Pub Date : 2015-11-01DOI: 10.1109/CEEM.2015.7368636
Cao Zhi, Lu Guizhen
The radiowave propagation is a very important research content in the research of engineering and theory. The Fourier stepping algorithm for the parabolic equation is an effective method, which can create a balance between the accuracy and the speed of the calculation. In the analysis and research of this paper, the calculation results considering the Fresnel diffraction have been compared with the calculation results of the parabolic equation. In the numerical calculation study, the influence of the parabolic equation maximum deviation angle, the Fourier transform data points and the discrete interval to the results of the obstacle diffraction has been discussed.
{"title":"Research of the application of the Fourier transform algorithm for parabolic equation in radio wave diffraction","authors":"Cao Zhi, Lu Guizhen","doi":"10.1109/CEEM.2015.7368636","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368636","url":null,"abstract":"The radiowave propagation is a very important research content in the research of engineering and theory. The Fourier stepping algorithm for the parabolic equation is an effective method, which can create a balance between the accuracy and the speed of the calculation. In the analysis and research of this paper, the calculation results considering the Fresnel diffraction have been compared with the calculation results of the parabolic equation. In the numerical calculation study, the influence of the parabolic equation maximum deviation angle, the Fourier transform data points and the discrete interval to the results of the obstacle diffraction has been discussed.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"9 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":"127697140","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.2015.7368644
Tiehua Jiang, Fan Li, Sanqing Zhang, Yong Tao
In this paper, the measurement method of electric field amplitude and frequency is proposed for inner small space. The analysis of the influence on the measurement results and applicable range for the near and far-field transition zone is discussed. Based on the method, the electric field distribution is measured in a small metal cone. The measurements show that the method can be used to measure the electric field amplitude and frequency for spacecraft inner small space.
{"title":"Research on measurement of electric field amplitude and frequency inside spacecraft cabin","authors":"Tiehua Jiang, Fan Li, Sanqing Zhang, Yong Tao","doi":"10.1109/CEEM.2015.7368644","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368644","url":null,"abstract":"In this paper, the measurement method of electric field amplitude and frequency is proposed for inner small space. The analysis of the influence on the measurement results and applicable range for the near and far-field transition zone is discussed. Based on the method, the electric field distribution is measured in a small metal cone. The measurements show that the method can be used to measure the electric field amplitude and frequency for spacecraft inner small space.","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":"129633968","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.2015.7368693
Jun Zhao, Jiangong Zhang, Zhenhuan Liu, Zheyuan Gan
The paper describes problems with EMC of monitoring instrument in 1000kV gas insulated switchgear (GIS), due to transient enclosure voltage (TEV) produced during disconnector switching. Measuring method of TEV has been studied, including the choice of a reference ground point, the discussing about unique of scalar potential difference, and the method to eliminate the impact of magnetic field. A measuring system was developed and the impact of the wire lead of voltage probe was discussed. The measurement was conducted at an UHV AC test base and the characteristics of TEV were obtained.
{"title":"Measurement of TEV of 1000kV UHV gas insulated switchgear","authors":"Jun Zhao, Jiangong Zhang, Zhenhuan Liu, Zheyuan Gan","doi":"10.1109/CEEM.2015.7368693","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368693","url":null,"abstract":"The paper describes problems with EMC of monitoring instrument in 1000kV gas insulated switchgear (GIS), due to transient enclosure voltage (TEV) produced during disconnector switching. Measuring method of TEV has been studied, including the choice of a reference ground point, the discussing about unique of scalar potential difference, and the method to eliminate the impact of magnetic field. A measuring system was developed and the impact of the wire lead of voltage probe was discussed. The measurement was conducted at an UHV AC test base and the characteristics of TEV were obtained.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"345 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":"122839586","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.2015.7368623
He Kai, Zhang Jingling, L. Yinghua
This paper presents a design of low radar cross section (RCS) coupling slot antenna. It is based on the principle of radiation source and phase cancellation. Low RCS screen composed of orthogonal array of complementary split double rings resonator etched circular patch artificial magnetic conductor(AMC) is exploited on the antenna for RCS reduction in dual bands. The simulation results show that 10 dB RCS reduction is achieved over the range of 5.43-5.68 GHz in-band, implying 4.5% relative bandwidth. Meanwhile, 10 dB RCS reduction is achieved over the range of 4.43-4.69 GHz in out-band.
