IEEE Transactions on Electromagnetic Compatibility最新文献_第8页

An Efficient Surface Integral Equation-Method of Moments for Analysis of Electromagnetic Shielding Effectiveness of a Perforated Isotropic and Lossy Enclosure 用于分析穿孔各向同性损耗围护结构电磁屏蔽效果的高效表面积分方程-矩量法

IF 2 3区计算机科学

IEEE Transactions on Electromagnetic Compatibility Pub Date : 2024-11-08 DOI: 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":"10.1109/TEMC.2024.3486209","url":null,"abstract":"In this article, we introduce an efficient method of moments (MoM) to evaluate the electromagnetic shielding effectiveness of a perforated, isotropic, and lossy enclosure. Initially, we delineate the various homogeneous regions within the enclosure. Utilizing the surface equivalence theorem, we replace the interfaces between adjacent regions with appropriate electric and magnetic current densities, adhering to boundary conditions. The resulting surface integral equations (SIEs) are then numerically solved for the unknown current densities using the Galerkin-MoM. This process involves the inversion of a block impedance matrix with relatively modest size and condition number in each block, achieved through a block-inversion technique that significantly reduces computational demands. Notably, there are no restrictions on the number, location, size, or shape of apertures. The method's efficiency and precision are substantiated by comparing the results from several case studies against those obtained using the existing methods in the literature and a commercially available SIE code. It is demonstrated that the shielding effectiveness is profoundly influenced by the operating frequency, loss tangent, wall thickness, and aperture size due to attenuation in the wall thickness, reflections at the wall surfaces, and multiple internal reflections.","PeriodicalId":55012,"journal":{"name":"IEEE Transactions on Electromagnetic Compatibility","volume":"67 1","pages":"99-107"},"PeriodicalIF":2.0,"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}

引用次数: 0

Estimating the Perception Threshold of Electrostimulation and Heating for Radiofrequency Contact Current 估计射频接触电流的电刺激和加热感知阈值

IF 2.1 3区计算机科学

IEEE Transactions on Electromagnetic Compatibility Pub Date : 2024-11-05 DOI: 10.1109/temc.2024.3483168

Sachiko Kodera, Shoya Kimura, Shintaro Uehara, Akiko Yuasa, Kazuki Ushizawa, Yohei Otaka, Akimasa Hirata

引用次数: 0

Flexible Dual Flower-Shaped FSS for Conformal Applications With Low Aberration of Far-Field Pattern 用于共形应用的柔性双花形 FSS，远场图案畸变小

IF 2 3区计算机科学

IEEE Transactions on Electromagnetic Compatibility Pub Date : 2024-11-05 DOI: 10.1109/TEMC.2024.3485050

Zhaoran Chen;Peiwen Zhang;Junjie Hu;Xiayuan Yao

{"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}

引用次数: 0

Risk Assessment of Deep Brain Stimulator Implant Against Incident Lightning Electromagnetic Radiation 深部脑刺激器植入体对雷电电磁辐射的风险评估

IF 2 3区计算机科学

IEEE Transactions on Electromagnetic Compatibility Pub Date : 2024-11-01 DOI: 10.1109/TEMC.2024.3482170

Anjitha V;Sunitha K

{"title":"Risk Assessment of Deep Brain Stimulator Implant Against Incident Lightning Electromagnetic Radiation","authors":"Anjitha V;Sunitha K","doi":"10.1109/TEMC.2024.3482170","DOIUrl":"10.1109/TEMC.2024.3482170","url":null,"abstract":"Deep brain stimulators (DBSs) have several therapeutic uses, including the treatment of movement and nonmovement disorders, and hence the global market for DBS implants is growing. Nevertheless, research has demonstrated that external electromagnetic fields interact with these implants within the human body, leading to variations in their operational state; several examples of these interactions have already been measured. However, clinical journal case studies have revealed that lightning strikes have notable consequences on active implants that have not yet been measured. Hence this article attempts to quantify the response of DBS implants when exposed to lightning electromagnetic fields (LEMFs). The field penetration into a homogeneous human body in and around the implant is quantified and undesirable variations in the stimulus output of DBS is measured. For a vicinity lightning strike at 10 m, peak value of penetrated electric field strength is computed to be 3.61 kV/cm and a magnetic field strength of 4.81 A/cm. Also an impulse current of 2 mA peak gets coupled along with the real time stimulus current pulse output of DBS, thus causing unbalanced charge injection into human tissue. Further study on various lightning strike distance affirmed an ineffective shielding of the implant and undesirable pick up of LEMF impulse by implant lead electrode.","PeriodicalId":55012,"journal":{"name":"IEEE Transactions on Electromagnetic Compatibility","volume":"67 1","pages":"72-81"},"PeriodicalIF":2.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142563084","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}

