Pub Date : 2026-02-10DOI: 10.1109/JMMCT.2026.3663392
Kirill Zeyde;Mirco Raffetto
In this paper, we present the application of Born approximations for solving problems related to the influence of moving materials on the scattered electromagnetic field within a commercial CAD environment. The study focuses on non-relativistic velocities, which are of significant practical relevance. The integration of the methodology into COMSOL was straightforward and gave significant results. We provide the general formulation of the problem of interest, discuss the relevant electrodynamic conditions, and introduce the Born approximation under these assumptions. A detailed description of the developed procedure workflow is given. The approach is verified through a comparison between simulation results and semi-analytical solutions. The key aspect of this work is that the integration of Born approximations into commercial software offers a powerful and efficient tool for solving electrodynamics problems involving media in motion, especially those with strong practical significance. This is supported by an example of application of the methodology to a case of practical relevance.
{"title":"Application of the Born Approximation for Modeling EM Effects of Moving Materials in COMSOL Multiphysics","authors":"Kirill Zeyde;Mirco Raffetto","doi":"10.1109/JMMCT.2026.3663392","DOIUrl":"https://doi.org/10.1109/JMMCT.2026.3663392","url":null,"abstract":"In this paper, we present the application of Born approximations for solving problems related to the influence of moving materials on the scattered electromagnetic field within a commercial CAD environment. The study focuses on non-relativistic velocities, which are of significant practical relevance. The integration of the methodology into COMSOL was straightforward and gave significant results. We provide the general formulation of the problem of interest, discuss the relevant electrodynamic conditions, and introduce the Born approximation under these assumptions. A detailed description of the developed procedure workflow is given. The approach is verified through a comparison between simulation results and semi-analytical solutions. The key aspect of this work is that the integration of Born approximations into commercial software offers a powerful and efficient tool for solving electrodynamics problems involving media in motion, especially those with strong practical significance. This is supported by an example of application of the methodology to a case of practical relevance.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"11 ","pages":"125-134"},"PeriodicalIF":1.5,"publicationDate":"2026-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147299631","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 : 2026-01-19DOI: 10.1109/JMMCT.2026.3655145
Srikumar Sandeep;Gabriele Gradoni
This paper presents an efficient semi-analytical method for computing the electromagnetic field scattered by multiple infinitely long, perfectly electrically conducting (PEC) cylinders distributed at arbitrary locations and excited by either a plane wave or electric line sources. The proposed approach leverages the cylindrical wave expansion of electromagnetic fields combined with the translation-addition theorem of the Bessel and Hankel functions to rigorously account for multiple scattering interactions. The method exhibits high numerical stability and computational efficiency, making it suitable for large-scale configurations and Monte-Carlo simulations. The proposed method is validated against full-wave simulations, demonstrating excellent agreement and significant computational advantages.We utilize the developed method to investigate in detail the statistics of the field scattered by random collection of cylinders, whose positions are distributed as per a Poisson point process. The scattered electric field's real and imaginary parts follow a jointly Gaussian distribution. The variation of the statistical parameters as a function of cylinder radius and incident wave direction is examined. Finally, we apply the formulation to a 3GPP channel communication problem.
{"title":"Statistical Characterization of Electromagnetic Fields Scattered by Poisson Point Process Distributed PEC Cylinders","authors":"Srikumar Sandeep;Gabriele Gradoni","doi":"10.1109/JMMCT.2026.3655145","DOIUrl":"https://doi.org/10.1109/JMMCT.2026.3655145","url":null,"abstract":"This paper presents an efficient semi-analytical method for computing the electromagnetic field scattered by multiple infinitely long, perfectly electrically conducting (PEC) cylinders distributed at arbitrary locations and excited by either a plane wave or electric line sources. The proposed approach leverages the cylindrical wave expansion of electromagnetic fields combined with the translation-addition theorem of the Bessel and Hankel functions to rigorously account for multiple scattering interactions. The method exhibits high numerical stability and computational efficiency, making it suitable for large-scale configurations and Monte-Carlo simulations. The proposed method is validated against full-wave simulations, demonstrating excellent agreement and significant computational advantages.We utilize the developed method to investigate in detail the statistics of the field scattered by random collection of cylinders, whose positions are distributed as per a Poisson point process. The scattered electric field's real and imaginary parts follow a jointly Gaussian distribution. The variation of the statistical parameters as a function of cylinder radius and incident wave direction is examined. Finally, we apply the formulation to a 3GPP channel communication problem.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"11 ","pages":"78-91"},"PeriodicalIF":1.5,"publicationDate":"2026-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146175929","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 : 2026-01-19DOI: 10.1109/JMMCT.2026.3655953
Yuvraj B. Dhanade;Amalendu Patnaik
In addition to enhancing spectral efficiency in wireless communication systems, electromagnetic waves carrying Orbital Angular Momentum (OAM) offer several advantages in high-power microwave applications. Consequently, numerous state-of-the-art OAM generators have been reported, the majority of which are based on dielectric structures. However, in high-power scenarios, such dielectric-based generators are inherently constrained by their limited power-handling capability. To overcome this limitation, this paper presents a simple and effective technique for generating OAM beams using an all-metallic structure suitable for high-power microwave applications. The proposed design is validated through both simulations and experimental characterization of its OAM properties. The contrasting features distinguishing the proposed structure from the existing OAM generators are its high mode purity, simple feeding scheme, and large power handling capability.
