IEEE Journal on Multiscale and Multiphysics Computational Techniques最新文献_第2页

Analysis of the Near Field by the Fast Physical Optics Method With the Adaptive Mesh Technique 基于自适应网格技术的快速物理光学近场分析

IF 1.5

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2026-01-01 Epub Date: 2026-03-16 DOI: 10.1109/JMMCT.2026.3674669

Si Jia Guo;Yu Mao Wu;Li-Xin Guo

{"title":"Analysis of the Near Field by the Fast Physical Optics Method With the Adaptive Mesh Technique","authors":"Si Jia Guo;Yu Mao Wu;Li-Xin Guo","doi":"10.1109/JMMCT.2026.3674669","DOIUrl":"https://doi.org/10.1109/JMMCT.2026.3674669","url":null,"abstract":"In this work, physical optics (PO) scattered near fields of electrically large target under different excitation sources are calculated by the linear amplitude-based fast physical optics method combined with the adaptive mesh technique (ALFPO). A key innovation is the derivation of phase gradient-based adaptive sampling interval formulas for quadratic patches, applicable to calculation of scattered near and far fields, which addresses the over-sampling issue in PO method. Also, adaptive mesh distribution generated via the phase gradient and local error of scattered field is analyzed in view of high-frequency wave physics. Moreover, the edge grid segmentation (EGS) approach is proposed to smoothen shadowed boundaries, ensuring the more accurate lit region data for calculation. Numerical results demonstrate that both the phase gradient-based ALFPO (PG-ALFPO) and scattered field error-based ALFPO (FE-ALFPO) outperform the linear amplitude-based fast physical optics (LFPO) method and FEKO software. They reduce the number of patches by one or two orders of magnitude while maintaining accuracy. Notably, the PG-ALFPO directly reflects high-frequency physical mechanisms. Both ALFPO methods achieve memory savings at the cost of CPU time, with PG-ALFPO exhibiting nearly twice the efficiency of FE-ALFPO. In short, the ALFPO methods along with EGS approach provide a significant way to solve near-field scattering features of electrically large target.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"11 ","pages":"146-155"},"PeriodicalIF":1.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147665505","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

Regularization-Augmented Physics-Informed Neural Networks for Electromagnetic Inverse Scattering 电磁逆散射的正则化增强物理信息神经网络

IF 2.1

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2026-01-01 Epub Date: 2026-06-15 DOI: 10.1109/JMMCT.2026.3703705

Zengkai Wu;Kaikun Niu;Sheng Sun;Ping Li

{"title":"Regularization-Augmented Physics-Informed Neural Networks for Electromagnetic Inverse Scattering","authors":"Zengkai Wu;Kaikun Niu;Sheng Sun;Ping Li","doi":"10.1109/JMMCT.2026.3703705","DOIUrl":"https://doi.org/10.1109/JMMCT.2026.3703705","url":null,"abstract":"This paper proposes a regularization-augmented physics-informed neural network (RAPINN) framework based on the volume integral equation (VIE) for electromagnetic inverse scattering problems. By incorporating the VIE, the scattered field is evaluated through the Green’s function, allowing the neural networks to reconstruct the total field only inside the domain of interest and reducing the computational burden for far-field problems. To avoid repeated forward solves, the inverse problem is reformulated as an optimal-control-inspired physics-constrained optimization problem. For each inverse problem, a complex-valued field module and a real-valued contrast module are jointly optimized through the data-equation and state-equation residuals, replacing explicit matrix inversion with residual-based optimization. The resulting vanilla PINN framework achieves accuracy comparable to NN-based inversion with lower computational cost. To improve robustness in challenging cases, squared total-variation-like (squared TV) smoothness regularization and Tikhonov regularization are further incorporated into the PINN loss to form RAPINN. By introducing prior information on the scatterer, these explicit regularization terms complement the implicit constraints imposed by the physics residuals and help mitigate unstable reconstructions produced by the vanilla PINN in high-contrast and noisy scenarios. Numerical results show that RAPINN provides more stable and accurate reconstructions than conventional methods and vanilla PINN in the tested cases.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"11 ","pages":"360-370"},"PeriodicalIF":2.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148443282","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

Wind-Induced Phase Perturbation Analysis in UAV-Towed VLF Distributed Transmitting Arrays: A Multiphysics and Monte Carlo Approach 无人机拖曳VLF分布式发射阵列的风致相位摄动分析：多物理场和蒙特卡罗方法

