Pub Date : 2015-11-01DOI: 10.1109/CEEM.2015.7368657
Duan Yantao, Qiu Shi, Shi Lihua, Chen Bin
This paper presents the numerical dispersion analysis of the efficient two-dimensional Laguerre-based finite-difference time-domain (FDTD) method. The numerical dispersion relation is derived and the numerical dispersion errors are investigated. The results indicate that, by choosing the suitable values of the sampling point density in space domain and the time-scale factor, one can ensure the numerical dispersion error within certain accuracy.
{"title":"Numerical dispersion analysis for efficient 2-D Laguerre-based FDTD method","authors":"Duan Yantao, Qiu Shi, Shi Lihua, Chen Bin","doi":"10.1109/CEEM.2015.7368657","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368657","url":null,"abstract":"This paper presents the numerical dispersion analysis of the efficient two-dimensional Laguerre-based finite-difference time-domain (FDTD) method. The numerical dispersion relation is derived and the numerical dispersion errors are investigated. The results indicate that, by choosing the suitable values of the sampling point density in space domain and the time-scale factor, one can ensure the numerical dispersion error within certain accuracy.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125079553","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 : 2015-11-01DOI: 10.1109/CEEM.2015.7368634
Masayoshi Okita, Shinichiro Yamamoto, K. Hatakeyama, T. Tsutaoka
This paper proposes transmission control materials consisting of negative permittivity and high permittivity materials. As the high permittivity material, permalloy composite material and dipole array sheet were used, and as the negative permittivity material, wire grid was used here. The transmission characteristics of the proposed laminated structure are evaluated by conventional transmission line model and by measurements in free space.
{"title":"Transmission characteristics of laminated structures using negative permittivity and high permittivity materials","authors":"Masayoshi Okita, Shinichiro Yamamoto, K. Hatakeyama, T. Tsutaoka","doi":"10.1109/CEEM.2015.7368634","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368634","url":null,"abstract":"This paper proposes transmission control materials consisting of negative permittivity and high permittivity materials. As the high permittivity material, permalloy composite material and dipole array sheet were used, and as the negative permittivity material, wire grid was used here. The transmission characteristics of the proposed laminated structure are evaluated by conventional transmission line model and by measurements in free space.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125296656","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 : 2015-11-01DOI: 10.1109/CEEM.2015.7368674
M. Cao, Z. Xue, W. Ren, W. Li
A dielectric embedded monopole antenna is proposed for super wideband(SWB)applications. The antenna is designed become inverted cone in order to expand the bandwidth, and the SWB antenna possesses a method to minimize the size of antenna by dielectric embedded to lower the height. The antenna is simulated and measured after practically fabricated. Measured results show a good agreement with simulated results that a -10dB bandwidth of 43.5GHz (4.5-48GHz) is achieved with ratio bandwidth 10.7:1.The antenna prototype shows good impedance matching, stable far-field radiation patterns, and constant group delay over the super wideband.
{"title":"A dielectric embedded antenna for super wideband applications","authors":"M. Cao, Z. Xue, W. Ren, W. Li","doi":"10.1109/CEEM.2015.7368674","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368674","url":null,"abstract":"A dielectric embedded monopole antenna is proposed for super wideband(SWB)applications. The antenna is designed become inverted cone in order to expand the bandwidth, and the SWB antenna possesses a method to minimize the size of antenna by dielectric embedded to lower the height. The antenna is simulated and measured after practically fabricated. Measured results show a good agreement with simulated results that a -10dB bandwidth of 43.5GHz (4.5-48GHz) is achieved with ratio bandwidth 10.7:1.The antenna prototype shows good impedance matching, stable far-field radiation patterns, and constant group delay over the super wideband.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122021183","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 : 2015-11-01DOI: 10.1109/CEEM.2015.7368665
Ping Zhou, Yinghua Lv, Zhihong Chen, Yongsheng Song
As the emphasis on lightning protection for launch vehicle s, lightning indirect effects had taken into concern in nowadays. Among all the indirect effects action forms, the LEMP field radiation effect is one of the most common one. On the purpose of analyze the radiation effect on launch vehicles, a small launch vehicle model was established. Besides, a vertical LEMP field and a horizontal LEMP field were respectively set up near the model to correspond to the different radiation directions of the LEMP field. By using the TLM algorithm, a simulation analysis was carried out, and the simulation results were obtained. By comparing with the actual situation, it has validated that the simulation results were similar to the actual LEMP inductive field distribution trend.
