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Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402)最新文献

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Development and application of LEMP-simulating device lemp模拟装置的研制与应用
Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402) Pub Date : 2000-05-03 DOI: 10.1109/CEEM.2000.853919
Chen Yazhou, Liu Shanghe, Wei Guanghui
{"title":"Development and application of LEMP-simulating device","authors":"Chen Yazhou, Liu Shanghe, Wei Guanghui","doi":"10.1109/CEEM.2000.853919","DOIUrl":"https://doi.org/10.1109/CEEM.2000.853919","url":null,"abstract":"In this paper, a device is presented which is used to simulate a remote lightning electromagnetic environment. The device is composed of a set of surge generators and a set of parallel plate transverse electromagnetic wave cells (PPTCs). The field in the PPTCs is uniform so as to test the immunity of EUT. Experiments have been performed to testify its efficiency and feasibility. The results show that the device can work well.","PeriodicalId":153945,"journal":{"name":"Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133388415","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}
引用次数: 1
Analysis of the field within bounded wave simulator with a large test object in the working volume 工作体积较大的有界波模拟器的场分析
Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402) Pub Date : 2000-05-03 DOI: 10.1109/CEEM.2000.853981
Gao Cheng, Chen Bin, Z. Bi-hua, Shi Lihua, Wang Tingyong
{"title":"Analysis of the field within bounded wave simulator with a large test object in the working volume","authors":"Gao Cheng, Chen Bin, Z. Bi-hua, Shi Lihua, Wang Tingyong","doi":"10.1109/CEEM.2000.853981","DOIUrl":"https://doi.org/10.1109/CEEM.2000.853981","url":null,"abstract":"A bounded wave simulator is an efficient broad bandwidth illuminator and has been widely used in simulating the EMP pulse propagating in free space with a plane wave model. A test object in the working volume will cause field distortion. In this paper, the FDTD method is used to calculate the field distributions when a test object is situated in the bounded wave simulator or in a radiated plane wave. The errors of the field distribution according to the different ratio of the test object dimensions to the height of the working space is calculated and compared with the field in free space, especially the tangential H field component on the conductor surface. The method to determine the maximum test size in an EMP simulator is corrected based on our discussion. The advantage of the new method is that the results are more reasonable than before.","PeriodicalId":153945,"journal":{"name":"Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115867115","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}
引用次数: 3
The consideration of some problems of lightning protection and earthing in telecom center 电信中心防雷接地若干问题的思考
Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402) Pub Date : 2000-05-03 DOI: 10.1109/CEEM.2000.853969
Lai Shi Neng
{"title":"The consideration of some problems of lightning protection and earthing in telecom center","authors":"Lai Shi Neng","doi":"10.1109/CEEM.2000.853969","DOIUrl":"https://doi.org/10.1109/CEEM.2000.853969","url":null,"abstract":"In order to reduce or avoid human and installation damage by lightning, a lot of lightning protection and earthing techniques have been invented. The IEC publication 61024-1 'Structure against direct lightning' and China state standard GB 50057 'Design specification of lightning protection in structure' are the main guidance for structure against direct lightning in China. Due to the amount of precision equipment installed in a telecom center, carrying out these lightning protection standards, which aimed to protect humans and some basic installations only against lightning, is not perfect enough. It couldn't provide sufficient protection to the telecommunication network equipment. So the new effective measurements to protect the telecommunication centers and equipment against lightning need to be researched quickly. Though some specifications aimed at protecting telecom centers against lightning have been established, a lot of problems still exist. This paper provides some methods to solve the problems of direct lightning and lightning EMP protection, and earthing.","PeriodicalId":153945,"journal":{"name":"Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402)","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125609113","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}
