Pub Date : 2010-11-15DOI: 10.1109/URSI-EMTS.2010.5637161
J. Qi, H. Kettunen, H. Wallén, A. Sihvola
In this presentation, four different S-parameter-based retrieval methods for the constitutive parameters are proposed and utilized to investigate the broadband effective permittivity of several geometrically simple composites. The accuracy and validity of these approaches are then explored by comparisons between the retrieved results, and a comparison of these results with the quasi-static Lord Rayleigh prediction.
{"title":"Different retrieval methods based on S-parameters for the permittivity of composites","authors":"J. Qi, H. Kettunen, H. Wallén, A. Sihvola","doi":"10.1109/URSI-EMTS.2010.5637161","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5637161","url":null,"abstract":"In this presentation, four different S-parameter-based retrieval methods for the constitutive parameters are proposed and utilized to investigate the broadband effective permittivity of several geometrically simple composites. The accuracy and validity of these approaches are then explored by comparisons between the retrieved results, and a comparison of these results with the quasi-static Lord Rayleigh prediction.","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"232 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115565367","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 : 2010-11-15DOI: 10.1109/URSI-EMTS.2010.5637334
P. Paschalidis, Kim Mahler, A. Kortke, M. Peter, M. Wisotzki, W. Keusgen
In this paper we offer a statistical evaluation for car-to-car measurements with a wideband 2 × 2 Multiple Input Multiple Output (MIMO) channel sounder with a calibrated bandwidth of 1 GHz. The results are further employed as a basis for a physically motivated channel model. The main concept of the presented approach is the modeling of the resolved multipath components both in the delay as well as in the Doppler domain, by means of statistically parametrized functions approximating the measured results.
{"title":"Statistical evaluation and modeling of the wideband Car-to-Car channel at 5.7 GHz","authors":"P. Paschalidis, Kim Mahler, A. Kortke, M. Peter, M. Wisotzki, W. Keusgen","doi":"10.1109/URSI-EMTS.2010.5637334","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5637334","url":null,"abstract":"In this paper we offer a statistical evaluation for car-to-car measurements with a wideband 2 × 2 Multiple Input Multiple Output (MIMO) channel sounder with a calibrated bandwidth of 1 GHz. The results are further employed as a basis for a physically motivated channel model. The main concept of the presented approach is the modeling of the resolved multipath components both in the delay as well as in the Doppler domain, by means of statistically parametrized functions approximating the measured results.","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115314973","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 : 2010-11-15DOI: 10.1109/URSI-EMTS.2010.5637198
A. Osipov
Electromagnetic scattering from an electrically small circular PEC disc is considered. The exact solution of the scattering problem given by Meixner and Andrejewski is used to derive the low frequency (Rayleigh) approximation for the scattered field. The results are compared with those obtained by expanding the fields on the disc in powers of k. Characteristic features of the low frequency scattering from the disc are studied, and closed-form approximations for various scattering cross sections are presented.
{"title":"Low frequency electromagnetic scattering from metallic discs","authors":"A. Osipov","doi":"10.1109/URSI-EMTS.2010.5637198","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5637198","url":null,"abstract":"Electromagnetic scattering from an electrically small circular PEC disc is considered. The exact solution of the scattering problem given by Meixner and Andrejewski is used to derive the low frequency (Rayleigh) approximation for the scattered field. The results are compared with those obtained by expanding the fields on the disc in powers of k. Characteristic features of the low frequency scattering from the disc are studied, and closed-form approximations for various scattering cross sections are presented.","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115715019","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 : 2010-11-15DOI: 10.1109/URSI-EMTS.2010.5636987
D. Johns
TLM is a well established full wave time-domain method for solving electromagnetic fields. TLM has been successfully applied to a diverse range of problems, including microwave component and antenna design, and it is particularly well-suited to EMI analysis. This paper reviews the developments of TLM for EMC/EMI analysis and presents a simulated aircraft lightning application.