{"title":"Simulation analysis on LEMP field radiation effect for a small launch vehicle","authors":"Ping Zhou, Yinghua Lv, Zhihong Chen, Yongsheng Song","doi":"10.1109/CEEM.2015.7368665","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368665","url":null,"abstract":"As the emphasis on lightning protection for launch vehicle s, lightning indirect effects had taken into concern in nowadays. Among all the indirect effects action forms, the LEMP field radiation effect is one of the most common one. On the purpose of analyze the radiation effect on launch vehicles, a small launch vehicle model was established. Besides, a vertical LEMP field and a horizontal LEMP field were respectively set up near the model to correspond to the different radiation directions of the LEMP field. By using the TLM algorithm, a simulation analysis was carried out, and the simulation results were obtained. By comparing with the actual situation, it has validated that the simulation results were similar to the actual LEMP inductive field distribution trend.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117010134","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 : 2015-11-01DOI: 10.1109/CEEM.2015.7368643
Shi Qiu, Y. Duan, Tao Wang, Yun Li
A wideband active E-dot sensor is designed and tested in calibration. Thereafter, calibration schemes for E-dot sensor including magnitudes and risetimes are proposed and conducted. Two magnitude calibration methods are performed. Experimental results exhibit that the magnitude calibration coefficients between the two methods are less than 3%, and the 10%-90% risetime of the sensor is less than 7ns, which is well suited for lightning observations. Subtle discrepancy exists between the reference signal and the measured one. These differences are in good agrreement with previous observations, which indicate that dE/dt usually reflect more higher frequency components, and the integration of dE/dt to derive E-field is valid only in the fast rising portion of dE/dt waveforms.
{"title":"Calibration schemes for lightning E-dot sensors","authors":"Shi Qiu, Y. Duan, Tao Wang, Yun Li","doi":"10.1109/CEEM.2015.7368643","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368643","url":null,"abstract":"A wideband active E-dot sensor is designed and tested in calibration. Thereafter, calibration schemes for E-dot sensor including magnitudes and risetimes are proposed and conducted. Two magnitude calibration methods are performed. Experimental results exhibit that the magnitude calibration coefficients between the two methods are less than 3%, and the 10%-90% risetime of the sensor is less than 7ns, which is well suited for lightning observations. Subtle discrepancy exists between the reference signal and the measured one. These differences are in good agrreement with previous observations, which indicate that dE/dt usually reflect more higher frequency components, and the integration of dE/dt to derive E-field is valid only in the fast rising portion of dE/dt waveforms.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128747842","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 : 2015-11-01DOI: 10.1109/CEEM.2015.7368676
Zhang Senlin, Liu Qing, WU Guoqiang
In this paper, the shielding performance of reinforced concrete construction is analyzed emplying the method of moment and equivalent principle. The surface of the reinforced concrete are modeled using rectangular surfaces patches. The surface of the reinforced concrete is assumed as metallized and modeled based on the equivalent principle. And the proposed technique has fewer unknown variables than MoM volume Integral equation solution, and is quicker in computation and more applicable to analyze the shielding performance of reinforced concrete building with complex structure. The comparison between the calculation results of this paper and FDTD, shows that the method is effective. And the shielding effectiveness of a real building in substation is analyzed at last.
{"title":"Analysis of shielding performance of reinforced concrete structures using the method of moment","authors":"Zhang Senlin, Liu Qing, WU Guoqiang","doi":"10.1109/CEEM.2015.7368676","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368676","url":null,"abstract":"In this paper, the shielding performance of reinforced concrete construction is analyzed emplying the method of moment and equivalent principle. The surface of the reinforced concrete are modeled using rectangular surfaces patches. The surface of the reinforced concrete is assumed as metallized and modeled based on the equivalent principle. And the proposed technique has fewer unknown variables than MoM volume Integral equation solution, and is quicker in computation and more applicable to analyze the shielding performance of reinforced concrete building with complex structure. The comparison between the calculation results of this paper and FDTD, shows that the method is effective. And the shielding effectiveness of a real building in substation is analyzed at last.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129629696","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 : 2015-11-01DOI: 10.1109/CEEM.2015.7368671
Jiang Wenwen, Shi Lihua, H. Zhengyu
Buried cables are widely used in power systems. It is an important research on electromagnetic pulse (EMP) coupling on buried cables. In this paper, based on Agrawal model of transmission line (TL) equations and the finite-difference time domain (FDTD) method, the coupling problem of buried cables is studied. By using Vector-Fitting method, we represent soil impedance and admittance by a rational function approximation to form a convolution calculation. The impact of the frequency-dependent electrical parameters of soil on EMP coupling on underground cables is analyzed.
