Pub Date : 2024-11-13DOI: 10.1109/temc.2024.3486170
Xin Yan, Wei Zhang, Sajjad Sadeghi, Mehdi Gholizadeh, David J. Pommerenke, Daryl G. Beetner
{"title":"Mechanisms for Unwanted Magnetic Field Coupling to a Shielded Magnetic Near-Field Probe","authors":"Xin Yan, Wei Zhang, Sajjad Sadeghi, Mehdi Gholizadeh, David J. Pommerenke, Daryl G. Beetner","doi":"10.1109/temc.2024.3486170","DOIUrl":"https://doi.org/10.1109/temc.2024.3486170","url":null,"abstract":"","PeriodicalId":55012,"journal":{"name":"IEEE Transactions on Electromagnetic Compatibility","volume":"17 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142610606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-12DOI: 10.1109/temc.2024.3486980
Tyler C. Bowman, Thomas Kmieciak, Laura B. Biedermann
{"title":"Nanosecond Transient Validation of Surge Arrester Models to Predict Electromagnetic Pulse Response","authors":"Tyler C. Bowman, Thomas Kmieciak, Laura B. Biedermann","doi":"10.1109/temc.2024.3486980","DOIUrl":"https://doi.org/10.1109/temc.2024.3486980","url":null,"abstract":"","PeriodicalId":55012,"journal":{"name":"IEEE Transactions on Electromagnetic Compatibility","volume":"5 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142601268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-08DOI: 10.1109/temc.2024.3486209
Mona Kalantari, Seyed Hossein Hesamedin Sadeghi
{"title":"An Efficient Surface Integral Equation-Method of Moments for Analysis of Electromagnetic Shielding Effectiveness of a Perforated Isotropic and Lossy Enclosure","authors":"Mona Kalantari, Seyed Hossein Hesamedin Sadeghi","doi":"10.1109/temc.2024.3486209","DOIUrl":"https://doi.org/10.1109/temc.2024.3486209","url":null,"abstract":"","PeriodicalId":55012,"journal":{"name":"IEEE Transactions on Electromagnetic Compatibility","volume":"18 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142597413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-05DOI: 10.1109/TEMC.2024.3485050
Zhaoran Chen;Peiwen Zhang;Junjie Hu;Xiayuan Yao
In this article, a novel conformal frequency selective surface (FSS) with dual reflection bands located at X and Ku bands and a transmission window near 12 GHz is proposed, which brings little aberration in the far-field pattern. The unit cell consists of double flower-shaped strips on an ultrathin dielectric slab. The equivalent circuit model is established by the field distributions to illustrate the resonant mechanism, the parameters of which are calculated. The planar and elliptic cylindrical samples are fabricated and tested. The test results are consistent with simulation data. The two samples’ averages of shielding effectiveness are no less than 16 dB. The insertion losses of the planar and the curved FSS are less than 1 dB in the passband. The near-field distributions in three concerned bands are scanned. The conformal FSS excites slight distortion in the passband but stirs the distributions into a mess, the electric field intensity of which drops by 20 dB in the stopbands. Moreover, the absolute gains in the passband are tested in compact antenna test range. The far-field pattern is also evaluated by near-field to far-field method. The data obtained by two methods is consistent with the simulation. Little aberration by the FSS occurs in the passband, and the average gain's deviation is no more than 0.64 dB.
{"title":"Flexible Dual Flower-Shaped FSS for Conformal Applications With Low Aberration of Far-Field Pattern","authors":"Zhaoran Chen;Peiwen Zhang;Junjie Hu;Xiayuan Yao","doi":"10.1109/TEMC.2024.3485050","DOIUrl":"10.1109/TEMC.2024.3485050","url":null,"abstract":"In this article, a novel conformal frequency selective surface (FSS) with dual reflection bands located at X and Ku bands and a transmission window near 12 GHz is proposed, which brings little aberration in the far-field pattern. The unit cell consists of double flower-shaped strips on an ultrathin dielectric slab. The equivalent circuit model is established by the field distributions to illustrate the resonant mechanism, the parameters of which are calculated. The planar and elliptic cylindrical samples are fabricated and tested. The test results are consistent with simulation data. The two samples’ averages of shielding effectiveness are no less than 16 dB. The insertion losses of the planar and the curved FSS are less than 1 dB in the passband. The near-field distributions in three concerned bands are scanned. The conformal FSS excites slight distortion in the passband but stirs the distributions into a mess, the electric field intensity of which drops by 20 dB in the stopbands. Moreover, the absolute gains in the passband are tested in compact antenna test range. The far-field pattern is also evaluated by near-field to far-field method. The data obtained by two methods is consistent with the simulation. Little aberration by the FSS occurs in the passband, and the average gain's deviation is no more than 0.64 dB.","PeriodicalId":55012,"journal":{"name":"IEEE Transactions on Electromagnetic Compatibility","volume":"66 6","pages":"1744-1758"},"PeriodicalIF":2.0,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142588506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-01DOI: 10.1109/TEMC.2024.3481493
Stefan Tolle;Daniel Kübrich;Stephan Frei
The filters of power converter systems typically have to attenuate electromagnetic interference (EMI) to a very large degree. This makes them bulky and heavy. Active EMI filters (AEF) can reduce the filter size and weight. Feedforward (FF) AEF topologies are best suited for good stability at varying grid impedances. Until now, FF topologies were discussed only for low-power systems, where the parasitic behavior of the circuit elements can be controlled easily. This contribution introduces an FF-AEF design that can be used in medium and high power three-phase ac–dc converter systems with varying grid impedances without the need to redesign the AEF. To improve the performance, a second-order high-pass filter is added and a current source for injecting the compensation current is optimized for compensating the parasitic inductance of the injection capacitor. The improved AEF is tested and analyzed in a simple common mode test circuit and a complex bidirectional 16 kW ac–dc converter system. An attenuation of 30 dB between 60 kHz and 400 kHz and a maximum attenuation of more than 42 dB at 150 kHz has been achieved.
{"title":"An Active EMI Filter for Robust Integration in Medium and High-Power AC/DC Converters","authors":"Stefan Tolle;Daniel Kübrich;Stephan Frei","doi":"10.1109/TEMC.2024.3481493","DOIUrl":"10.1109/TEMC.2024.3481493","url":null,"abstract":"The filters of power converter systems typically have to attenuate electromagnetic interference (EMI) to a very large degree. This makes them bulky and heavy. Active EMI filters (AEF) can reduce the filter size and weight. Feedforward (FF) AEF topologies are best suited for good stability at varying grid impedances. Until now, FF topologies were discussed only for low-power systems, where the parasitic behavior of the circuit elements can be controlled easily. This contribution introduces an FF-AEF design that can be used in medium and high power three-phase ac–dc converter systems with varying grid impedances without the need to redesign the AEF. To improve the performance, a second-order high-pass filter is added and a current source for injecting the compensation current is optimized for compensating the parasitic inductance of the injection capacitor. The improved AEF is tested and analyzed in a simple common mode test circuit and a complex bidirectional 16 kW ac–dc converter system. An attenuation of 30 dB between 60 kHz and 400 kHz and a maximum attenuation of more than 42 dB at 150 kHz has been achieved.","PeriodicalId":55012,"journal":{"name":"IEEE Transactions on Electromagnetic Compatibility","volume":"66 6","pages":"1769-1779"},"PeriodicalIF":2.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142563086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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