Pub Date : 1900-01-01DOI: 10.1109/CEEM.2003.238345
Zheng Jun, Su Donglin
A real-valued genetic algorithm is proposed as a means of extracting one-dimensional scattering centers. In terms of the extraction of scattering signatures from noise-corrupted data, the genetic algorithm has been compared to the state space approach, and the results show that this method has higher-noise immunity.
{"title":"Scattering signatures analysis using genetic algorithm","authors":"Zheng Jun, Su Donglin","doi":"10.1109/CEEM.2003.238345","DOIUrl":"https://doi.org/10.1109/CEEM.2003.238345","url":null,"abstract":"A real-valued genetic algorithm is proposed as a means of extracting one-dimensional scattering centers. In terms of the extraction of scattering signatures from noise-corrupted data, the genetic algorithm has been compared to the state space approach, and the results show that this method has higher-noise immunity.","PeriodicalId":129734,"journal":{"name":"Asia-Pacific Conference on Environmental Electromagnetics, 2003. CEEM 2003. Proceedings.","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133647394","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 : 1900-01-01DOI: 10.1109/CEEM.2003.237999
Lv Wenjun, Cheng Chonghu, Z. Hongbo
A compact loaded microstrip antenna operating at 2.4 GHz is presented in the paper. It is similar in configuration to a conventional patch antenna fed by a microstrip-line, but its dimension is much smaller than that of the latter due to the existence of a load. The antenna has been investigated numerically and experimentally. Simulated and measured, results show that the antenna has a bandwidth of over 10% centered at 2.4 GHz.
{"title":"A practical compact loaded microstrip antenna","authors":"Lv Wenjun, Cheng Chonghu, Z. Hongbo","doi":"10.1109/CEEM.2003.237999","DOIUrl":"https://doi.org/10.1109/CEEM.2003.237999","url":null,"abstract":"A compact loaded microstrip antenna operating at 2.4 GHz is presented in the paper. It is similar in configuration to a conventional patch antenna fed by a microstrip-line, but its dimension is much smaller than that of the latter due to the existence of a load. The antenna has been investigated numerically and experimentally. Simulated and measured, results show that the antenna has a bandwidth of over 10% centered at 2.4 GHz.","PeriodicalId":129734,"journal":{"name":"Asia-Pacific Conference on Environmental Electromagnetics, 2003. CEEM 2003. Proceedings.","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132410785","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 : 1900-01-01DOI: 10.1109/CEEM.2003.238001
Lu Guizhen, M. Zhiji
In this paper, a simple method to analyze the wire antenna on conductor is proposed. The analysis is based on the moment method (Rao et al. (1982)). The analysis has been performed hitherto by developing a junction model of the point where the antenna is attached to the conductor. The junction model method can model the problem very well. However it brings complexity in the computing. Here, we present a simple method, which can give a good analysis result.
本文提出了一种简单的分析导线上导线天线的方法。分析基于矩量法(Rao et al.(1982))。到目前为止，分析是通过建立天线与导体连接点的结模型来进行的。结合部模型法可以很好地模拟这一问题。然而，它给计算带来了复杂性。在这里，我们提出了一种简单的方法，可以得到很好的分析结果。
{"title":"A simple method to analyze the wire antenna on the conductor","authors":"Lu Guizhen, M. Zhiji","doi":"10.1109/CEEM.2003.238001","DOIUrl":"https://doi.org/10.1109/CEEM.2003.238001","url":null,"abstract":"In this paper, a simple method to analyze the wire antenna on conductor is proposed. The analysis is based on the moment method (Rao et al. (1982)). The analysis has been performed hitherto by developing a junction model of the point where the antenna is attached to the conductor. The junction model method can model the problem very well. However it brings complexity in the computing. Here, we present a simple method, which can give a good analysis result.","PeriodicalId":129734,"journal":{"name":"Asia-Pacific Conference on Environmental Electromagnetics, 2003. CEEM 2003. Proceedings.","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130538873","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 : 1900-01-01DOI: 10.1109/CEEM.2003.238647
Jianqing Wang, N. Mukaide, O. Fujiwara
It is well known that electromagnetic (EM) energy is absorbed inhomogeneously in the human body even for plane-wave exposure. This implies that local resonance for various individual organs may occur. In order to investigate this implication, we analyzed numerically the organ resonance characteristics in the frequency range from 30 MHz up to 3 GHz with an anatomically based high-precision human body model and a parallel finite-difference time-domain (FDTD) technique. As a result, we found that the whole-body resonance occurring around 65 MHz causes the local resonance for all the organs at the same frequency. Local resonance peculiar to each of organs was also found to occur around 900 GHz for the brain, eyes and heart, 600 MHz for the testicles, and so on.