引用次数: 1
Full-waveform measuring system for lightning current caused by lightning strikes to tall structures 高层建筑物雷击产生的雷击电流全波形测量系统
Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402) Pub Date : 2000-05-03 DOI: 10.1109/CEEM.2000.853961
Gao Cheng, Shi Lihua, Chen Bin, Zhang Gong-cheng, Z. Bi-hua, Cheng Ziming
{"title":"Full-waveform measuring system for lightning current caused by lightning strikes to tall structures","authors":"Gao Cheng, Shi Lihua, Chen Bin, Zhang Gong-cheng, Z. Bi-hua, Cheng Ziming","doi":"10.1109/CEEM.2000.853961","DOIUrl":"https://doi.org/10.1109/CEEM.2000.853961","url":null,"abstract":"In order to protect electronic devices against the effects of lightning strikes to tall structures, detailed information about the lightning currents are necessary. For this purpose, a full-waveform measuring system was set up on the north towers of Jiangyin Highway Bridge. In this paper, the calibration to this system is introduced and the results of simulating lightning currents are given.","PeriodicalId":153945,"journal":{"name":"Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126644667","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}
引用次数: 4
Improvement on WKB solution of parallel polarized waves propagating in slowly varied dielectric 缓变介质中平行极化波WKB解的改进
Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402) Pub Date : 2000-05-03 DOI: 10.1109/CEEM.2000.853931
Yang Chunshan, Fu Wenbin, Hu Linhua, Peng Baoquan
{"title":"Improvement on WKB solution of parallel polarized waves propagating in slowly varied dielectric","authors":"Yang Chunshan, Fu Wenbin, Hu Linhua, Peng Baoquan","doi":"10.1109/CEEM.2000.853931","DOIUrl":"https://doi.org/10.1109/CEEM.2000.853931","url":null,"abstract":"An improved Wentzel, Kramers and Brillouin (WKB) solution of parallel polarized waves propagating in slowly varied dielectric is given by the WKB method and perturbation techniques. The authors' result has hardly been restricted by propagation direction and its accuracy is shown to be better.","PeriodicalId":153945,"journal":{"name":"Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122513844","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}
引用次数: 1
A response of series regulator to incident high frequency noise on AC-mains 串联稳压器对交流电源高频噪声的响应
Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402) Pub Date : 2000-05-03 DOI: 10.1109/CEEM.2000.853916
A. Mutoh, S. Nitta
{"title":"A response of series regulator to incident high frequency noise on AC-mains","authors":"A. Mutoh, S. Nitta","doi":"10.1109/CEEM.2000.853916","DOIUrl":"https://doi.org/10.1109/CEEM.2000.853916","url":null,"abstract":"It is important in order to guarantee the stable operation of a digital circuit to understand the response of a power supply to incident high frequency noise. In this paper, the response of a series regulator to incident high frequency noise on AC-mains is analytically and experimentally clarified. As a result, it is shown that high frequency response of a series regulator is influenced by the parasitic capacitance between base and collector terminals of the control transistor, the parasitic capacitance between negative-input and output terminals of operational amplifier, and the output impedance of operational amplifier.","PeriodicalId":153945,"journal":{"name":"Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123582304","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}
引用次数: 0
Scattering from apertures in an infinitive long conducting cylinder 不定式长导电圆柱体的孔径散射
Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402) Pub Date : 2000-05-03 DOI: 10.1109/CEEM.2000.853932
L. Yinghua, Yu Xueping, Dong Yuxiang, Shen Yantao
{"title":"Scattering from apertures in an infinitive long conducting cylinder","authors":"L. Yinghua, Yu Xueping, Dong Yuxiang, Shen Yantao","doi":"10.1109/CEEM.2000.853932","DOIUrl":"https://doi.org/10.1109/CEEM.2000.853932","url":null,"abstract":"The specific case of loaded slot in a conducting circular cylinder is studied. This aperture is loaded by a parallel plate waveguide. The excitation applied in the problem is an electromagnetic plane wave incident perpendicularly on the cylinder. In the theoretical analysis, the authors introduce a directly solution with the moment method. After theoretical and numerical procedure, a general matrix equation is obtained by using the moment method.","PeriodicalId":153945,"journal":{"name":"Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130471949","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}
