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2009 20th International Zurich Symposium on Electromagnetic Compatibility最新文献

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Method of evaluating electromagnetic-interference characteristics of wireless LANs by narrowing frequency bandwidth of desired waves 通过收窄期望波的频带来评估无线局域网电磁干扰特性的方法
2009 20th International Zurich Symposium on Electromagnetic Compatibility Pub Date : 2009-02-13 DOI: 10.1109/EMCZUR.2009.4783492
H. Koyama, M. Tokuda, Noboru Fujita
{"title":"Method of evaluating electromagnetic-interference characteristics of wireless LANs by narrowing frequency bandwidth of desired waves","authors":"H. Koyama, M. Tokuda, Noboru Fujita","doi":"10.1109/EMCZUR.2009.4783492","DOIUrl":"https://doi.org/10.1109/EMCZUR.2009.4783492","url":null,"abstract":"We evaluated the electromagnetic-interference characteristics of WLANs by using an opened Parallel Wired (PW) cell that is placed in a radio anechoic chamber. We used a new narrowband WLAN system to do this evaluation, which we have been developing to reduce electromagnetic-interference problems and increase the number of channels so that many systems can use this simultaneously in the same location. As a result, we found that 10- and 5-MHz WLAN systems can improve the PER characteristics more than a conventional WLAN system with a channel spacing of 20 MHz when impressing an interference wave with a narrow bandwidth such as that specified by the IEC 61000-4-3 standards as well as that with a wide bandwidth such as that specified by the WLAN IEEE802.11b standards. In addition, when impressing the IEEE802.11b wave to the 10-MHz system, the PER characteristics to Chs. 1 and 2 were improved by about 20 dB on the desired-to-undesired (D/U) signal power ratio and those to Ch. 3 were improved by about 30 dB on D/U compared with impressing an interference wave to a 20-MHz system.","PeriodicalId":192851,"journal":{"name":"2009 20th International Zurich Symposium on Electromagnetic Compatibility","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115154325","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
Measurement of Spread-Spectrum Radio Signals by Means of Wideband Field Probes 用宽带场探头测量扩频无线电信号
2009 20th International Zurich Symposium on Electromagnetic Compatibility Pub Date : 2009-02-13 DOI: 10.1109/EMCZUR.2009.4783494
D. Trinchero, F. Longobardi, R. Stefanelli, B. Fiorelli, L. Anglesio, A. Benedetto, G. d’Amore, S. Trinchero, M. Borsero, G. Vizio
{"title":"Measurement of Spread-Spectrum Radio Signals by Means of Wideband Field Probes","authors":"D. Trinchero, F. Longobardi, R. Stefanelli, B. Fiorelli, L. Anglesio, A. Benedetto, G. d’Amore, S. Trinchero, M. Borsero, G. Vizio","doi":"10.1109/EMCZUR.2009.4783494","DOIUrl":"https://doi.org/10.1109/EMCZUR.2009.4783494","url":null,"abstract":"Field probes have been widely used, in the literature, for electromagnetic compatibility measurements and electromagnetic interference estimation. In the last two decades, these instruments have been exploited for open-space electric field exposure assessment, thanks to their ergonomics and capability to adapt to any scenario. This paper analyses the behaviour of field probes, in presence of digital spread-spectrum signals: OFDM (802.11a, 802.11g, 802.16x, DVB-x), W-CDMA (UMTS), DSSS (802.11b). The experiment was set-up in controlled environments, and the results were compared to referenced one, measured by means of bolometers or vector signal analysers. Some structural drawbacks were identified. Consequently, some conclusions about calibration needs were introduced.","PeriodicalId":192851,"journal":{"name":"2009 20th International Zurich Symposium on Electromagnetic Compatibility","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116979856","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: 2
Semi-Analytical Approach to Assess EM Constraints on Cylinder-like Systems 评估类柱系统电磁约束的半解析方法
2009 20th International Zurich Symposium on Electromagnetic Compatibility Pub Date : 2009-02-13 DOI: 10.1109/EMCZUR.2009.4783399
I. Junqua, J. Parmantier
{"title":"Semi-Analytical Approach to Assess EM Constraints on Cylinder-like Systems","authors":"I. Junqua, J. Parmantier","doi":"10.1109/EMCZUR.2009.4783399","DOIUrl":"https://doi.org/10.1109/EMCZUR.2009.4783399","url":null,"abstract":"In this paper, we propose a complementary approach to full wave 3D numerical methods in order to evaluate external EM constraints on systems which can be assimilated to an assembly of cylinders. Here, we model the system under test as transmission line networks. The parameters of these transmission lines are adjusted in order to take into account the effect of cylinder thickness. Several examples of application of this technique and comparison with full 3D numerical computations are given.","PeriodicalId":192851,"journal":{"name":"2009 20th International Zurich Symposium on Electromagnetic Compatibility","volume":"39 16","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120855572","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
Susceptibility of a Sigma-Delta Converter to EMI σ - δ变换器对电磁干扰的敏感性