{"title":"All-Metallic Orbital Angular Momentum Beam Generator for Future High-Power Microwave Applications","authors":"Yuvraj B. Dhanade;Amalendu Patnaik","doi":"10.1109/JMMCT.2026.3655953","DOIUrl":"https://doi.org/10.1109/JMMCT.2026.3655953","url":null,"abstract":"In addition to enhancing spectral efficiency in wireless communication systems, electromagnetic waves carrying Orbital Angular Momentum (OAM) offer several advantages in high-power microwave applications. Consequently, numerous state-of-the-art OAM generators have been reported, the majority of which are based on dielectric structures. However, in high-power scenarios, such dielectric-based generators are inherently constrained by their limited power-handling capability. To overcome this limitation, this paper presents a simple and effective technique for generating OAM beams using an all-metallic structure suitable for high-power microwave applications. The proposed design is validated through both simulations and experimental characterization of its OAM properties. The contrasting features distinguishing the proposed structure from the existing OAM generators are its high mode purity, simple feeding scheme, and large power handling capability.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"11 ","pages":"92-99"},"PeriodicalIF":1.5,"publicationDate":"2026-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146175845","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 : 2026-01-12DOI: 10.1109/JMMCT.2026.3652725
K. Madhu Kiran;Rohit Dhiman
This paper presents an alternating direction implicit – sampling-biorthogonal time-domain (ADI–SBTD) based formulation, free of the Courant-Friedrichs-Lewy stability condition, for accurate and efficient characterization of the transient analysis of coaxial through-glass vias (C-TGVs). Unlike traditional finite-difference time-domain (FDTD) algorithm, multi-resolution time-domain (MRTD), and sampling biorthogonal time-domain (SBTD) methods, the ADI–SBTD technique retains unconditional stability, thus enabling reliable transient simulations at significantly larger time steps. This leads to a substantial reduction in computational effort without compromising accuracy. The method is exhaustively validated against both the SPICE simulations and the SBTD approach, demonstrating excellent agreement with an average error of less than 1% in the several key performance parameters for examining the transient crosstalk effects in C-TGVs. Comparative studies demonstrate that the ADI-SBTD computational framework achieves accuracy at par with both the SBTD and SPICE-based results, thus confirming its reliability and effectiveness for high-fidelity signal analysis in three-dimensional (3D) integrated systems. Moreover, this approach exhibits superior computational efficiency than the SBTD, thus making it a practical solution for addressing the issues of electromagnetic interference and electromagnetic compatibility in 3D integration.