引用次数: 0

An Active EMI Filter for Robust Integration in Medium and High-Power AC/DC Converters 用于中大功率 AC/DC 转换器稳健集成的有源 EMI 滤波器

IF 2 3区计算机科学

IEEE Transactions on Electromagnetic Compatibility Pub Date : 2024-11-01 DOI: 10.1109/TEMC.2024.3481493

Stefan Tolle;Daniel Kübrich;Stephan Frei

{"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}

引用次数: 0

Bayesian Compressive Sensing Enabled EMI Source Localization in Shielding Enclosures From Complex and Phaseless Near-Field Scanning 贝叶斯压缩传感通过复杂的无相近场扫描实现屏蔽外壳中的 EMI 源定位

IF 2 3区计算机科学

IEEE Transactions on Electromagnetic Compatibility Pub Date : 2024-10-31 DOI: 10.1109/TEMC.2024.3482849

Zi An Wang;Yu-Xu Liu;Ping Li

{"title":"Bayesian Compressive Sensing Enabled EMI Source Localization in Shielding Enclosures From Complex and Phaseless Near-Field Scanning","authors":"Zi An Wang;Yu-Xu Liu;Ping Li","doi":"10.1109/TEMC.2024.3482849","DOIUrl":"10.1109/TEMC.2024.3482849","url":null,"abstract":"Electromagnetic interference (EMI) can disrupt the operation and reliability of electronic devices, thus effective shielding and detection of EMI sources are crucial to mitigate these issues. However, locating EMI sources in shielding enclosures is a challenging task due to the complex electromagnetic (EM) environment. Compared to conventional methods that demand dense spatial sampling and lengthy data acquisition, this article proposes an efficient approach to locate EMI sources based on the compressive sensing (CS) of complex or phaseless near-field (NF) data. The internal EMI sources are modeled as equivalent dipoles in the enclosure through the use of numerical Green's function (NGF). With the help of the CS framework, the required NF measurements can be largely reduced. By further resorting to the reciprocity theorem, a large amount of CPU cost involved in the NGF evaluation can be saved, thus accelerating the construction of the matrix equation that connects the equivalent dipole sources and the NF data. To solve this highly ill-posed inverse problem arising from high-coherent under-sampled NF data, a multitask Bayesian compressive sensing (MT-BCS) algorithm is employed, facilitating reliable reconstruction of sparsely distributed EMI sources. Moreover, to meet the need for more accurate and convenient magnitude-only measurements in high-frequency scenarios, this work proposes a phaseless mapping technique to linearize the nonlinear problem caused by phaseless data, and further develops a tailored MT-BCS strategy to enable robust and efficient reconstruction from limited phaseless NF measurements. Numerical and experimental results demonstrate the effectiveness, robustness, and high efficiency of the proposed method. This novel methodology offers powerful capabilities for practical EMI diagnostics and other EM inverse problems.","PeriodicalId":55012,"journal":{"name":"IEEE Transactions on Electromagnetic Compatibility","volume":"67 1","pages":"158-173"},"PeriodicalIF":2.0,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142561819","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}

引用次数: 0

Design and Analysis of 0.5–2.0 GHz RF Frontend Subsystems for IEMI Applications 为 IEMI 应用设计和分析 0.5-2.0 GHz 射频前端子系统

IF 2 3区计算机科学

IEEE Transactions on Electromagnetic Compatibility Pub Date : 2024-10-31 DOI: 10.1109/TEMC.2024.3480975

