Pub Date : 2020-09-23DOI: 10.1109/EMCEUROPE48519.2020.9245810
Taiki Yamagiwa, Y. Kayano, Y. Kami, F. Xiao
In recent years, the development of electronic devices are trending to be smaller and lighter, the techniques for suppressing electromagnetic (EM) radiation need to comply with these trends. EM shields are widely used to suppress EM radiation from transmission lines. EM shield for interconnection cable such as flexible-printed-circuits (FPC) requires flexibility of shielding-material. Consequently, EM shield becomes much more thin metallic shield and may be implemented near the transmission lines in the future. However, frequency response of the transmission coefficients of the shielded-FPC has dispersion due to insufficient shielding performance for near magnetic field. Elucidating the relationship between dispersion of frequency response and time response of transmission characteristics of shielded-FPC turns to be an important indicator of shielding techniques. In this paper, experimental extraction has been proposed for detailed investigating the frequency dispersion of shielded-FPC by using the RLGC equivalent-circuit model. The experimental extraction method used S-parameters measured by using vector network analyzer. The unnecessary components such as connectors are compensated correctly by using proposed method. The frequency response of primary and secondary parameters extracted using the proposed method reproduces all the dispersion characteristics of shielded-FPC successfully. More importantly, quantitative evaluation using the RLGC equivalent-circuit model considering dispersion characteristics can be performed experimentally.
{"title":"Experimental Extraction Method for Primary and Secondary Parameters of Shielded-Flexible Printed Circuits","authors":"Taiki Yamagiwa, Y. Kayano, Y. Kami, F. Xiao","doi":"10.1109/EMCEUROPE48519.2020.9245810","DOIUrl":"https://doi.org/10.1109/EMCEUROPE48519.2020.9245810","url":null,"abstract":"In recent years, the development of electronic devices are trending to be smaller and lighter, the techniques for suppressing electromagnetic (EM) radiation need to comply with these trends. EM shields are widely used to suppress EM radiation from transmission lines. EM shield for interconnection cable such as flexible-printed-circuits (FPC) requires flexibility of shielding-material. Consequently, EM shield becomes much more thin metallic shield and may be implemented near the transmission lines in the future. However, frequency response of the transmission coefficients of the shielded-FPC has dispersion due to insufficient shielding performance for near magnetic field. Elucidating the relationship between dispersion of frequency response and time response of transmission characteristics of shielded-FPC turns to be an important indicator of shielding techniques. In this paper, experimental extraction has been proposed for detailed investigating the frequency dispersion of shielded-FPC by using the RLGC equivalent-circuit model. The experimental extraction method used S-parameters measured by using vector network analyzer. The unnecessary components such as connectors are compensated correctly by using proposed method. The frequency response of primary and secondary parameters extracted using the proposed method reproduces all the dispersion characteristics of shielded-FPC successfully. More importantly, quantitative evaluation using the RLGC equivalent-circuit model considering dispersion characteristics can be performed experimentally.","PeriodicalId":332251,"journal":{"name":"2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123652555","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 : 2020-09-23DOI: 10.1109/EMCEUROPE48519.2020.9245855
Daiki Kameyama, K. Iokibe, Y. Toyota
We investigated impedance discontinuity detection on a wire network by applying sequence time domain reflectometry (STDR) using maximal-length sequence (M-sequence). We focused on impedance discontinuity detection under multiple reflection generated at nodes on a wire network. We first conducted a preliminary investigation of impedance discontinuity detection on a wire network with one node and confirmed that STDR resulting in cross-correlation of the observed signal with transmitted pulse train exhibits higher noise immunity than conventional TDR. We then demonstrated that STDR can distinguish the impedance discontinuity of various (resistive, inductive, and capacitive) impedance variations on a wire from the shape of the correlation response. Finally, we demonstrated that STDR can detect the location of impedance discontinuity due to small inductance and capacitance on a simple wire network with four nodes.