{"title":"Design of dual band low-RCS coupling slot antenna based on AMC structure","authors":"He Kai, Zhang Jingling, L. Yinghua","doi":"10.1109/CEEM.2015.7368623","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368623","url":null,"abstract":"This paper presents a design of low radar cross section (RCS) coupling slot antenna. It is based on the principle of radiation source and phase cancellation. Low RCS screen composed of orthogonal array of complementary split double rings resonator etched circular patch artificial magnetic conductor(AMC) is exploited on the antenna for RCS reduction in dual bands. The simulation results show that 10 dB RCS reduction is achieved over the range of 5.43-5.68 GHz in-band, implying 4.5% relative bandwidth. Meanwhile, 10 dB RCS reduction is achieved over the range of 4.43-4.69 GHz in out-band.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"18 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":"131571410","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.2015.7368621
Xiaodong Sun, X. Lv, Ling Li, Mingxu Sui
In this paper, we do the numerical simulation analyses of the absorbing material's reflection loss for radar reflection loss and the variation of the electromagnetism parameter and loss tangent based on transmission line theory. Do the research for the relation of the reflection loss and electromagnetism parameter and loss tangent as well, and then pose a design method for composite-material of compound medium.
{"title":"Numerical simulation analyses of reflection loss based on transmission line theory","authors":"Xiaodong Sun, X. Lv, Ling Li, Mingxu Sui","doi":"10.1109/CEEM.2015.7368621","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368621","url":null,"abstract":"In this paper, we do the numerical simulation analyses of the absorbing material's reflection loss for radar reflection loss and the variation of the electromagnetism parameter and loss tangent based on transmission line theory. Do the research for the relation of the reflection loss and electromagnetism parameter and loss tangent as well, and then pose a design method for composite-material of compound medium.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"2009 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":"127329628","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.2015.7368632
Zhinming Zhong, Yang Liu, D. Zeng, J. Tan
There's more and more requirement for fast rise time pulse generator especially with high repetition frequency and high voltage. A cost effective and portable high-repetition high voltage nanosecond rectangular pulse generator is developed in this paper using serial avalanche transistors. By carefully designing the serial transistor circuit and PCB, the stray inductance and voltage reflection are reduced effectively, which make the output rectangular pulse obtain 2.5 ns rise time. The amplitude output pulse can reach up to 2.5 kV with 12.5 ns width. The pulse time jitter is less than 100 ps even in10 kHz high repetition frequency output mode.
{"title":"Research on high-repetition high-voltage nanosecond rectangular pulse generator based on avalanche transistor","authors":"Zhinming Zhong, Yang Liu, D. Zeng, J. Tan","doi":"10.1109/CEEM.2015.7368632","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368632","url":null,"abstract":"There's more and more requirement for fast rise time pulse generator especially with high repetition frequency and high voltage. A cost effective and portable high-repetition high voltage nanosecond rectangular pulse generator is developed in this paper using serial avalanche transistors. By carefully designing the serial transistor circuit and PCB, the stray inductance and voltage reflection are reduced effectively, which make the output rectangular pulse obtain 2.5 ns rise time. The amplitude output pulse can reach up to 2.5 kV with 12.5 ns width. The pulse time jitter is less than 100 ps even in10 kHz high repetition frequency output mode.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"61 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":"128105969","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.2015.7368689
X. Kong, Yan-zhao Xie
The measurement uncertainty of the electro-optical E-field measurement system is analyzed and calculated in this paper. Firstly, by analyzing the measurement and calibration process, the mathematical model of the measurement system is proposed. Then the influence factors of the measuring result is listed and their individual uncertainties are calculated under some approximations and assumptions. Finally, the estimate of the relative expanded measurement uncertainty is 20%, under the confident level of 95%.
{"title":"Measurement uncertainty analysis of the electro-optical E-field measurement system","authors":"X. Kong, Yan-zhao Xie","doi":"10.1109/CEEM.2015.7368689","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368689","url":null,"abstract":"The measurement uncertainty of the electro-optical E-field measurement system is analyzed and calculated in this paper. Firstly, by analyzing the measurement and calibration process, the mathematical model of the measurement system is proposed. Then the influence factors of the measuring result is listed and their individual uncertainties are calculated under some approximations and assumptions. Finally, the estimate of the relative expanded measurement uncertainty is 20%, under the confident level of 95%.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"38 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":"114275126","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.2015.7368647
Guizhen Lu, Juanjuan Gao
The research of broadband absorbing materials is of great importance in engineering application. In this paper, a broadband structural absorbing material with multilayer is studied. Different proportions of graphite and iron powders added into the cement materials, which forms the absorbing material with a multilayer sandwich structure. Firstly, in order to measure this multilayer structural absorbing material, we developed the original method of measuring electromagnetic parameters,which is independent of the reference plane. A novel nonlinear equation for parameter extraction is presented. Compared with the original equation, the convergence rate of the iterative solution is improved. Secondly, a formula for choosing the initial confidence region of the nonlinear equation is given. At last, the equivalent electromagnetic parameters of the multilayer structure absorbing material were measured and analyzed, and the efficient permittivity and permeability were obtained.