{"title":"An ADI–SBTD Technique Free of CFL Stability Condition for Transient Analysis of Coaxial–TGVs in 3D Integration","authors":"K. Madhu Kiran;Rohit Dhiman","doi":"10.1109/JMMCT.2026.3652725","DOIUrl":"https://doi.org/10.1109/JMMCT.2026.3652725","url":null,"abstract":"This paper presents an alternating direction implicit – sampling-biorthogonal time-domain (ADI–SBTD) based formulation, free of the Courant-Friedrichs-Lewy stability condition, for accurate and efficient characterization of the transient analysis of coaxial through-glass vias (C-TGVs). Unlike traditional finite-difference time-domain (FDTD) algorithm, multi-resolution time-domain (MRTD), and sampling biorthogonal time-domain (SBTD) methods, the ADI–SBTD technique retains unconditional stability, thus enabling reliable transient simulations at significantly larger time steps. This leads to a substantial reduction in computational effort without compromising accuracy. The method is exhaustively validated against both the SPICE simulations and the SBTD approach, demonstrating excellent agreement with an average error of less than 1% in the several key performance parameters for examining the transient crosstalk effects in C-TGVs. Comparative studies demonstrate that the ADI-SBTD computational framework achieves accuracy at par with both the SBTD and SPICE-based results, thus confirming its reliability and effectiveness for high-fidelity signal analysis in three-dimensional (3D) integrated systems. Moreover, this approach exhibits superior computational efficiency than the SBTD, thus making it a practical solution for addressing the issues of electromagnetic interference and electromagnetic compatibility in 3D integration.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"11 ","pages":"100-112"},"PeriodicalIF":1.5,"publicationDate":"2026-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146175822","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 : 2026-01-12DOI: 10.1109/JMMCT.2026.3652145
Changyou Li;Feiwu He;Jingyi Hao
A highly accurate and computationally efficient large-scale model is proposed here for generalized anisotropic composite. Two dimensional obliquely incident plane wave is considered. Materials in all layers can be lossy or lossless generalized anisotropic. Maxwell's equations are first reformulated to yield a matrix form depending on four unknown transverse field components being tangential to the layer interface. A PQ decomposition of the coefficient matrix produces four eigenvalues which represent the transverse dependence of forward and backward propagating waves along the normal direction of the layer interface. Layer S-matrices are then derived for describing wave propagation from one layer to another. The full S-matrix for the whole composite is produced via cascading the layer S-matrices from the top layer to the bottom one. It relates the incident wave to the transmitted and reflected waves. Reflection and transmission coefficients of co- and cross-polarized waves are then obtained. Perfect electric conductor boundary condition is integrated into the multi-layer composite via modification of layer S-matrix for the first time. Fields in the composite are constructed via layer S-matrices.
{"title":"Modeling of Microwave Propagation Properties of Generalized Anisotropic Composite","authors":"Changyou Li;Feiwu He;Jingyi Hao","doi":"10.1109/JMMCT.2026.3652145","DOIUrl":"https://doi.org/10.1109/JMMCT.2026.3652145","url":null,"abstract":"A highly accurate and computationally efficient large-scale model is proposed here for generalized anisotropic composite. Two dimensional obliquely incident plane wave is considered. Materials in all layers can be lossy or lossless generalized anisotropic. Maxwell's equations are first reformulated to yield a matrix form depending on four unknown transverse field components being tangential to the layer interface. A PQ decomposition of the coefficient matrix produces four eigenvalues which represent the transverse dependence of forward and backward propagating waves along the normal direction of the layer interface. Layer S-matrices are then derived for describing wave propagation from one layer to another. The full S-matrix for the whole composite is produced via cascading the layer S-matrices from the top layer to the bottom one. It relates the incident wave to the transmitted and reflected waves. Reflection and transmission coefficients of co- and cross-polarized waves are then obtained. Perfect electric conductor boundary condition is integrated into the multi-layer composite via modification of layer S-matrix for the first time. Fields in the composite are constructed via layer S-matrices.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"11 ","pages":"68-77"},"PeriodicalIF":1.5,"publicationDate":"2026-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146082142","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 : 2025-12-17DOI: 10.1109/JMMCT.2025.3644832
{"title":"2025 Index IEEE Journal on Multiscale and Multiphysics Computational Techniques Vol. 10","authors":"","doi":"10.1109/JMMCT.2025.3644832","DOIUrl":"https://doi.org/10.1109/JMMCT.2025.3644832","url":null,"abstract":"","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"10 ","pages":"512-526"},"PeriodicalIF":1.5,"publicationDate":"2025-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11302050","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145778290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-11DOI: 10.1109/JMMCT.2025.3643198
Liang Chen;Ming Dong;Ran Zhao;Hakan Bagci
Photocarrier generation rate in optoelectronic materials is often calculated using the Poynting vector in the frequency domain. However, this approach is not accurate in time-domain simulations of photoconductive devices because the instantaneous Poynting vector does not distinguish between power flux densities of optical and low-frequency electromagnetic fields. The latter is generated by photocurrents and is not supposed to contribute to the photocarrier generation since the corresponding photon energy is smaller than the bandgap energy of the optoelectronic material. This work proposes an optical absorption-based model to accurately calculate the generation rate in time-domain simulations. The proposed approach considers the material dispersion near the optical frequency corresponding to the bandgap energy of the optoelectronic material and calculates the instantaneous optical absorption from the polarization current density associated with this dispersion model. Numerical examples show that the proposed method is more accurate than the Poynting vector-based approach in calculating the instantaneous optical absorption. The method is further validated against experimental results via simulations of a photoconductive device, where the Poynting vector-based approach results in divergent carrier densities when the low-frequency fields are strong.
