https://hdl.handle.net/10481/35403 2026-04-18T18:52:24Z https://hdl.handle.net/10481/95762 OpenSEMBA/DGTD: An Open-Source Full-Wave Maxwell’s Equations Solver Amador, Farah; Díaz Angulo, Luis Manuel; Muñoz Manterola, Alejandro; Gascón Bravo, Alberto; Tekbas, Kenan; González García, Salvador Numerical solvers have been essential tools in the industry, R&D and other similar fields in the last two decades. While it is important to understand the advantages and limitations of most common methods and look for the best candidates in terms of simplicity, accuracy, and computational performance; the capacity to be able to simulate, with relative simplicity, complex physical problems and obtain results which can serve as validations or preliminary testing has increased efforts towards obtaining more efficient and stable methods. In this work, we will discuss our choice to utilize the discontinuous Galerkin in the time domain (DGTD) method by extending an available finite element method library, MFEM, which allows us to introduce a Maxwell's equations solver in all dimensions without having to implement the basic framework a numerical method would require. A basic form of a DGTD solver has been successfully implemented, with further development planned in the future. https://hdl.handle.net/10481/92084 Electromagnetismo computacional en la universidad española Rius, Juan Manuel; Boix, R.; Cátedra, F.; Córcoles, J.; García-Castillo, L. E.; Gimeno, B.; Medina, F.; Quesada, F.; Rubio, J.; Rubio, A.; Taboada, J.M.; Vico, F. Desde sus inicios hace 40 años se lleva desarrollando en España una intensa actividad en el campo del electromagnetismo computacional. Varios grupos punteros a nivel internacional han creado nuevos métodos y algoritmos, con una importante transferencia de tecnología a empresas líderes, así como desarrollo de software comercial. En este artículo se introducen las principales aplicaciones de esta actividad en temas relacionados con las comunicaciones (antenas, microondas y radar) y los problemas multi-físicos. https://hdl.handle.net/10481/92063 A HIE S-FDTD method to account for geometrical and material uncertainties in lossy thin panels Ruiz Cabello, Miguel; Díaz Angulo, Luis Manuel; Gascón Bravo, Alberto; Prados, A.; Gutierrez Gutierrez, Guadalupe; Pascual Gil, Enrique; Gónzalez Atienza, Míriam https://hdl.handle.net/10481/92062 FDTD Voxels-in-Cell method with Debye media Tekbas, Kenan; Berenger, Jean-Pierre; Díaz Angulo, Luis Manuel; Ruiz-Cabello Núñez, Miguel David; González García, Salvador The Voxels-in-Cell (VIC) method was recently introduced for reducing the computational cost of the finitedifference time-domain (FDTD) method with objects composed with dielectric voxels. It relies on using a FDTD cell larger than the voxels, with eight or more voxels in each VIC cell. With the objective of using it in bio-electromagnetics applications, this paper extends the VIC method to voxels filled with Debye media. Beside the theory and the algorithm of the extended VIC method, several numerical experiments are reported with a canonical object and with human body phantoms composed with voxels. The experiments show that the accuracy of the method is preserved while large reductions of the computational requirements can be achieved, especially the computational time can be reduced by about one order of magnitude. https://hdl.handle.net/10481/92056 Impedance Modeling of Common Mode Ferrite Chokes Using Transmission Line Theory Muñoz Manterola, Alejandro; Díaz Angulo, Luis Manuel; Gascón Bravo, Alberto; Tekbaş, Kenan; Tijero, María; Moreno, Roberto; González García, Salvador An impedance model, based on transmission line (TL) theory, is introduced for common mode ferrite chokes. The proposed model takes into account the geometrical properties of the choke, the distribution of electromagnetic fields within the core material and the impact of the measurement setup. The validity of the model was tested through numerical simulations. As a practical application, the model was applied to estimate the complex permeability of MnZn and NiZn cores from impedance measurements, resulting in a range of values compatible with those reported in other works.