{"title":"FDTD calculation of organ resonance characteristics in an anatomically based human model for plane-wave exposure","authors":"Jianqing Wang, N. Mukaide, O. Fujiwara","doi":"10.1109/CEEM.2003.238647","DOIUrl":"https://doi.org/10.1109/CEEM.2003.238647","url":null,"abstract":"It is well known that electromagnetic (EM) energy is absorbed inhomogeneously in the human body even for plane-wave exposure. This implies that local resonance for various individual organs may occur. In order to investigate this implication, we analyzed numerically the organ resonance characteristics in the frequency range from 30 MHz up to 3 GHz with an anatomically based high-precision human body model and a parallel finite-difference time-domain (FDTD) technique. As a result, we found that the whole-body resonance occurring around 65 MHz causes the local resonance for all the organs at the same frequency. Local resonance peculiar to each of organs was also found to occur around 900 GHz for the brain, eyes and heart, 600 MHz for the testicles, and so on.","PeriodicalId":129734,"journal":{"name":"Asia-Pacific Conference on Environmental Electromagnetics, 2003. CEEM 2003. Proceedings.","volume":"271 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123494072","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 : 1900-01-01DOI: 10.1109/CEEM.2003.238545
Nie Ming-xin, Lu Ling, Song Wenwu
In this paper, we endeavor to investigate the characteristics of computer electromagnetic leakage based on GTEM measurement. We take several steps to measure the spectrum of computer emission, and the characteristics of computer emission are obtained by analysis both in frequency domain and time domain.
{"title":"Investigation on characteristics of computer electromagnetic leakage based on GTEM measurement","authors":"Nie Ming-xin, Lu Ling, Song Wenwu","doi":"10.1109/CEEM.2003.238545","DOIUrl":"https://doi.org/10.1109/CEEM.2003.238545","url":null,"abstract":"In this paper, we endeavor to investigate the characteristics of computer electromagnetic leakage based on GTEM measurement. We take several steps to measure the spectrum of computer emission, and the characteristics of computer emission are obtained by analysis both in frequency domain and time domain.","PeriodicalId":129734,"journal":{"name":"Asia-Pacific Conference on Environmental Electromagnetics, 2003. CEEM 2003. Proceedings.","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125586241","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 : 1900-01-01DOI: 10.1109/CEEM.2003.238296
Li Tang, Z. Hongbo
The paper simulated and analyzed the statistical performance of the Nakagami fading channel in wireless communication with MATLAB, including the complex envelop of the received signal, the level crossing rates and average fade durations on the maximal-ratio combining diversity.
{"title":"Analysis and simulation of Nakagami fading channel with MATLAB","authors":"Li Tang, Z. Hongbo","doi":"10.1109/CEEM.2003.238296","DOIUrl":"https://doi.org/10.1109/CEEM.2003.238296","url":null,"abstract":"The paper simulated and analyzed the statistical performance of the Nakagami fading channel in wireless communication with MATLAB, including the complex envelop of the received signal, the level crossing rates and average fade durations on the maximal-ratio combining diversity.","PeriodicalId":129734,"journal":{"name":"Asia-Pacific Conference on Environmental Electromagnetics, 2003. CEEM 2003. Proceedings.","volume":"171 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124166973","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 : 1900-01-01DOI: 10.1109/CEEM.2003.238349
Liu Yi-ping, Zhou Bi-hua
In order to search for the optimal electric hermetical measurements for the door aperture, some techniques are presented using various shielding gasket materials. Corresponding experiments are implemented at the same time. Lots of results are obtained from those experiments, which provide an important reference for the relevant related designs.