引用次数: 0
Study on the elimination of surface wave by metal fences 金属栅栏消除表面波的研究
Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402) Pub Date : 2000-05-03 DOI: 10.1109/CEEM.2000.853926
R. Zhang, D. Fang, K. Wu, W.X. Sheng
{"title":"Study on the elimination of surface wave by metal fences","authors":"R. Zhang, D. Fang, K. Wu, W.X. Sheng","doi":"10.1109/CEEM.2000.853926","DOIUrl":"https://doi.org/10.1109/CEEM.2000.853926","url":null,"abstract":"The microstrip antenna is a low-profile planar structure and is inexpensive compared with other types of antennas due to the ease of manufacture. However, patch-antenna designs have some limitations such as restricted bandwidth, low gain, and a decrease in radiation efficiency due to surface wave modes. Surface wave modes in microstrip substrates may cause the undesired energy losses and the reduction of the radiation efficiency of the patch antenna. A scheme to eliminate such modes by using metal fences is proposed. This structure can be easily realized by a metalated hole in manufacturing. It is observed that the patch antenna with this structure shows reduced levels of surface wave modes, thus improving the gain and the radiation pattern.","PeriodicalId":153945,"journal":{"name":"Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129604410","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}
引用次数: 5
A method for analyzing and modeling electromagnetic radiation property due to common-mode current in clock strip on PCB 一种PCB时钟带共模电流电磁辐射特性分析与建模方法
Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402) Pub Date : 2000-05-03 DOI: 10.1109/CEEM.2000.853912
Teng Xu, Z. Linchang
{"title":"A method for analyzing and modeling electromagnetic radiation property due to common-mode current in clock strip on PCB","authors":"Teng Xu, Z. Linchang","doi":"10.1109/CEEM.2000.853912","DOIUrl":"https://doi.org/10.1109/CEEM.2000.853912","url":null,"abstract":"The radiation from common-mode current of a clock strip is higher than other arranged strips on a printed circuit board (PCB). The electromagnetic compatibility (EMC) of a PCB is affected seriously if the clock strip on the PCB is arranged unsuitably. Using electric dipole models, a method for analyzing and modeling the electromagnetic radiation of the common-mode current in a clock strip on PCB is presented in this paper. The theoretically recommended value to keep the shortest distance from a clock strip to other strips on PCB and the reference frequencies to think of the maximum radiation are given when a PCB is designed.","PeriodicalId":153945,"journal":{"name":"Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113944636","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}
引用次数: 1
Buildings in high-speed mobile communication systems 高速移动通信系统中的建筑物
Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402) Pub Date : 2000-05-03 DOI: 10.1109/CEEM.2000.853887
Y. Miyazaki, P. Selormey
{"title":"Buildings in high-speed mobile communication systems","authors":"Y. Miyazaki, P. Selormey","doi":"10.1109/CEEM.2000.853887","DOIUrl":"https://doi.org/10.1109/CEEM.2000.853887","url":null,"abstract":"Wide-band digital indoor and future mobile communication systems are being developed in the quasi-millimeter and millimeter wave frequency bands. In such high-speed systems, the degradation of transmission quality by multipath fading constitutes a limiting barrier. Multipath fading, which results from reflection, refraction and scattering of radio waves by buildings and other structures, gives rise to more than one path reaching the receiver and produces a distorted version of the transmitted signal. In mobile and indoor communication systems it cannot be eliminated, therefore the multipath channel must be well characterized in order to reduce its effect in the design of such systems. The objective of this research is to study the multipath fading and delay spread effects due to buildings in an urban propagation channel. In particular, the effects of the building materials, shapes and number of buildings on multipath fading are being studied.","PeriodicalId":153945,"journal":{"name":"Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132103734","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}
引用次数: 0
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