2009 20th International Zurich Symposium on Electromagnetic Compatibility Pub Date : 2009-02-13 DOI: 10.1109/EMCZUR.2009.4783466
Domenico Musumeci, F. Fiori
{"title":"Susceptibility of a Sigma-Delta Converter to EMI","authors":"Domenico Musumeci, F. Fiori","doi":"10.1109/EMCZUR.2009.4783466","DOIUrl":"https://doi.org/10.1109/EMCZUR.2009.4783466","url":null,"abstract":"This paper discusses the susceptibility of Sigma-Delta Analog-to-Digital converters to disturbances, arising from environmental electromagnetic pollution or from the parasitic coupling with noisy building blocks integrated in the same system-on-chip (SoC) or system-in-package (SiP). The operation of a first-order switched-capacitor sigma-delta converter, which receives at its input nominal signals corrupted by radio-frequency interference is analyzed through time domain computer simulations and the root causes of failures are discussed in detail.","PeriodicalId":192851,"journal":{"name":"2009 20th International Zurich Symposium on Electromagnetic Compatibility","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123793504","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
Augmented models of High-Frequency Transformers for SMPS SMPS高频变压器的增强模型
2009 20th International Zurich Symposium on Electromagnetic Compatibility Pub Date : 2009-02-13 DOI: 10.1109/EMCZUR.2009.4783421
I. Maio, Patrizia Savi, I. Stievano, F. Canavero
{"title":"Augmented models of High-Frequency Transformers for SMPS","authors":"I. Maio, Patrizia Savi, I. Stievano, F. Canavero","doi":"10.1109/EMCZUR.2009.4783421","DOIUrl":"https://doi.org/10.1109/EMCZUR.2009.4783421","url":null,"abstract":"The modeling of high-frequency transformers via augmented equivalent circuits is addressed. The augmented models are composed of a low-frequency equivalent and a supplemental element modeled via real rational fitting. They offer both high accuracy levels and a physical meaning that helps the interpretation of simulation results. Parasitics effects between the windings and between the windings and the carrying board can be also included. The use of an augmented model for the simulation of a dc-dc converter is demonstrated.","PeriodicalId":192851,"journal":{"name":"2009 20th International Zurich Symposium on Electromagnetic Compatibility","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126952016","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
Improving the Performances of a Reverberation Chamber: a Real Case 提高混响室的性能:一个真实案例
2009 20th International Zurich Symposium on Electromagnetic Compatibility Pub Date : 2009-02-13 DOI: 10.1109/EMCZUR.2009.4783388
M. Pocai, I. Dotto, D. Festa, G. D'Abreu
{"title":"Improving the Performances of a Reverberation Chamber: a Real Case","authors":"M. Pocai, I. Dotto, D. Festa, G. D'Abreu","doi":"10.1109/EMCZUR.2009.4783388","DOIUrl":"https://doi.org/10.1109/EMCZUR.2009.4783388","url":null,"abstract":"In a previous measurement campaign [1] it was found that the reverberation chamber (RC) of CISAM EMC Department evidenced anomalous values of the Quality factor (Q) - too low to be \"right\" for a fully aluminum chamber - and moreover, after some use it became absolutely evident that it was too easy to improve - lowering it, of course - the value of the Lowest Usable Frequency (LUF) of this chamber. After some investigations on the chamber materials/components and on the assembly procedures, the authors developed the idea that this strange behavior had to be attributed to the tuners - being the original ones made with somehow absorbing material - and therefore they decided to replace them with new, all metal tuners. In this paper, the results of a calibration campaign on the reverberation chamber after tuner replacement are presented, as well as the results of an emission test on a standard reference source before and after the replacement. The calibration has been done in the frequency range 80 MHz ÷ 3 GHz, and the emission tests have been performed in the range 100 MHz to 1 GHz, which is exactly the frequency range of the reference radiator used to generate a standard spectrum. The comparison between the results obtained, under the same conditions, with the old and with the new tuners is presented, and the goodness of the assumptions demonstrated: with the new tuners the performances of the chamber have been considerably improved.","PeriodicalId":192851,"journal":{"name":"2009 20th International Zurich Symposium on Electromagnetic Compatibility","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129693892","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
Crosstalk Cancellation of DDR3 Memory Channel for over 1600 Mbps Data Rate 超过1600 Mbps数据速率的DDR3内存信道串扰消除
2009 20th International Zurich Symposium on Electromagnetic Compatibility Pub Date : 2009-02-13 DOI: 10.1109/EMCZUR.2009.4783459
Junwoo Lee, Sung-Jong Han, Hyo-Seog Ryu, Sang Yeop Kim, Jongho Kang, K. Park, J. Kih
