2011 IEEE International Symposium on Electromagnetic Compatibility最新文献_第3页

Mold-based compartment shielding to mitigate the intra-system coupled noise on SiP modules 基于模具的隔层屏蔽以减轻SiP模块的系统内耦合噪声

2011 IEEE International Symposium on Electromagnetic Compatibility Pub Date : 2011-10-10 DOI: 10.1109/ISEMC.2011.6038333

Chih-Ying Hsiao, Chun-Hsiang Huang, Chuen-De Wang, Kuo-Hsien Liao, Chia-Hsien Shen, Chen-Chao Wang, Tzong-Lin Wu

{"title":"Mold-based compartment shielding to mitigate the intra-system coupled noise on SiP modules","authors":"Chih-Ying Hsiao, Chun-Hsiang Huang, Chuen-De Wang, Kuo-Hsien Liao, Chia-Hsien Shen, Chen-Chao Wang, Tzong-Lin Wu","doi":"10.1109/ISEMC.2011.6038333","DOIUrl":"https://doi.org/10.1109/ISEMC.2011.6038333","url":null,"abstract":"A new technology based on conformal shielding technique called compartment shielding is proposed to isolate the coupled noise between the digital and RF/analog circuits inside system-in-package (SiP) modules. The technology is realized by using a tooth-shaped metal frame to separate different functional circuits. It provides an excellent shielding effectiveness (SE) and reduces the cost, dimensions, and weight compared to the conventional solution. Based on our experience, a test vehicle is designed with a broadband near-field source to evaluate the SE from 0.1 GHz to 10 GHz. The vector network analyzer (VNA) set up with an extremely low noise floor is utilized to measure the insertion loss of the test vehicle. From the measured results, the SE reaches approximately 30 dB before the first resonance appears. The discrepancy between the simulation and measurement are dominated by the fabrication errors and the power leakage at the transitions; however, the isolation over 100 dB with the proposed shield is good enough for many commercial applications, such as hand-held devices and wireless connectivity modules.","PeriodicalId":440959,"journal":{"name":"2011 IEEE International Symposium on Electromagnetic Compatibility","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132967483","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: 15

A method for measuring partial inductance 一种测量局部电感的方法

2011 IEEE International Symposium on Electromagnetic Compatibility Pub Date : 2011-10-10 DOI: 10.1109/ISEMC.2011.6038332

H. Song, Y. Yoon, M. Steffka, J. Campbell, R. Young

引用次数: 2

Efficient experimental procedure for antenna calibration in plastic/concrete/metallic conduits 有效的实验程序天线校准在塑料/混凝土/金属导管

2011 IEEE International Symposium on Electromagnetic Compatibility Pub Date : 2011-10-10 DOI: 10.1109/ISEMC.2011.6038291

R. Stefanelli, D. Trinchero

引用次数: 1

Crew Quarters (CQ) and Electromagnetic Interference (EMI) Measurement Facility combined impedance study 机组人员宿舍(CQ)和电磁干扰(EMI)测量设施结合阻抗研究

2011 IEEE International Symposium on Electromagnetic Compatibility Pub Date : 2011-10-10 DOI: 10.1109/ISEMC.2011.6038420

Robert C. Scully

引用次数: 0

Optimizing decoupling capacitor placement to reduce effective inductance 优化去耦电容布置，降低有效电感

2011 IEEE International Symposium on Electromagnetic Compatibility Pub Date : 2011-10-10 DOI: 10.1109/ISEMC.2011.6038306

B. Archambeault, Jingook Kim, S. Connor, J. Fan

引用次数: 8

Controlling low frequency interference from direct energy transfer spacecraft power systems 控制直接能量传递航天器动力系统的低频干扰

2011 IEEE International Symposium on Electromagnetic Compatibility Pub Date : 2011-10-10 DOI: 10.1109/ISEMC.2011.6038425

K. Blackburn, B. Lessard, D. Kirchner, W. Kurth

{"title":"Controlling low frequency interference from direct energy transfer spacecraft power systems","authors":"K. Blackburn, B. Lessard, D. Kirchner, W. Kurth","doi":"10.1109/ISEMC.2011.6038425","DOIUrl":"https://doi.org/10.1109/ISEMC.2011.6038425","url":null,"abstract":"Spacecraft exploring solar and planetary plasma effects typically carry a sensitive electric-field measurement instrument operating in the tens of Hz to tens of MHz frequency range. These instruments are subject to unique, non-intuitive interference mechanisms driven by the interaction of direct energy transfer electrical power systems with the surrounding plasma. These mechanisms are not addressed by typical spacecraft EMI control programs based on MIL-STD, Aerospace TOR, or AIAA spacecraft EMI requirements. A direct energy transfer spacecraft power system controls electrical power bus voltage and battery load by switching individual solar array circuits on and off of the system power bus based on battery state of charge and spacecraft loads. This arrangement results in a direct electrical connection between solar array strings and the spacecraft power bus, providing a noise propagation path to the solar arrays. The change in solar array string voltage when switched between loaded and unloaded conditions also changes the net potential of the spacecraft surface with respect to the surrounding plasma, resulting in a \"bounce\" in the voltage relationship between the spacecraft and the surrounding plasma, which is detected by the e-field sensors as noise. This paper describes these phenomena and the techniques used to assess potential effects on the plasma instrument carried on the Juno spacecraft; summarizes the design approach applied to control these effects; and reviews the methods used to verify the effectiveness of the control approach.","PeriodicalId":440959,"journal":{"name":"2011 IEEE International Symposium on Electromagnetic Compatibility","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116007629","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

Empirical estimation of probability distribution for electric field strength in automotive cabin 汽车舱内电场强度概率分布的经验估计