IF 2.1

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2026-01-01 Epub Date: 2026-09-15 DOI: 10.1109/JMMCT.2026.3733854

Hai-tao Chen;Long-jun Zhou;Gao-zhan Peng

{"title":"Wind-Induced Phase Perturbation Analysis in UAV-Towed VLF Distributed Transmitting Arrays: A Multiphysics and Monte Carlo Approach","authors":"Hai-tao Chen;Long-jun Zhou;Gao-zhan Peng","doi":"10.1109/JMMCT.2026.3733854","DOIUrl":"https://doi.org/10.1109/JMMCT.2026.3733854","url":null,"abstract":"This paper investigates wind-induced electromagnetic perturbations in uncrewed aerial vehicle (UAV)-towed very-low-frequency (VLF) distributed transmitting arrays. A multiphysics framework couples a lumped-mass cable-dynamics model, a curved-wire Method of Moments (MoM) solver, and spatially correlated Monte Carlo analysis. Wind-deformed cable geometries are transferred directly to the electromagnetic model to obtain the input impedance and feed-current-normalized complex radiation response. The element phase perturbation is separated into detuning-induced feed-current phase and deformation-induced radiation phase in a prescribed direction. The dynamic model is assessed by numerical convergence and comparison with published flight-test data, and the electromagnetic model is verified against full-wave FEKO calculations. For a 1500-m antenna at 24 kHz, the passive-drift mode is markedly more wind sensitive than the station-keeping mode; at 10 m/s in the wind-aligned direction, the total phase perturbation is −64.36° and −19.11°, respectively. For a 16-element 2-by-8 array with turbulence intensity 0.20 and a 6-km spatial correlation length, the mean normalized desired-direction radiation-response metric is −1.07 dB for station keeping at 10 m/s, but decreases to −6.16 dB at 8 m/s and −11.52 dB at 10 m/s for passive drift. Spatial wind correlation has limited influence on the mean response but more strongly affects the distribution tails. These results quantify the propagation of wind-induced structural deformation into element complex response and distributed-array performance.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"11 ","pages":"543-556"},"PeriodicalIF":2.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149188543","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

An Efficient Field-Wire-Circuit Co-Simulation for Twisted-Wire Pairs in Complex Environment 复杂环境下双绞线对的高效场-线-电联合仿真

IF 1.5

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2026-01-01 Epub Date: 2026-03-14 DOI: 10.1109/JMMCT.2026.3692231

Ying Wang;Jian Wang;Zhao-Yang Liu;Xue-Song Meng;Wen-Yan Yin

{"title":"An Efficient Field-Wire-Circuit Co-Simulation for Twisted-Wire Pairs in Complex Environment","authors":"Ying Wang;Jian Wang;Zhao-Yang Liu;Xue-Song Meng;Wen-Yan Yin","doi":"10.1109/JMMCT.2026.3692231","DOIUrl":"https://doi.org/10.1109/JMMCT.2026.3692231","url":null,"abstract":"In this paper, the terminal responses of twisted-wire pairs (TWPs) in complex platforms are obtained using field-wire-circuit co-simulation approach for multiscale electromagnetic analysis. The proposed method mainly combines the three-dimensional (3D) full-wave conformal finite-difference time-domain (CFDTD) method, the one-dimensional (1D) FDTD scheme for transmission line equations, and the state variable method for arbitrary terminals. First, the 3D full-wave FDTD combined with metallic conformal method is employed to compute the electromagnetic fields in PEC shielding cavities or automotive environments, where the magnetic-field updating equations on edge grids adjacent to metallic boundaries are modified. Then, a high-precision interpolation algorithm is used to obtain the electric-field components required for constructing the equivalent distributed sources along the TWPs, while the cables are not explicitly included in the full-wave simulation. Last, 1D FDTD method is applied to calculate the voltages and currents along the TWPs, and the terminal responses are solved together with the state variable representation of the terminal circuits. The proposed hybrid FDTD method naturally integrates the interactions among electromagnetic fields, cables, and terminal circuits. Numerical examples demonstrate that the results obtained by the proposed approach agree well with those from 3D full-wave simulations and CST Cable Studio co-simulation, confirming the accuracy and reliability of the proposed method. Moreover, the proposed hybrid method can apply larger mesh size to correctly calculate the terminal response of the TWPs, and the simulation time is greatly reduced.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"11 ","pages":"258-268"},"PeriodicalIF":1.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148171597","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