{"title":"Preliminary Investigation of Impedance Discontinuity Detection on Wire Network Using Sequence Time Domain Reflectometry","authors":"Daiki Kameyama, K. Iokibe, Y. Toyota","doi":"10.1109/EMCEUROPE48519.2020.9245855","DOIUrl":"https://doi.org/10.1109/EMCEUROPE48519.2020.9245855","url":null,"abstract":"We investigated impedance discontinuity detection on a wire network by applying sequence time domain reflectometry (STDR) using maximal-length sequence (M-sequence). We focused on impedance discontinuity detection under multiple reflection generated at nodes on a wire network. We first conducted a preliminary investigation of impedance discontinuity detection on a wire network with one node and confirmed that STDR resulting in cross-correlation of the observed signal with transmitted pulse train exhibits higher noise immunity than conventional TDR. We then demonstrated that STDR can distinguish the impedance discontinuity of various (resistive, inductive, and capacitive) impedance variations on a wire from the shape of the correlation response. Finally, we demonstrated that STDR can detect the location of impedance discontinuity due to small inductance and capacitance on a simple wire network with four nodes.","PeriodicalId":332251,"journal":{"name":"2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121887593","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 : 2020-09-23DOI: 10.1109/EMCEUROPE48519.2020.9245797
I. Dergham, Juan-Carlos Martinez Rocha, Rodrigue Imad, Y. Alayli
In his paper, the authors study the effect of a static wireless charging system designed for a mobility scooter. The increase in the temperature of the scooter chassis and the impact of the system's magnetic field leakage on human health are presented in this paper. A model under the Finite Element Method software COMSOL multi-physics has been realized. The magnetic field and heat transfer physics are simulated to study the elevation of the scooter’s chassis temperature due to exposure to the magnetic field generated by the wireless charging system. The magnetic flux streamlines and its density near the human body are also presented in this paper and compared to the guidelines limit fixed by the International Commission on Non-Ionizing Radiation Protection. Furthermore, an overview of the concept of inductive resonant transfer and the necessity of shielding the wireless charging system is presented in this paper. Results show a low increase in temperature of the chassis and no significant effect on human health compared to the guidelines norms.
{"title":"Effect of wireless charging of mobility scooters on human health and temperature increase of their chassis","authors":"I. Dergham, Juan-Carlos Martinez Rocha, Rodrigue Imad, Y. Alayli","doi":"10.1109/EMCEUROPE48519.2020.9245797","DOIUrl":"https://doi.org/10.1109/EMCEUROPE48519.2020.9245797","url":null,"abstract":"In his paper, the authors study the effect of a static wireless charging system designed for a mobility scooter. The increase in the temperature of the scooter chassis and the impact of the system's magnetic field leakage on human health are presented in this paper. A model under the Finite Element Method software COMSOL multi-physics has been realized. The magnetic field and heat transfer physics are simulated to study the elevation of the scooter’s chassis temperature due to exposure to the magnetic field generated by the wireless charging system. The magnetic flux streamlines and its density near the human body are also presented in this paper and compared to the guidelines limit fixed by the International Commission on Non-Ionizing Radiation Protection. Furthermore, an overview of the concept of inductive resonant transfer and the necessity of shielding the wireless charging system is presented in this paper. Results show a low increase in temperature of the chassis and no significant effect on human health compared to the guidelines norms.","PeriodicalId":332251,"journal":{"name":"2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"361 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124803447","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 : 2020-09-23DOI: 10.1109/EMCEUROPE48519.2020.9245817
I. Wu, Y. Matsumoto, K. Gotoh, K. Wake, Soichi Watanabe
To improve the accuracy of probe calibration in the non-linear response region of the probe for modulated signals, a method using the continuous wave calibration curve and the probability distribution function of the modulated signal was proposed. This method can be applied when the bandwidth of the signal is sufficiently wide. However, when this method is applied to multicarrier signals such as orthogonal frequency division multiplexing signals, the result estimated by this method appears higher than the measured result, especially in the region of the non-linear response of the probe. In this study, we examined the difference between the output voltage estimated by the proposed method and the measured result in the non-linear region of the probe using orthogonal frequency division multiplexing access (OFDMA) signals as an example. To clarify the characteristics of the signal after diode detection, the envelope spectrum of the OFDMA signal was investigated. As a result, the OFDMA signal contains many low frequency components, and the low frequency component of the OFDMA signal is a factor which lowers the output voltage of the probe.
