reference to the various components of the dyadic and scalar potentials. The Green's functions are then implemented in a method-of-moments code and dispersion curves for both leaky and bound modes (i.e., surface waves) in slabs with periodic inclusions are numerically computed and discussed.
{"title":"Investigation of bound and leaky modes on periodic bidimensional structures using mixed-potential integral equations","authors":"G. Valério, D. Wilton, D. Jackson, A. Galli","doi":"10.1109/ICEAA.2010.5652132","DOIUrl":"https://doi.org/10.1109/ICEAA.2010.5652132","url":null,"abstract":"In this paper an original acceleration scheme for the computation of periodic multilayered mixed-potential Green's functions is used to perform numerical dispersive analyses in bidimensional periodic structures embedded in a dielectric slab. The acceleration scheme is first described with reference to the various components of the dyadic and scalar potentials. The Green's functions are then implemented in a method-of-moments code and dispersion curves for both leaky and bound modes (i.e., surface waves) in slabs with periodic inclusions are numerically computed and discussed.","PeriodicalId":375707,"journal":{"name":"2010 International Conference on Electromagnetics in Advanced Applications","volume":"127 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126875703","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 : 2010-12-03DOI: 10.1109/ICEAA.2010.5650611
R. Cariou
If the RCS of a target is measured in measurement facility which is not a Faraday cage, this RCS might be corrupted by eventual outside transmissions which fill the same spectral band than measurement. In this situation, outside radiations are going to pollute the value of the measured RCS and as a consequence their level must be reduced in order to be able to get correct values of RCS. This article deals with a mathematical method which allows limiting the influence of interferences on the measured values of RCS thanks to the use of wavelets.
{"title":"Use of wavelets decomposition to reduce outside transmissions during measurement of RCS","authors":"R. Cariou","doi":"10.1109/ICEAA.2010.5650611","DOIUrl":"https://doi.org/10.1109/ICEAA.2010.5650611","url":null,"abstract":"If the RCS of a target is measured in measurement facility which is not a Faraday cage, this RCS might be corrupted by eventual outside transmissions which fill the same spectral band than measurement. In this situation, outside radiations are going to pollute the value of the measured RCS and as a consequence their level must be reduced in order to be able to get correct values of RCS. This article deals with a mathematical method which allows limiting the influence of interferences on the measured values of RCS thanks to the use of wavelets.","PeriodicalId":375707,"journal":{"name":"2010 International Conference on Electromagnetics in Advanced Applications","volume":"9 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113932695","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 : 2010-12-03DOI: 10.1109/ICEAA.2010.5653941
Ding-E Wen, T. Cui, Jing Yu, Qi Zhang
In this paper, near field radiation characteristics of HF antenna on platform and typical microwave reflector antenna are analyzed by MLFMA. In the full wave computation, interactions among current on patches are performed by MLFMA, which are the most time and memory consuming, the other operations are still computed by MoM. Numerical results prove the precision of the method.
{"title":"Full wave analysis to near field radiation characteristics of antennas by MLFMA","authors":"Ding-E Wen, T. Cui, Jing Yu, Qi Zhang","doi":"10.1109/ICEAA.2010.5653941","DOIUrl":"https://doi.org/10.1109/ICEAA.2010.5653941","url":null,"abstract":"In this paper, near field radiation characteristics of HF antenna on platform and typical microwave reflector antenna are analyzed by MLFMA. In the full wave computation, interactions among current on patches are performed by MLFMA, which are the most time and memory consuming, the other operations are still computed by MoM. Numerical results prove the precision of the method.","PeriodicalId":375707,"journal":{"name":"2010 International Conference on Electromagnetics in Advanced Applications","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131533504","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 : 2010-12-03DOI: 10.1109/ICEAA.2010.5653147
G. Safonova, E. Vinogradova
The Dirichlet problem for Laplace's equation in an area between two arbitrary profiled infinitely long cylinders is rigorously solved by the Method of Regularization. The obtained solution is applied to the accurate analysis of the shielded microstrip line with homogeneous dielectric filling and thick conductor — the structure supporting the transmission of an ideal TEM-wave. Capacitance and characteristic impedance are calculated for different shapes of transmission line profile with an accent on the near rectangular profile modelled by the super-quadric equation. Effect of the finite conductor thickness on characteristic impedance is comprehensively examined.
{"title":"Rigorous approach to analysis of arbitrary profiled shielded micro-strip line: TEM-mode","authors":"G. Safonova, E. Vinogradova","doi":"10.1109/ICEAA.2010.5653147","DOIUrl":"https://doi.org/10.1109/ICEAA.2010.5653147","url":null,"abstract":"The Dirichlet problem for Laplace's equation in an area between two arbitrary profiled infinitely long cylinders is rigorously solved by the Method of Regularization. The obtained solution is applied to the accurate analysis of the shielded microstrip line with homogeneous dielectric filling and thick conductor — the structure supporting the transmission of an ideal TEM-wave. Capacitance and characteristic impedance are calculated for different shapes of transmission line profile with an accent on the near rectangular profile modelled by the super-quadric equation. Effect of the finite conductor thickness on characteristic impedance is comprehensively examined.","PeriodicalId":375707,"journal":{"name":"2010 International Conference on Electromagnetics in Advanced Applications","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121268584","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 : 2010-12-03DOI: 10.1109/ICEAA.2010.5651769
L. Basilio, L. Warne, W. Langston, W. Johnson, M. Sinclair
This paper introduces an effective-media toolset that can be used for the design of metamaterial structures based on metallic components such as split-ring resonators and dipoles, as well as dielectric spherical resonators. For demonstration purposes the toolset will be used to generate infrared metamaterial designs, and the predicted performances will be verified with full-wave numerical simulations.
{"title":"An effective media toolset for use in metamaterial design","authors":"L. Basilio, L. Warne, W. Langston, W. Johnson, M. Sinclair","doi":"10.1109/ICEAA.2010.5651769","DOIUrl":"https://doi.org/10.1109/ICEAA.2010.5651769","url":null,"abstract":"This paper introduces an effective-media toolset that can be used for the design of metamaterial structures based on metallic components such as split-ring resonators and dipoles, as well as dielectric spherical resonators. For demonstration purposes the toolset will be used to generate infrared metamaterial designs, and the predicted performances will be verified with full-wave numerical simulations.","PeriodicalId":375707,"journal":{"name":"2010 International Conference on Electromagnetics in Advanced Applications","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128106244","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：