A Full-Wave Electromagnetic Modeling of a Self-Sustained High-Power Plasma Limiter 自维持高功率等离子体限制器的全波电磁建模

IF 1.5

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2026-01-01 Epub Date: 2026-03-12 DOI: 10.1109/JMMCT.2026.3692614

Camille E. Williams;Sandeep Narasapura Ramesh;Abbas Semnani;Vadim V. Yakovlev

{"title":"A Full-Wave Electromagnetic Modeling of a Self-Sustained High-Power Plasma Limiter","authors":"Camille E. Williams;Sandeep Narasapura Ramesh;Abbas Semnani;Vadim V. Yakovlev","doi":"10.1109/JMMCT.2026.3692614","DOIUrl":"https://doi.org/10.1109/JMMCT.2026.3692614","url":null,"abstract":"Computer models can benefit the development of devices containing microwave plasma by clarifying the physical processes of the relevant system. Traditional multiphysics modeling is of limited help due to complex methodology, ambiguous interpretation of the results, and excessive computational resources. However, modeling the electromagnetic processes responsible for initiating and maintaining the plasma can be of great importance. Recently, a key step in developing this approach was made, linking modeling parameters of the plasma with operational parameters of the system, such as power, type of gas, and pressure. In this paper, we present an experimental verification of this approach for a previously developed high-power plasma limiter. In a Finite-Difference Time Domain (FDTD) model of the device, the plasma is characterized by the plasma frequency, which is defined via an established relationship between electron density and power; and the collision frequency, which is calculated for a given gas and pressure inside the plasma cell. A small discrepancy between the measured and simulated transmission coefficients is attributed to uncertainty in the model input data, which inherits any uncertainty in the conditions of the experiment. The presented simulation results, not readily obtained using other multiphysics tools, provide additional insight into the behavior and functionality of the power limiter. It is suggested, based on the results of this endeavor, that FDTD simulations combined with the proposed plasma modeling approach may serve as a practical and informative tool for the analysis and design of microwave plasma devices.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"11 ","pages":"276-285"},"PeriodicalIF":1.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148171693","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

An Analytical-Computational Framework for Electromagnetic Scattering by a Buried Anisotropic Gyrotropic-Coated Conducting Sphere 埋藏各向异性回电包覆导电球电磁散射的解析-计算框架

IF 1.5

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2026-01-01 Epub Date: 2026-04-22 DOI: 10.1109/JMMCT.2026.3686473

Xinchen Liu;Youlin Geng

{"title":"An Analytical-Computational Framework for Electromagnetic Scattering by a Buried Anisotropic Gyrotropic-Coated Conducting Sphere","authors":"Xinchen Liu;Youlin Geng","doi":"10.1109/JMMCT.2026.3686473","DOIUrl":"https://doi.org/10.1109/JMMCT.2026.3686473","url":null,"abstract":"By combining the addition theorem of spherical vector wave functions (SVWFs), the image method, the T-matrix method, and the recursive algorithm, this paper develops an efficient analytical-computational framework for electromagnetic scattering by a buried anisotropic gyrotropic-coated conducting sphere. The transmitted electromagnetic field from a vertically incident wave acts as the initial excitation for the buried object and is expanded using the SVWFs. By applying the boundary conditions, the scattered fields of the anisotropic gyrotropic-coated conducting sphere are obtained and further interact with the ground. The multiple reflections between the buried object and the ground are modeled through the image method and the addition theorem of SVWFs in an iterative framework until the field on the ground converges. Unlike previous studies focusing on single-point evaluation, the proposed method analyzes the field distribution over the entire ground plane. Numerical results are presented and show excellent agreement with the FEKO simulations, thereby validating the accuracy and robustness of the proposed framework.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"11 ","pages":"237-245"},"PeriodicalIF":1.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148003541","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

A Segmented Multiphysics FEM–FRVF Reduced-Order Method for Soil-Ionization Transients in Complex Grounding Electrodes 复杂接地电极中土壤电离瞬态的分段多物理场FEM-FRVF降阶方法

IF 2.1

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2026-01-01 Epub Date: 2026-07-13 DOI: 10.1109/JMMCT.2026.3712367