2011 IEEE International Symposium on Electromagnetic Compatibility Pub Date : 2011-10-10 DOI: 10.1109/ISEMC.2011.6038449

N. Maeda, S. Fukui, N. Ishihara, T. Naito

{"title":"Empirical estimation of probability distribution for electric field strength in automotive cabin","authors":"N. Maeda, S. Fukui, N. Ishihara, T. Naito","doi":"10.1109/ISEMC.2011.6038449","DOIUrl":"https://doi.org/10.1109/ISEMC.2011.6038449","url":null,"abstract":"A novel model of the probability distribution for electric field strength in automotive cabin is proposed in the form of a mixture distribution of a linear Rayleigh distribution for low-value data and a log generalized extreme value (GEV) distribution for high-value data. A sample model is estimated from the data measured in a horizontal two-dimensional area above main battery in a hybrid vehicle. For the probability distribution model of the ensemble data of different transmitter antenna directions and all target frequencies, the mixture weights and the parameters for each component distribution are estimated using expectation-maximization (EM) algorithm. The result model showed good fitting to the measured data in probability density function plot and quantile-quantile (Q-Q) plot. Based on the ensemble data distribution model, the probability distribution models for individual conditions of frequencies and antenna-directions are also estimated applying linear transformation. Results are tested using Q-Q plot, which shows good fitting with slight overestimation in very high-value region. Kolmogorov-Smirnov (K-S) goodness of fit test at the 1% significance level also accepts this method for all the data measured above 600MHz.","PeriodicalId":440959,"journal":{"name":"2011 IEEE International Symposium on Electromagnetic Compatibility","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123906306","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

System throughput and immunity analysis of a 802.11n WLAN in a large reverberation chamber 大型混响室中802.11n无线局域网的系统吞吐量和抗扰度分析

2011 IEEE International Symposium on Electromagnetic Compatibility Pub Date : 2011-10-10 DOI: 10.1109/ISEMC.2011.6038430

V. M. Primiani, F. Moglie, R. Recanatini

{"title":"System throughput and immunity analysis of a 802.11n WLAN in a large reverberation chamber","authors":"V. M. Primiani, F. Moglie, R. Recanatini","doi":"10.1109/ISEMC.2011.6038430","DOIUrl":"https://doi.org/10.1109/ISEMC.2011.6038430","url":null,"abstract":"The paper presents some results concerning the use of a reverberation chamber (RC) to test a wireless local area network (WLAN) system based on 802.11n standard. The whole link (root and non-root bridge) operates inside the RC under different chamber loading conditions and varying the stirrer rotating speed. The effects of this multipath environment on system performances are checked measuring three transmission quality estimators: the ping average round trip time, the number of cyclic redundancy check (CRC) error, and the number of data retries. The behavior of these parameters is also analyzed changing the modulation and coding scheme (MCS) index using both one spatial stream and two spatial streams (MIMO). The same RC is used to carry out a radiated immunity test. The undesired signal is both a modulated and continuous wave injected into the active channel and into adjacent channels. The modulated wave is that prescribed by the IEC 61000-4-3 standard. Results reveal the high robustness of the 802.11n standard with respect to b and g standards when it operates in a hostile environment reproduced by an RC.","PeriodicalId":440959,"journal":{"name":"2011 IEEE International Symposium on Electromagnetic Compatibility","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125014796","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

A broadband high-dynamic time-domain system for EMI measurements in K-Band up to 26 GHz 一个宽带高动态时域系统的电磁干扰测量在k波段高达26 GHz

2011 IEEE International Symposium on Electromagnetic Compatibility Pub Date : 2011-10-10 DOI: 10.1109/ISEMC.2011.6038361

C. Hoffmann, P. Russer

{"title":"A broadband high-dynamic time-domain system for EMI measurements in K-Band up to 26 GHz","authors":"C. Hoffmann, P. Russer","doi":"10.1109/ISEMC.2011.6038361","DOIUrl":"https://doi.org/10.1109/ISEMC.2011.6038361","url":null,"abstract":"In this work, a low-noise, high-dynamic time-domain EMI measurement system that allows for measurements from 9 kHz - 26 GHz is presented. It combines ultra-fast analog-to-digital-conversion and real-time digital signal processing on a field-programmable-gate-array (FPGA) with ultra-broadband multi-stage down-conversion. The system IF dynamic range is shown to exceed the requirements of CISPR 16-1-1 by over 20 dB and allows for the measurement of high-dynamic range signals like radar pulses. The system sensitivity is increased by the use of low-loss components and integrated, broadband low-noise amplifiers (LNA). This yields an ultra-low noise floor power spectral density of typically below -150 dBm/Hz over the complete frequency range. The high system sensitivity allows for the characterization of broadband, low-level signals near the noise floor, like ultra-wideband (UWB) communication. Scan time is decreased by several orders of magnitude compared to heterodyne EMI receivers. A scan from 9 kHz to 26 GHz with a 9 kHz IF filter and a dwell-time of 100 ms is completed in under 200 s, while over 5-106 frequency points are calculated.","PeriodicalId":440959,"journal":{"name":"2011 IEEE International Symposium on Electromagnetic Compatibility","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127121758","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

Compact configuration of a planar EBG based CM filter and crosstalk analysis 基于平面EBG的CM滤波器的紧凑结构和串扰分析

2011 IEEE International Symposium on Electromagnetic Compatibility Pub Date : 2011-10-10 DOI: 10.1109/ISEMC.2011.6038400

F. de Paulis, L. Raimondo, B. Archambeault, S. Connor, A. Orlandi

引用次数: 4