{"title":"The Effect of Nonlinear Characteristics of an Electric Field Probe on Detection Response to OFDMA Signal","authors":"I. Wu, Y. Matsumoto, K. Gotoh, K. Wake, Soichi Watanabe","doi":"10.1109/EMCEUROPE48519.2020.9245817","DOIUrl":"https://doi.org/10.1109/EMCEUROPE48519.2020.9245817","url":null,"abstract":"To improve the accuracy of probe calibration in the non-linear response region of the probe for modulated signals, a method using the continuous wave calibration curve and the probability distribution function of the modulated signal was proposed. This method can be applied when the bandwidth of the signal is sufficiently wide. However, when this method is applied to multicarrier signals such as orthogonal frequency division multiplexing signals, the result estimated by this method appears higher than the measured result, especially in the region of the non-linear response of the probe. In this study, we examined the difference between the output voltage estimated by the proposed method and the measured result in the non-linear region of the probe using orthogonal frequency division multiplexing access (OFDMA) signals as an example. To clarify the characteristics of the signal after diode detection, the envelope spectrum of the OFDMA signal was investigated. As a result, the OFDMA signal contains many low frequency components, and the low frequency component of the OFDMA signal is a factor which lowers the output voltage of the probe.","PeriodicalId":332251,"journal":{"name":"2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128298933","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 : 2020-09-23DOI: 10.1109/EMCEUROPE48519.2020.9245859
Mubarack Ahmed, G. Gradoni, S. Creagh, C. Smartt, S. Greedy, G. Tanner
We investigate energy distribution in cable networks using random coupling model (RCM). RCM is used to model the propagation of microwaves in large complicated cavities. The model is made up of two main parts where one part is deterministic and the other is purely statistical. Both parts have been modelled using Quantum Graph (QG) theory and the properties of field quantities are presented. The effects of various boundary conditions on the behaviour of microwaves is discussed. Fourier boundary conditions at graph nodes, high loss regime (α > 1), and weakly coupled graphs ensures that QG model qualifies as an analogue of standard RCM. For Neumann boundary conditions, significant deviations from RCM are found. Analytical expressions of both the deterministic and the statistical parts are presented and shown to accurately predict the distribution of the latter.
{"title":"Distribution of Energy through Cable Networks using Random Coupling Model","authors":"Mubarack Ahmed, G. Gradoni, S. Creagh, C. Smartt, S. Greedy, G. Tanner","doi":"10.1109/EMCEUROPE48519.2020.9245859","DOIUrl":"https://doi.org/10.1109/EMCEUROPE48519.2020.9245859","url":null,"abstract":"We investigate energy distribution in cable networks using random coupling model (RCM). RCM is used to model the propagation of microwaves in large complicated cavities. The model is made up of two main parts where one part is deterministic and the other is purely statistical. Both parts have been modelled using Quantum Graph (QG) theory and the properties of field quantities are presented. The effects of various boundary conditions on the behaviour of microwaves is discussed. Fourier boundary conditions at graph nodes, high loss regime (α > 1), and weakly coupled graphs ensures that QG model qualifies as an analogue of standard RCM. For Neumann boundary conditions, significant deviations from RCM are found. Analytical expressions of both the deterministic and the statistical parts are presented and shown to accurately predict the distribution of the latter.","PeriodicalId":332251,"journal":{"name":"2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128667936","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 : 2020-09-23DOI: 10.1109/EMCEUROPE48519.2020.9245862
Z. Joskiewicz, J. Janukiewicz
This paper presents measurements method as well as some measurement results of electromagnetic shielding effectiveness (SE) performed for an example of multilayer protective material incorporated in storage pouch, which was dedicated to protect bank cards, car keyless and radio key system against theft of personal belongings or data by contactless or radio hacker attacks. Measurements of EM shielding effectiveness were performed separately in frequency range from 1 MHz to 30 MHz using loop antennas for magnetic field and in frequency range from 10 MHz to 8.5 GHz adopting ASTM D4935-10 method for electric field. Measurements were conducted for a reference sample – a brand new multilayer material "used to fabricate a protective storage pouch as well as for two samples of the same material obtained from different protective storage pouches after their one year usage to protect contactless remote car keys and bank cards. Obtained results showed a significant degradation of the shielding effectiveness values of protective material after one year usage due mechanical, environmental and chemical factors, and finally a lower level of electromagnetic protection of the storage pouch.