{"title":"Calculation of Photocarrier Generation From Optical Absorption for Time-Domain Simulation of Optoelectronic Devices","authors":"Liang Chen;Ming Dong;Ran Zhao;Hakan Bagci","doi":"10.1109/JMMCT.2025.3643198","DOIUrl":"https://doi.org/10.1109/JMMCT.2025.3643198","url":null,"abstract":"Photocarrier generation rate in optoelectronic materials is often calculated using the Poynting vector in the frequency domain. However, this approach is not accurate in time-domain simulations of photoconductive devices because the instantaneous Poynting vector does not distinguish between power flux densities of optical and low-frequency electromagnetic fields. The latter is generated by photocurrents and is not supposed to contribute to the photocarrier generation since the corresponding photon energy is smaller than the bandgap energy of the optoelectronic material. This work proposes an optical absorption-based model to accurately calculate the generation rate in time-domain simulations. The proposed approach considers the material dispersion near the optical frequency corresponding to the bandgap energy of the optoelectronic material and calculates the instantaneous optical absorption from the polarization current density associated with this dispersion model. Numerical examples show that the proposed method is more accurate than the Poynting vector-based approach in calculating the instantaneous optical absorption. The method is further validated against experimental results via simulations of a photoconductive device, where the Poynting vector-based approach results in divergent carrier densities when the low-frequency fields are strong.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"11 ","pages":"113-124"},"PeriodicalIF":1.5,"publicationDate":"2025-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146175705","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 : 2025-12-10DOI: 10.1109/JMMCT.2025.3642617
Zheyu Luo;Yumao Wu;Ningsheng Xu;Shaozhi Deng
An improved method of moments (MoM) based on the augmented electric-field integral equation (A-EFIE) is proposed for efficient electromagnetic (EM) simulation of multilayer interconnects. The A-EFIE overcomes the low-frequency breakdown problem of the electric-field integral equation (EFIE), meeting the EM simulation requirements for interconnects from DC to sub-THz frequencies. The layered medium Green’s function (LMGF) is integrated into the A-EFIE formulation, extending the proposed method to the electromagnetic simulation of high-density multilayer interconnects embedded in dielectric substrates. This work proposes a novel integration of the LMGF into the A-EFIE formulation for lossy conductors, in which both exterior and interior problems are considered. By accurately characterizing conductor losses and skin effects, the proposed method is well-suited for broadband EM simulation of multilayer interconnects in advanced packaging. Compared with the FEM implementation in the HFSS software, the proposed LMGF-based method eliminates the need for meshing stratified dielectric structures in integrated circuits, achieving at least two orders of magnitude reduction in mesh elements. Numerical examples are conducted on different chip-level multilayer interconnects to validate the effectiveness and efficiencies of the proposed method.
{"title":"An Efficient Electromagnetic Computation Method for High-Density Multilayer Interconnects in Integrated Chips","authors":"Zheyu Luo;Yumao Wu;Ningsheng Xu;Shaozhi Deng","doi":"10.1109/JMMCT.2025.3642617","DOIUrl":"https://doi.org/10.1109/JMMCT.2025.3642617","url":null,"abstract":"An improved method of moments (MoM) based on the augmented electric-field integral equation (A-EFIE) is proposed for efficient electromagnetic (EM) simulation of multilayer interconnects. The A-EFIE overcomes the low-frequency breakdown problem of the electric-field integral equation (EFIE), meeting the EM simulation requirements for interconnects from DC to sub-THz frequencies. The layered medium Green’s function (LMGF) is integrated into the A-EFIE formulation, extending the proposed method to the electromagnetic simulation of high-density multilayer interconnects embedded in dielectric substrates. This work proposes a novel integration of the LMGF into the A-EFIE formulation for lossy conductors, in which both exterior and interior problems are considered. By accurately characterizing conductor losses and skin effects, the proposed method is well-suited for broadband EM simulation of multilayer interconnects in advanced packaging. Compared with the FEM implementation in the HFSS software, the proposed LMGF-based method eliminates the need for meshing stratified dielectric structures in integrated circuits, achieving at least two orders of magnitude reduction in mesh elements. Numerical examples are conducted on different chip-level multilayer interconnects to validate the effectiveness and efficiencies of the proposed method.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"11 ","pages":"55-67"},"PeriodicalIF":1.5,"publicationDate":"2025-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145982206","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 : 2025-12-09DOI: 10.1109/JMMCT.2025.3641976
Yijia Cheng;Yujie Hua;Baiyun Wang;Kang Wang;Wenxuan Tang;Gang Shao;Wei E. I. Sha
Monitoring temperature and pressure in harsh environments is vital for industrial applications. This study presents a comprehensive multiphysics analysis and simulation of wireless passive temperature and pressure sensors, providing a feasible research framework for accurate simulation model development tailored to these devices and applications. The analysis focuses on evaluating the electromagnetic-thermal-mechanical coupling effects and improving the accuracy of sensor modeling under extreme environments. In particular, multiphysics simulations are performed on a pressure sensor that incorporates structural deformations induced by thermal expansion and external pressure. Comparison with available experimental data demonstrates significantly enhanced accuracy compared with conventional simple models, yielding a resonance frequency deviation of 0.32% (vs. 2.65%) and an error in the $S_{11}$ parameter estimation of 13.15% (vs. 101.92%) relative to measurements. These findings underscore the importance of accounting for multiphysics coupling in sensor design and provide insights for performance optimization in harsh environments.