{"title":"Crosstalk Cancellation of DDR3 Memory Channel for over 1600 Mbps Data Rate","authors":"Junwoo Lee, Sung-Jong Han, Hyo-Seog Ryu, Sang Yeop Kim, Jongho Kang, K. Park, J. Kih","doi":"10.1109/EMCZUR.2009.4783459","DOIUrl":"https://doi.org/10.1109/EMCZUR.2009.4783459","url":null,"abstract":"In this paper, we propose crosstalk cancellation methodology for high speed DDR3 memory channel whose data rate is 1600 Mbps or faster. In DDR3, DQ signal still adopts microstrip line in the motherboard in order to achieve low cost. The propagation velocity of even-mode is different from that of odd-mode in the microstrip line, which results in skew among DQs and between DQ and data strobe (DQS) as well. This crosstalk reduces timing margin a lot and it is not endurable at the high data rate. The proposed method successfully suppresses the crosstalk and it is cost effective compared with using stripline for DQ and DQS in the motherboard.","PeriodicalId":192851,"journal":{"name":"2009 20th International Zurich Symposium on Electromagnetic Compatibility","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123378308","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: 10
Modeling and Calculation of Electromagnetic Field in the Surroundings of a Large Power Transformer 大型电力变压器环境电磁场的建模与计算
2009 20th International Zurich Symposium on Electromagnetic Compatibility Pub Date : 2009-02-13 DOI: 10.1109/EMCZUR.2009.4783396
L. Štrac, F. Kelemen, D. Žarko
{"title":"Modeling and Calculation of Electromagnetic Field in the Surroundings of a Large Power Transformer","authors":"L. Štrac, F. Kelemen, D. Žarko","doi":"10.1109/EMCZUR.2009.4783396","DOIUrl":"https://doi.org/10.1109/EMCZUR.2009.4783396","url":null,"abstract":"The presented study compares measured and calculated electromagnetic field in the surroundings of a large power transformer with the aim to avoid the necessity of measuring the field on subsequent units and use a computer model instead. The influences of various objects located in the vicinity of the transformer during measurement are also analyzed and are taken into account in a computer model.","PeriodicalId":192851,"journal":{"name":"2009 20th International Zurich Symposium on Electromagnetic Compatibility","volume":"167 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113973004","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: 6
Electric-field Vector Measurement with Fiber-mounted Electro-optic Probe 光纤光电探头的电场矢量测量
2009 20th International Zurich Symposium on Electromagnetic Compatibility Pub Date : 2009-02-13 DOI: 10.1109/EMCZUR.2009.4783490
H. Togo, S. Mochizuki, N. Kukutsu, T. Nagatsuma
{"title":"Electric-field Vector Measurement with Fiber-mounted Electro-optic Probe","authors":"H. Togo, S. Mochizuki, N. Kukutsu, T. Nagatsuma","doi":"10.1109/EMCZUR.2009.4783490","DOIUrl":"https://doi.org/10.1109/EMCZUR.2009.4783490","url":null,"abstract":"We have developed an electric-field vector measurement system that operates by scanning with a sensitivity-stabilized fiber-mounted electro-optic (EO) probe. This system can map the electric-field distribution in an area ten times larger than that with a conventional EO probe. Since the properties (e.g. sensitivity and directivity) of a longitudinal and transverse-detection probe are the same, a combination of the electric fields measured with each probe provides the electric-field vector. The intensity and phase distribution of the electric fields measured on each orthogonal axis represent an asymmetric shape of a planer circuit with a Vivaldi antenna, which cannot be calculated by the simulation with an ideal model. The vector spatial field calculated from the measured electric field shows the electric-field dynamics above and around the planar circuit. Consequently, the visualization of the vector spatial field based on measurements obtained with the fiber-mounted EO probe provides intuitive analyses and diagnoses of circuit and antenna performance.","PeriodicalId":192851,"journal":{"name":"2009 20th International Zurich Symposium on Electromagnetic Compatibility","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130243068","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
Analytical & Numerical Calculations of S-Parameters in Multilayer DPS-DNG Junctions 多层DPS-DNG结中s参数的解析与数值计算
2009 20th International Zurich Symposium on Electromagnetic Compatibility Pub Date : 2009-02-13 DOI: 10.1109/EMCZUR.2009.4783403
S. Cimen, G. Çakir, L. Sevgi
{"title":"Analytical & Numerical Calculations of S-Parameters in Multilayer DPS-DNG Junctions","authors":"S. Cimen, G. Çakir, L. Sevgi","doi":"10.1109/EMCZUR.2009.4783403","DOIUrl":"https://doi.org/10.1109/EMCZUR.2009.4783403","url":null,"abstract":"Metamaterials (MTM) have recently attracted much attention in electromagnetic engineering. Initial studies have focused on understanding their electromagnetic properties and responses, but applications have also begun to appear in the literature. This paper presents visualization of electromagnetic waves interacting with multi-layer MTM slabs in two-dimension as well as analytical and numerical S-parameter extraction.","PeriodicalId":192851,"journal":{"name":"2009 20th International Zurich Symposium on Electromagnetic Compatibility","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125208001","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
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