{"title":"Experimental Study of the Shielding Effectiveness Performance Degradation for a Shielding Material Used in Protective Storage Pouch","authors":"Z. Joskiewicz, J. Janukiewicz","doi":"10.1109/EMCEUROPE48519.2020.9245862","DOIUrl":"https://doi.org/10.1109/EMCEUROPE48519.2020.9245862","url":null,"abstract":"This paper presents measurements method as well as some measurement results of electromagnetic shielding effectiveness (SE) performed for an example of multilayer protective material incorporated in storage pouch, which was dedicated to protect bank cards, car keyless and radio key system against theft of personal belongings or data by contactless or radio hacker attacks. Measurements of EM shielding effectiveness were performed separately in frequency range from 1 MHz to 30 MHz using loop antennas for magnetic field and in frequency range from 10 MHz to 8.5 GHz adopting ASTM D4935-10 method for electric field. Measurements were conducted for a reference sample – a brand new multilayer material \"used to fabricate a protective storage pouch as well as for two samples of the same material obtained from different protective storage pouches after their one year usage to protect contactless remote car keys and bank cards. Obtained results showed a significant degradation of the shielding effectiveness values of protective material after one year usage due mechanical, environmental and chemical factors, and finally a lower level of electromagnetic protection of the storage pouch.","PeriodicalId":332251,"journal":{"name":"2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130088676","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 : 2020-09-23DOI: 10.1109/EMCEUROPE48519.2020.9245752
Kiyoto Matsushima, U. Paoletti, K. Fukumasu
Electromagnetic common-mode noise current generated by inverter switching makes a huge loop in car bodies and rails and might cause interference with on-board equipment. We propose a simulation method for the approximate transmission line for inverter common-mode noise to simulate such a large-scale model within a reasonable time. Our simulation results agree quite well with the hybrid simulation results up to 5 MHz, including the major transponder signal frequencies.
{"title":"Simulation Method for Inverter Common-mode Noise at the Whole Train Level","authors":"Kiyoto Matsushima, U. Paoletti, K. Fukumasu","doi":"10.1109/EMCEUROPE48519.2020.9245752","DOIUrl":"https://doi.org/10.1109/EMCEUROPE48519.2020.9245752","url":null,"abstract":"Electromagnetic common-mode noise current generated by inverter switching makes a huge loop in car bodies and rails and might cause interference with on-board equipment. We propose a simulation method for the approximate transmission line for inverter common-mode noise to simulate such a large-scale model within a reasonable time. Our simulation results agree quite well with the hybrid simulation results up to 5 MHz, including the major transponder signal frequencies.","PeriodicalId":332251,"journal":{"name":"2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128973196","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 : 2020-09-23DOI: 10.1109/EMCEUROPE48519.2020.9245795
Syed Muhammad Qasim Ali Shah, Fahad Ahmed, Tania Tamoor, T. Hassan, Sana Ilyas, N. Shoaib
An ultrathin and flexible frequency selective surface (FSS) is proposed in order to obtain band-stop electromagnetic interference (EMI) shielding. The proposed structure is modeled on flexible ultrathin (polyimide) substrate. Greater than 10 dB attenuation is achieved within the frequency band of 7.79 GHz to 12.57 GHz with maximum attenuation of 60 dB at 10.07 GHz (fractional bandwidth of 46.95%) to provide effective EM shielding. The angular stability up to 45o, polarization insensitivity and ultrathin flexible structure make it a promising candidate for EM shielding applications in X- band.
{"title":"A Flexible and Ultrathin FSS for EM Shielding Applications","authors":"Syed Muhammad Qasim Ali Shah, Fahad Ahmed, Tania Tamoor, T. Hassan, Sana Ilyas, N. Shoaib","doi":"10.1109/EMCEUROPE48519.2020.9245795","DOIUrl":"https://doi.org/10.1109/EMCEUROPE48519.2020.9245795","url":null,"abstract":"An ultrathin and flexible frequency selective surface (FSS) is proposed in order to obtain band-stop electromagnetic interference (EMI) shielding. The proposed structure is modeled on flexible ultrathin (polyimide) substrate. Greater than 10 dB attenuation is achieved within the frequency band of 7.79 GHz to 12.57 GHz with maximum attenuation of 60 dB at 10.07 GHz (fractional bandwidth of 46.95%) to provide effective EM shielding. The angular stability up to 45o, polarization insensitivity and ultrathin flexible structure make it a promising candidate for EM shielding applications in X- band.","PeriodicalId":332251,"journal":{"name":"2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131081894","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 : 2020-09-23DOI: 10.1109/EMCEUROPE48519.2020.9245730
Binwen Wang, Tingyong Jiang, Zhen Liu, Hui Ning, Lei Shi
The original resistive network of the introduced ETS-GTEM5411 cell with the size of 5.4 m×2.7 m×2.2 m (L×W×H) presents an inferior absorption performance at low frequencies. In this paper, a fan-shaped resistive network is proposed. Compared with the original resistive network, the proposed resistive network brings an improvement of about 10 dB to the absorption performance of the GTEM cell, over a frequency range less than 0.1 GHz, without considering the pyramid absorbers. And the upper limit frequency of the return loss below -20 dB reaches to 0.08 GHz. The simulated results show that the proposed resistive network is effective for GTEM cells of different sizes.