{"title":"Multiphysics Analysis and Simulation of Wireless Passive Temperature and Pressure Sensors for Harsh-Environment Applications","authors":"Yijia Cheng;Yujie Hua;Baiyun Wang;Kang Wang;Wenxuan Tang;Gang Shao;Wei E. I. Sha","doi":"10.1109/JMMCT.2025.3641976","DOIUrl":"https://doi.org/10.1109/JMMCT.2025.3641976","url":null,"abstract":"Monitoring temperature and pressure in harsh environments is vital for industrial applications. This study presents a comprehensive multiphysics analysis and simulation of wireless passive temperature and pressure sensors, providing a feasible research framework for accurate simulation model development tailored to these devices and applications. The analysis focuses on evaluating the electromagnetic-thermal-mechanical coupling effects and improving the accuracy of sensor modeling under extreme environments. In particular, multiphysics simulations are performed on a pressure sensor that incorporates structural deformations induced by thermal expansion and external pressure. Comparison with available experimental data demonstrates significantly enhanced accuracy compared with conventional simple models, yielding a resonance frequency deviation of 0.32% (vs. 2.65%) and an error in the <inline-formula><tex-math>$S_{11}$</tex-math></inline-formula> parameter estimation of 13.15% (vs. 101.92%) relative to measurements. These findings underscore the importance of accounting for multiphysics coupling in sensor design and provide insights for performance optimization in harsh environments.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"11 ","pages":"9-21"},"PeriodicalIF":1.5,"publicationDate":"2025-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145830783","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 : 2025-11-24DOI: 10.1109/JMMCT.2025.3636443
Hongliang Li;Julius Koskela;Balam A. Willemsen;Jackson W. Massey
A hierarchical cascading technique with subpitch finite element decomposition is presented for 2-D modeling of acoustic wave resonators. This technique scans the structure and partitions it into thin slices. Unique unit blocks are identified and computed with the finite element method. The entire geometry is then translated into a sequence of unit blocks, and a hierarchical tree of cascading operations is built. Full solutions are obtained by combining smaller blocks into larger blocks. For the blocks that repeat in the cascading process, the matrix is computed only once and can be reused later. Numerical examples are presented to demonstrate the efficiency of the proposed method with over 70% time cost reduction and decreased memory usage than conventional HCT. Compared with FEM, over 100 times speedup can be achieved.
{"title":"A Hierarchical Cascading Technique With Subpitch Finite Element Decomposition for 2-D Modeling of Acoustic Wave Resonators","authors":"Hongliang Li;Julius Koskela;Balam A. Willemsen;Jackson W. Massey","doi":"10.1109/JMMCT.2025.3636443","DOIUrl":"https://doi.org/10.1109/JMMCT.2025.3636443","url":null,"abstract":"A hierarchical cascading technique with subpitch finite element decomposition is presented for 2-D modeling of acoustic wave resonators. This technique scans the structure and partitions it into thin slices. Unique unit blocks are identified and computed with the finite element method. The entire geometry is then translated into a sequence of unit blocks, and a hierarchical tree of cascading operations is built. Full solutions are obtained by combining smaller blocks into larger blocks. For the blocks that repeat in the cascading process, the matrix is computed only once and can be reused later. Numerical examples are presented to demonstrate the efficiency of the proposed method with over 70% time cost reduction and decreased memory usage than conventional HCT. Compared with FEM, over 100 times speedup can be achieved.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"11 ","pages":"47-54"},"PeriodicalIF":1.5,"publicationDate":"2025-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145982361","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}
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