Fubao Xiao;Yan Li;Xiaolan Li;Ju Tang;Jiuchang Zhang;Tianqi Xu

{"title":"A Segmented Multiphysics FEM–FRVF Reduced-Order Method for Soil-Ionization Transients in Complex Grounding Electrodes","authors":"Fubao Xiao;Yan Li;Xiaolan Li;Ju Tang;Jiuchang Zhang;Tianqi Xu","doi":"10.1109/JMMCT.2026.3712367","DOIUrl":"https://doi.org/10.1109/JMMCT.2026.3712367","url":null,"abstract":"Blasting-formed deep-well grounding electrodes use a spherical terminal and radial tips to improve lightning-current dissipation in high-resistivity regions. The associated field enhancement and soil ionization create strongly localized nonlinearities that require fine three-dimensional finite-element meshes, making full-window simulation expensive. This paper develops a complex deep-well grounding model and a segmented FEM–FRVF reduced-order framework. A multiphysics FEM resolves the early nonlinear electromagnetic and soil-ionization response, after which an FRVF reduced-order model derived from the frozen broadband port response continues the transient through a continuous state handover. For the reference-electrode case, the mean and maximum relative errors over 3.00–9.90 <inline-formula><tex-math>$mu mathrm{s}$</tex-math></inline-formula> are 1.38% and 3.65%, respectively. For the complex-terminal case, the corresponding impedance errors over 2–10 <inline-formula><tex-math>$mu mathrm{s}$</tex-math></inline-formula> are 1.21% and 1.90%, and the total computational time decreases from approximately <inline-formula><tex-math>${text{5.5}};text{h}$</tex-math></inline-formula> to <inline-formula><tex-math>${text{1.50}};text{h}$</tex-math></inline-formula>. Sensitivity and multi-tip studies further quantify the effects of the switching instant, ROM order, front-end discretization, and terminal geometry.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"11 ","pages":"470-480"},"PeriodicalIF":2.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148925342","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

Inverse Topology Design Method for Ultra-Wideband Compact Frequency Selective Surface Structures 超宽带紧凑选频表面结构的逆拓扑设计方法

IF 2.1

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2026-01-01 Epub Date: 2026-08-27 DOI: 10.1109/JMMCT.2026.3728455

Zhao-Qing Xu;Li-Ye Xiao;Haiyan Ou;Wei Shao

引用次数: 0

Zonal Partitioning Design of a Hemispherical Frequency-Selective Radome 半球形选频天线罩的分区设计

IF 2.1

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2026-01-01 Epub Date: 2026-10-05 DOI: 10.1109/JMMCT.2026.3740300

Kai Wang;Wei Shao;Fu-Long Jin;Lin Peng;Li-Ye Xiao

{"title":"Zonal Partitioning Design of a Hemispherical Frequency-Selective Radome","authors":"Kai Wang;Wei Shao;Fu-Long Jin;Lin Peng;Li-Ye Xiao","doi":"10.1109/JMMCT.2026.3740300","DOIUrl":"https://doi.org/10.1109/JMMCT.2026.3740300","url":null,"abstract":"In this communication, an efficient design for a hemispherical radome using zonal partitioning is proposed. The design incorporates a frequency selective surface (FSS) based on three-legged units that are arranged in a partitioned configuration. Thus, the varying incident angles of electromagnetic waves radiating from the internal antenna to the hemispherical radome surface are fully accounted for. The three-legged FSS units were distributed across 16 zones in which their leg lengths and rotation angles are optimized to achieve the desired performance characteristics. With a horn antenna, radiation performance was evaluated with the results with and without zonal partitioning. The partitioned radome increased the simulated main lobe gain by 3.74 dB and the measured one by 4.03 dB compared with the radome composed of uniform FSS units, significantly improving the radiation performance. Furthermore, when the horn antenna was rotated to a beam steering angle of -30°, it was found that the main lobe still increased by 2.07 dB. This partitioned radome can be used to protect the internal antennas while maintaining good radiation performance.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"11 ","pages":"557-562"},"PeriodicalIF":2.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149188184","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

Low Complexity Full-Wave Stochastic Analysis for Spatial Dielectric Variations 空间介电变化的低复杂度全波随机分析

IF 1.5

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2026-01-01 Epub Date: 2026-04-13 DOI: 10.1109/JMMCT.2026.3681845

Abhijith B. Narendranath;Kiran Ravindran;Kalarickaparambil Joseph Vinoy

引用次数: 0