{"title":"EMP coupling to buried cables in the frequency-dependent soil","authors":"Jiang Wenwen, Shi Lihua, H. Zhengyu","doi":"10.1109/CEEM.2015.7368671","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368671","url":null,"abstract":"Buried cables are widely used in power systems. It is an important research on electromagnetic pulse (EMP) coupling on buried cables. In this paper, based on Agrawal model of transmission line (TL) equations and the finite-difference time domain (FDTD) method, the coupling problem of buried cables is studied. By using Vector-Fitting method, we represent soil impedance and admittance by a rational function approximation to form a convolution calculation. The impact of the frequency-dependent electrical parameters of soil on EMP coupling on underground cables is analyzed.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115780172","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 : 2015-11-01DOI: 10.1109/CEEM.2015.7368613
Xu Xianguo, Zeng Chao, Zhou Kaiming, Huang Congshun, Yang Youli, Tan Zhengchao
This paper studies test and evaluation methods of electromagnetic pulse effects on several sensitive objects and analyzes characteristic parameters of damage effects. The optical fiber transmission measure and monitoring systems are established. The coupling and effects of the computer networks, wireless equipments and electric power lines are discussed in detail. The experimental results show that the damage of whole irradiation is greater than that of local irradiation of equipments and the electromagnetic pulse effects of fast rising edge on computer network are more obvious than that of low rising edge because the latter coupling is weaker. It is also known that electromagnetic pulse coupling is inefficient with very high frequency antennas because their main bands are different. However, the coupling is very efficient with high voltage electric power lines which may result in destruction of terminal equipments with lower voltage levels.
{"title":"Researches on the damage effects of electromagnetic pulse of different rising edges","authors":"Xu Xianguo, Zeng Chao, Zhou Kaiming, Huang Congshun, Yang Youli, Tan Zhengchao","doi":"10.1109/CEEM.2015.7368613","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368613","url":null,"abstract":"This paper studies test and evaluation methods of electromagnetic pulse effects on several sensitive objects and analyzes characteristic parameters of damage effects. The optical fiber transmission measure and monitoring systems are established. The coupling and effects of the computer networks, wireless equipments and electric power lines are discussed in detail. The experimental results show that the damage of whole irradiation is greater than that of local irradiation of equipments and the electromagnetic pulse effects of fast rising edge on computer network are more obvious than that of low rising edge because the latter coupling is weaker. It is also known that electromagnetic pulse coupling is inefficient with very high frequency antennas because their main bands are different. However, the coupling is very efficient with high voltage electric power lines which may result in destruction of terminal equipments with lower voltage levels.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124233801","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 : 2015-11-01DOI: 10.1109/CEEM.2015.7368625
Fan Li, Tiehua Jiang, Sanqing Zhang, Yong Tao
This paper has proposed and illustrated two fast methods of computing antenna factor (AF) of a compact wideband antenna (CWA), which is designed to measure the electromagnetic environment inside spacecraft cabin. The computational results show good agreement with the experimental ones.
{"title":"Fast methods of computing antenna factor","authors":"Fan Li, Tiehua Jiang, Sanqing Zhang, Yong Tao","doi":"10.1109/CEEM.2015.7368625","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368625","url":null,"abstract":"This paper has proposed and illustrated two fast methods of computing antenna factor (AF) of a compact wideband antenna (CWA), which is designed to measure the electromagnetic environment inside spacecraft cabin. The computational results show good agreement with the experimental ones.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129833936","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 : 2015-11-01DOI: 10.1109/CEEM.2015.7368656
Kosorl Thourn, T. Aoyagi, J. Takada
This paper deals with the two-dimensional scattering problem of electromagnetic wave from a lossy dielectric cylinder which its material is modeled by the multiple poles Debye model. This scattering problem is numerically treated using the two-dimensional finite-difference time-domain (2D-FDTD) method with pulse excitation source. The total field (including incident and scattered fields) from a circular cylinder examined by the 2D-FDTD simulation is extracted in term of the scattering angle. The validation of this computation is done by the CST microwave studio (MWS). As a result, good agreement is observed and the effectiveness of Debye modeling of absorbing material from previous work is also confirmed.
{"title":"Numerical simulation of 2D scattering by a lossy dielectric cylinder using Debye modelling of absorbing material and pulse excitation source","authors":"Kosorl Thourn, T. Aoyagi, J. Takada","doi":"10.1109/CEEM.2015.7368656","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368656","url":null,"abstract":"This paper deals with the two-dimensional scattering problem of electromagnetic wave from a lossy dielectric cylinder which its material is modeled by the multiple poles Debye model. This scattering problem is numerically treated using the two-dimensional finite-difference time-domain (2D-FDTD) method with pulse excitation source. The total field (including incident and scattered fields) from a circular cylinder examined by the 2D-FDTD simulation is extracted in term of the scattering angle. The validation of this computation is done by the CST microwave studio (MWS). As a result, good agreement is observed and the effectiveness of Debye modeling of absorbing material from previous work is also confirmed.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129786393","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：