{"title":"The study of the electric hermetical measurements for the door's aperture","authors":"Liu Yi-ping, Zhou Bi-hua","doi":"10.1109/CEEM.2003.238349","DOIUrl":"https://doi.org/10.1109/CEEM.2003.238349","url":null,"abstract":"In order to search for the optimal electric hermetical measurements for the door aperture, some techniques are presented using various shielding gasket materials. Corresponding experiments are implemented at the same time. Lots of results are obtained from those experiments, which provide an important reference for the relevant related designs.","PeriodicalId":129734,"journal":{"name":"Asia-Pacific Conference on Environmental Electromagnetics, 2003. CEEM 2003. Proceedings.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130347091","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 : 1900-01-01DOI: 10.1109/CEEM.2003.238489
Zhang Chen, Hu Jidong
By test and statistical analysis, this paper derives a conversion coefficient between our method of measurement of electrified railway radio disturbance (ERRD) and the method stipulated by the EN50-121 standard. Then the evaluation of the level of ERRD in the state was carried out with the limit stipulated by the EN standard. This provides the foundation for us to apply the EN standard in China in the future.
{"title":"Conversion between the method of measurement of electrified railway radio disturbance in our country and the method stipulated by EN standard","authors":"Zhang Chen, Hu Jidong","doi":"10.1109/CEEM.2003.238489","DOIUrl":"https://doi.org/10.1109/CEEM.2003.238489","url":null,"abstract":"By test and statistical analysis, this paper derives a conversion coefficient between our method of measurement of electrified railway radio disturbance (ERRD) and the method stipulated by the EN50-121 standard. Then the evaluation of the level of ERRD in the state was carried out with the limit stipulated by the EN standard. This provides the foundation for us to apply the EN standard in China in the future.","PeriodicalId":129734,"journal":{"name":"Asia-Pacific Conference on Environmental Electromagnetics, 2003. CEEM 2003. Proceedings.","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129071314","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 : 1900-01-01DOI: 10.1109/CEEM.2003.237965
Fang Jitao, Zhang Chen
The paper analyses the effect of a high viaduct and a train on TV signals from two side: shelter effect and reflection effect, based on the theory of electric wave propagation and gives the measured data as confirmation. By comparison and analysis, we can know how and to what extent the TV signal will be affected by all kinds of parameters.
{"title":"The shelter and reflection effect research of the viaduct of JingHu high speed railway to TV signal","authors":"Fang Jitao, Zhang Chen","doi":"10.1109/CEEM.2003.237965","DOIUrl":"https://doi.org/10.1109/CEEM.2003.237965","url":null,"abstract":"The paper analyses the effect of a high viaduct and a train on TV signals from two side: shelter effect and reflection effect, based on the theory of electric wave propagation and gives the measured data as confirmation. By comparison and analysis, we can know how and to what extent the TV signal will be affected by all kinds of parameters.","PeriodicalId":129734,"journal":{"name":"Asia-Pacific Conference on Environmental Electromagnetics, 2003. CEEM 2003. Proceedings.","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129536533","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 : 1900-01-01DOI: 10.1109/CEEM.2003.238185
Weidong Zhang, X. Cui, Shuang Wang, Xuesong Gu
In high voltage substations, secondary equipment placed in the switchyard and inside the control house can be highly sensitive to transient electromagnetic disturbances due to switching operations. In order to evaluate transient electromagnetic environments (EME) and provide guidance for better immunity design of secondary equipment, it is necessary to measure and analyze these transient electromagnetic disturbances. While three new 500 kV substations were powered on, many transient electromagnetic disturbances were measured and recorded. Based on the FFT, an analysis program was developed and used to analyze characteristics of the disturbances. The results are summarized. Comparisons with IEC61000-4 series standards are made and recommendations are given.
{"title":"Measurement and analysis of switching transients in 500 kV substations","authors":"Weidong Zhang, X. Cui, Shuang Wang, Xuesong Gu","doi":"10.1109/CEEM.2003.238185","DOIUrl":"https://doi.org/10.1109/CEEM.2003.238185","url":null,"abstract":"In high voltage substations, secondary equipment placed in the switchyard and inside the control house can be highly sensitive to transient electromagnetic disturbances due to switching operations. In order to evaluate transient electromagnetic environments (EME) and provide guidance for better immunity design of secondary equipment, it is necessary to measure and analyze these transient electromagnetic disturbances. While three new 500 kV substations were powered on, many transient electromagnetic disturbances were measured and recorded. Based on the FFT, an analysis program was developed and used to analyze characteristics of the disturbances. The results are summarized. Comparisons with IEC61000-4 series standards are made and recommendations are given.","PeriodicalId":129734,"journal":{"name":"Asia-Pacific Conference on Environmental Electromagnetics, 2003. CEEM 2003. Proceedings.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129770731","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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