Pallepogu Prasanna Kumar;Patnam Hanumantha Rao;Saurabh Saxena

{"title":"Design and Analysis of 0.5–2.0 GHz RF Frontend Subsystems for IEMI Applications","authors":"Pallepogu Prasanna Kumar;Patnam Hanumantha Rao;Saurabh Saxena","doi":"10.1109/TEMC.2024.3480975","DOIUrl":"10.1109/TEMC.2024.3480975","url":null,"abstract":"We present RF frontend subsystems for detecting intentional electromagnetic interference (IEMI) over 0.5–2 GHz. The frontend includes a printed log periodic antenna and integrated attenuator cum fourth-order bandpass filter. First, the proposed antenna incorporates trapezoidal shape reflectors with L-shape load, spilt ring resonators, rectangular strips with trapezoid-shaped variation, and periodic strips. The antenna occupies a volume of 320 × 250 × 1.6 <inline-formula><tex-math>$rm mm^{3}$</tex-math></inline-formula>. A good impedance matching and the minimum gain variation of 0.72 dBi with an average gain of 4.5 dBi are demonstrated in measurements for the fabricated prototype. Second, a cascade of a 5 dB attenuator and a second-order bandpass filter (BPF) are integrated on both sides of an FR4 epoxy multilayer substrate, thereby realizing an integrated 10 dB attenuator cum fourth-order filter prototype. The second-order BPF is designed with short-circuited stubs and miniaturized with stepped-impedance resonators and meander lines. The attenuator is implemented with passive <inline-formula><tex-math>$pi$</tex-math></inline-formula>-network. The attenuator-cum-filter prototype occupies 40 × 35 × 1.6 <inline-formula><tex-math>$rm mm^{3}$</tex-math></inline-formula>. On measurement, the fabricated prototype shows desired impedance matching and attenuation of 12–13.6 dB over 0.5–1.7 GHz and 13.6–16.16 dB over 1.7–2 GHz. It has a wide stopband with <inline-formula><tex-math>$|S_{21}| < -40$</tex-math></inline-formula> dB over 2.4–4 GHz. Further, we demonstrate the reception of voltage scaled IEMI signals using the proposed RF frontend subsystems.","PeriodicalId":55012,"journal":{"name":"IEEE Transactions on Electromagnetic Compatibility","volume":"67 1","pages":"237-246"},"PeriodicalIF":2.0,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142561821","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}

引用次数: 0

An Optimized Adaptive Bayesian Algorithm for Mitigating EMI-Induced Errors in Dynamic Electromagnetic Environments 在动态电磁环境中减少电磁干扰误差的优化自适应贝叶斯算法

IF 2 3区计算机科学

IEEE Transactions on Electromagnetic Compatibility Pub Date : 2024-10-29 DOI: 10.1109/TEMC.2024.3482565

Miriam Gonzalez-Atienza;Dries Vanoost;Mathias Verbeke;Davy Pissoort

{"title":"An Optimized Adaptive Bayesian Algorithm for Mitigating EMI-Induced Errors in Dynamic Electromagnetic Environments","authors":"Miriam Gonzalez-Atienza;Dries Vanoost;Mathias Verbeke;Davy Pissoort","doi":"10.1109/TEMC.2024.3482565","DOIUrl":"10.1109/TEMC.2024.3482565","url":null,"abstract":"Robust and reliable communication is a necessity for maintaining the integrity of electronic systems. However, this can be severely impacted by electromagnetic interference (EMI) and the increasing complexity of electromagnetic environments, which introduces new sources of uncertainty. Fortunately, adaptive learning strategies provide promising solutions to overcome these obstacles. In this study, we have evaluated the performance of an adaptive Bayesian decision algorithm that can effectively mitigate the impact of EMI in triple modular redundant channels subjected to multiple single-frequency disturbances. The proposed strategy for hyperparameter tuning allows for optimization of data accuracy and availability. Compared to conventional supervised machine learning techniques, the inherent adaptive capabilities of the Bayesian approach demonstrate superior performance by dynamically adjusting to changes in the received symbol distributions, particularly under conditions of high symbol error rates. This adaptability proved crucial in achieving high classification accuracy (92.59%). The proposed adaptive Bayesian algorithm stands out for its robustness and enhanced performance, presenting a promising solution for its application to dynamic electromagnetic environments characterized by high variability and uncertainty.","PeriodicalId":55012,"journal":{"name":"IEEE Transactions on Electromagnetic Compatibility","volume":"66 6","pages":"2085-2094"},"PeriodicalIF":2.0,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142541234","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}

引用次数: 0

Semitopological Expansion for Link Decomposition Analysis 链路分解分析的半拓扑扩展

IF 2 3区计算机科学

IEEE Transactions on Electromagnetic Compatibility Pub Date : 2024-10-29 DOI: 10.1109/TEMC.2024.3463398

Wenzhi Wang;Xiaoning Ye

引用次数: 0

IEEE Open Access Publishing IEEE 开放存取出版

IF 2 3区计算机科学

IEEE Transactions on Electromagnetic Compatibility Pub Date : 2024-10-28 DOI: 10.1109/TEMC.2024.3478149

引用次数: 0