{"title":"Design and measurement of structural absorbing material with multilayer","authors":"Guizhen Lu, Juanjuan Gao","doi":"10.1109/CEEM.2015.7368647","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368647","url":null,"abstract":"The research of broadband absorbing materials is of great importance in engineering application. In this paper, a broadband structural absorbing material with multilayer is studied. Different proportions of graphite and iron powders added into the cement materials, which forms the absorbing material with a multilayer sandwich structure. Firstly, in order to measure this multilayer structural absorbing material, we developed the original method of measuring electromagnetic parameters,which is independent of the reference plane. A novel nonlinear equation for parameter extraction is presented. Compared with the original equation, the convergence rate of the iterative solution is improved. Secondly, a formula for choosing the initial confidence region of the nonlinear equation is given. At last, the equivalent electromagnetic parameters of the multilayer structure absorbing material were measured and analyzed, and the efficient permittivity and permeability were obtained.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"29 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":"124079265","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.2015.7368639
Shao Kang, Liu Jiangling, Tang Xiaobin
In order to improve electromagnetic environmental adaptability of electronic information system, computer simulation and hardware in the loop analog would be needed to build the actual complex electromagnetic environment for it. The interference signal built by the test platform should be taken to design electromagnetic environmental adaptability test. In this paper, the hardware in the loop test platform of complex electromagnetic environment would be designed to provide the sustentation of furthering the development of electronic information system's experiment, training and evaluation under complex electromagnetic environment.
{"title":"Design of semi-physics test platform for complex electromagnetic environment","authors":"Shao Kang, Liu Jiangling, Tang Xiaobin","doi":"10.1109/CEEM.2015.7368639","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368639","url":null,"abstract":"In order to improve electromagnetic environmental adaptability of electronic information system, computer simulation and hardware in the loop analog would be needed to build the actual complex electromagnetic environment for it. The interference signal built by the test platform should be taken to design electromagnetic environmental adaptability test. In this paper, the hardware in the loop test platform of complex electromagnetic environment would be designed to provide the sustentation of furthering the development of electronic information system's experiment, training and evaluation under complex electromagnetic environment.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"21 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":"124350093","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.2015.7368641
Junhong Wang, Zhan Zhang
In some applications, such as the emissivity calculation of finite object, incident power, scattering power and absorbing power must be known. However, when calculating these powers from the corresponding fields defined conventionally, we may get incorrect result of the emissivity. The reason is that the powers calculated from the conventional defined incident and scattering fields are not coincide to physical regularity, although the field definition itself is theoretically correct. The property of existing everywhere and with uniform amplitude of the conventionally defined incident field leads to a very strong forward scattering field of finite object. This actually is not reasonable considering from the physical angle. In order to solve this problem, a new definition system for incident and scattering fields regarding the finite-size object scattering is proposed. By the new definitions, both the fields and powers have clear physical meaning, and the problem existing in the conventional definition system can be solved.
{"title":"Discussion on the field and power definition in finite-size object scattering problem","authors":"Junhong Wang, Zhan Zhang","doi":"10.1109/CEEM.2015.7368641","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368641","url":null,"abstract":"In some applications, such as the emissivity calculation of finite object, incident power, scattering power and absorbing power must be known. However, when calculating these powers from the corresponding fields defined conventionally, we may get incorrect result of the emissivity. The reason is that the powers calculated from the conventional defined incident and scattering fields are not coincide to physical regularity, although the field definition itself is theoretically correct. The property of existing everywhere and with uniform amplitude of the conventionally defined incident field leads to a very strong forward scattering field of finite object. This actually is not reasonable considering from the physical angle. In order to solve this problem, a new definition system for incident and scattering fields regarding the finite-size object scattering is proposed. By the new definitions, both the fields and powers have clear physical meaning, and the problem existing in the conventional definition system can be solved.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"9 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":"117119782","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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