{"title":"Development of the TLM method for EMC/EMI analysis","authors":"D. Johns","doi":"10.1109/URSI-EMTS.2010.5636987","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5636987","url":null,"abstract":"TLM is a well established full wave time-domain method for solving electromagnetic fields. TLM has been successfully applied to a diverse range of problems, including microwave component and antenna design, and it is particularly well-suited to EMI analysis. This paper reviews the developments of TLM for EMC/EMI analysis and presents a simulated aircraft lightning application.","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114246231","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 : 2010-11-15DOI: 10.1109/URSI-EMTS.2010.5637343
T. Preisner, W. Mathis
A magnetomechanical configuration consisting of two magnetized spheres is considered. Several conventional used force calculation methods are compared to each other with respect to the force distribution. Furthermore, the impact on the mechanical behavior due to strongly differing force distributions is numerically investigated.
{"title":"A comparison of different magnetic force distributions with respect to mechanical deformations using a hybrid calculation method","authors":"T. Preisner, W. Mathis","doi":"10.1109/URSI-EMTS.2010.5637343","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5637343","url":null,"abstract":"A magnetomechanical configuration consisting of two magnetized spheres is considered. Several conventional used force calculation methods are compared to each other with respect to the force distribution. Furthermore, the impact on the mechanical behavior due to strongly differing force distributions is numerically investigated.","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114898277","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 : 2010-11-15DOI: 10.1109/URSI-EMTS.2010.5637189
A. Heldring, J. Tamayo, J. Rius
The Method of Moments for electromagnetic scattering and radiation problems is often used in conjunction with the EFIE because the EFIE allows the analysis of open surfaces. For electrically large closed surfaces, the CFIE is often much more efficient because it yields a well conditioned impedance matrix. This is particularly important when an iterative solution method is used. This paper compares the EFIE and the CFIE for a novel fast direct (non-iterative) solution method, the Multiscale Compressed Block Decomposition method.
{"title":"Fast direct solution of the combined field integral equation","authors":"A. Heldring, J. Tamayo, J. Rius","doi":"10.1109/URSI-EMTS.2010.5637189","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5637189","url":null,"abstract":"The Method of Moments for electromagnetic scattering and radiation problems is often used in conjunction with the EFIE because the EFIE allows the analysis of open surfaces. For electrically large closed surfaces, the CFIE is often much more efficient because it yields a well conditioned impedance matrix. This is particularly important when an iterative solution method is used. This paper compares the EFIE and the CFIE for a novel fast direct (non-iterative) solution method, the Multiscale Compressed Block Decomposition method.","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127544545","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 : 2010-11-15DOI: 10.1109/URSI-EMTS.2010.5637259
I. Lindell
This paper reviews a topic of collaboration between the present author and professor F. Olyslager1 of the 1990's concerning the generalization of classes of electromagnetic media in which fields can be naturally decomposed in two noninteracting components. As a continuation to this research it is shown that the medium classes, originally defined in terms of three-dimensional Gibbsian dyadic algebra, can be introduced in a compact manner by applying four-dimensional multivector dyadic formalism. It is also shown that these classes are closed in the affine transformation.
{"title":"On the classification of electromagnetic media","authors":"I. Lindell","doi":"10.1109/URSI-EMTS.2010.5637259","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5637259","url":null,"abstract":"This paper reviews a topic of collaboration between the present author and professor F. Olyslager1 of the 1990's concerning the generalization of classes of electromagnetic media in which fields can be naturally decomposed in two noninteracting components. As a continuation to this research it is shown that the medium classes, originally defined in terms of three-dimensional Gibbsian dyadic algebra, can be introduced in a compact manner by applying four-dimensional multivector dyadic formalism. It is also shown that these classes are closed in the affine transformation.","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125927770","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 : 2010-11-15DOI: 10.1109/URSI-EMTS.2010.5637017
K. Sirenko
Slot resonances on TEM -waves in narrow radial and circular coaxial waveguides have been studied. These resonances allow us to change significantly and to control efficiently the electrodynamic characteristics of axially-symmetrical radiators of pulsed and monochromatic TM0n - waves.