引入的ETS-GTEM5411电池的原始电阻网络尺寸为5.4 m×2.7 m×2.2 m (L×W×H)，低频吸收性能较差。本文提出了一种扇形电阻网络。在不考虑金字塔吸收器的情况下，在小于0.1 GHz的频率范围内，与原电阻网络相比，所提出的电阻网络使GTEM蜂窝的吸收性能提高了约10 dB。回波损耗在-20 dB以下的上限频率达到0.08 GHz。仿真结果表明，所提出的电阻网络对于不同尺寸的GTEM电池都是有效的。
{"title":"Optimization of the GTEM Cell Resistive Network","authors":"Binwen Wang, Tingyong Jiang, Zhen Liu, Hui Ning, Lei Shi","doi":"10.1109/EMCEUROPE48519.2020.9245730","DOIUrl":"https://doi.org/10.1109/EMCEUROPE48519.2020.9245730","url":null,"abstract":"The original resistive network of the introduced ETS-GTEM5411 cell with the size of 5.4 m×2.7 m×2.2 m (L×W×H) presents an inferior absorption performance at low frequencies. In this paper, a fan-shaped resistive network is proposed. Compared with the original resistive network, the proposed resistive network brings an improvement of about 10 dB to the absorption performance of the GTEM cell, over a frequency range less than 0.1 GHz, without considering the pyramid absorbers. And the upper limit frequency of the return loss below -20 dB reaches to 0.08 GHz. The simulated results show that the proposed resistive network is effective for GTEM cells of different sizes.","PeriodicalId":332251,"journal":{"name":"2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132384825","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 : 2020-09-23DOI: 10.1109/EMCEUROPE48519.2020.9245755
Ning Shen, Liping Yan, Xiang Zhao, Richard Xian-Ke Gao
This paper presents the shielding effectiveness (SE) study for enclosure incorporating a newly developed frequency selective surface (FSS) with consideration of the ratio of vent hole array and the oblique wave incidence. Not only is the SE at the center of the enclosure analyzed, but also the global shielding effectiveness (GSE) is evaluated as a complementary approach for more reasonable prediction. Compared to an enclosure commonly shielded by metal with the same vent hole array, the shielding effectiveness of the enclosure with the FSS shield is about 20 dB higher in the frequency range of 23 GHz - 25.5 GHz, which meet the requirements of SE >= 30 dB and BW|SE=30dB > 2 GHz. The results also show that the ratio of vent hole array to one surface of the enclosure has impact on the shielding effectiveness of enclosure. Importantly, the study indicates that FSS technology can be a promising alternative when conventional metallic shielding is limited due to ventilation requirement in the high frequency applications.
{"title":"Electromagnetic Shielding Effectiveness Analysis of Enclosure Incorporating Frequency Selective Surface","authors":"Ning Shen, Liping Yan, Xiang Zhao, Richard Xian-Ke Gao","doi":"10.1109/EMCEUROPE48519.2020.9245755","DOIUrl":"https://doi.org/10.1109/EMCEUROPE48519.2020.9245755","url":null,"abstract":"This paper presents the shielding effectiveness (SE) study for enclosure incorporating a newly developed frequency selective surface (FSS) with consideration of the ratio of vent hole array and the oblique wave incidence. Not only is the SE at the center of the enclosure analyzed, but also the global shielding effectiveness (GSE) is evaluated as a complementary approach for more reasonable prediction. Compared to an enclosure commonly shielded by metal with the same vent hole array, the shielding effectiveness of the enclosure with the FSS shield is about 20 dB higher in the frequency range of 23 GHz - 25.5 GHz, which meet the requirements of SE >= 30 dB and BW|SE=30dB > 2 GHz. The results also show that the ratio of vent hole array to one surface of the enclosure has impact on the shielding effectiveness of enclosure. Importantly, the study indicates that FSS technology can be a promising alternative when conventional metallic shielding is limited due to ventilation requirement in the high frequency applications.","PeriodicalId":332251,"journal":{"name":"2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130445689","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：