{"title":"Slot resonances in axially-symmetrical radiators of pulsed and monochromatic TM0n - waves","authors":"K. Sirenko","doi":"10.1109/URSI-EMTS.2010.5637017","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5637017","url":null,"abstract":"Slot resonances on TEM -waves in narrow radial and circular coaxial waveguides have been studied. These resonances allow us to change significantly and to control efficiently the electrodynamic characteristics of axially-symmetrical radiators of pulsed and monochromatic TM0n - waves.","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126131378","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 : 2010-11-15DOI: 10.1109/URSI-EMTS.2010.5637087
N. Yilmazer, T. Sarkar, M. Salazar-Palma
In this presentation, we compare the performance of the Matrix Pencil (MP) and ESPRIT (Estimation of Signal Parameters using Rotational In-variance Technique) methods for direction of arrival estimation using single and multiple snapshots. The Matrix Pencil method is a technique that directly deals with the data to estimate the poles corresponding to the directions of arrival, and works well under a correlated signal case. This is in contrast to ESPRIT, a statistical subspace based estimation technique, which will work for the correlated case after applying some additional spatial smoothing techniques to the covariance matrix of the data. Simulation results are provided to compare the performance between these two methods. The results clearly demonstrates that when a small number of snapshots, including a single one, is available to process the data, the MP method always performs better than the ESPRIT method.
{"title":"DOA Estimation using Matrix Pencil and ESPRIT methods using single and multiple snapshots","authors":"N. Yilmazer, T. Sarkar, M. Salazar-Palma","doi":"10.1109/URSI-EMTS.2010.5637087","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5637087","url":null,"abstract":"In this presentation, we compare the performance of the Matrix Pencil (MP) and ESPRIT (Estimation of Signal Parameters using Rotational In-variance Technique) methods for direction of arrival estimation using single and multiple snapshots. The Matrix Pencil method is a technique that directly deals with the data to estimate the poles corresponding to the directions of arrival, and works well under a correlated signal case. This is in contrast to ESPRIT, a statistical subspace based estimation technique, which will work for the correlated case after applying some additional spatial smoothing techniques to the covariance matrix of the data. Simulation results are provided to compare the performance between these two methods. The results clearly demonstrates that when a small number of snapshots, including a single one, is available to process the data, the MP method always performs better than the ESPRIT method.","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126041522","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 : 2010-11-15DOI: 10.1109/URSI-EMTS.2010.5637356
S. Pyo, Min-Jae Lee, Young-Sik Kim
In this paper, a novel design of the metamaterial-based microstrip antenna with the ground slots is proposed for gain-enhanced dual-band operation. To realize the dual-band operation of the left-handed and the zeroth-order resonant mode, six equilateral triangular patches which are consists of the coupling gap and the through-hole via are isotropically arranged and the feeding structure is wired to one patch. The equilateral triangular ground slots are embedded for the gain improvements of the proposed antenna at each resonant mode. By only increasing the slot size ranged from 0 mm to 11 mm without changing the radiator elements, the antenna gains have been excellently increased at each operating mode. The measured gains of the proposed antenna are improved by up to 11.69 dB in the left-handed and 11.18 dB in zeroth-order resonant modes at the slot size of 11 mm, respectively in good agreements with the simulated results.
{"title":"Metamaterial-based microstrip antenna with ground slots for gain-enhanced dual-band operations","authors":"S. Pyo, Min-Jae Lee, Young-Sik Kim","doi":"10.1109/URSI-EMTS.2010.5637356","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5637356","url":null,"abstract":"In this paper, a novel design of the metamaterial-based microstrip antenna with the ground slots is proposed for gain-enhanced dual-band operation. To realize the dual-band operation of the left-handed and the zeroth-order resonant mode, six equilateral triangular patches which are consists of the coupling gap and the through-hole via are isotropically arranged and the feeding structure is wired to one patch. The equilateral triangular ground slots are embedded for the gain improvements of the proposed antenna at each resonant mode. By only increasing the slot size ranged from 0 mm to 11 mm without changing the radiator elements, the antenna gains have been excellently increased at each operating mode. The measured gains of the proposed antenna are improved by up to 11.69 dB in the left-handed and 11.18 dB in zeroth-order resonant modes at the slot size of 11 mm, respectively in good agreements with the simulated results.","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123601400","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：