semba-fdtd

In a nutshell, semba-fdtd capabilities are

• Cluster working capabilites through MPI.

• Multiple threads per processor through OpenMP.

• Closed/symmetric problems by means of PEC and PMC conditions.

• Open problems by means of PML boundary conditions (CPML formulation) or by Mur ABCs.

• Non-uniformly meshed domains by means of rectilinear (or graded) meshes.

• Bulk lossless and lossy dielectrics.

• Materials with frequency dependent relative permittivity and/or permeability, with an arbitrary number of complex-conjugate pole-residue pairs.

• Bulk anisotropic lossless and lossy dielectrics.

• Equivalent models of multilayered skin-depth materials.

• Branched multiwires.

• Multiconductor transmission lines networks embedded within 3D FDTD solvers.

• Coupling with SPICE solvers (ngspice).

• Junctions of wires of different radii.

  1. Junctions of multiwires.
  2. Wire bundles.
  3. Loaded with p.u.l resistance and inductance wires.
  4. Grounding through lumped elements.

• Plane-wave illumination with arbitrary time variation.

• Multiple planewaves illumination for reverberation chamber modeling.

• Hertzian dipole sources.

• Equivalent Huygens surfaces.

• Low frequency thin composites and lossy surfaces.

• Thin slots.

• Time, frequency and transfer function probes.

• Near-to-far field transformation.

Usage

Compilation and debugging instructions can be found here.

A short tutorial on usage can be found here.

The main binary is semba-fdtd which uses the .fdtd.json format, described here, as input files. It can be run with

  semba-fdtd -i CASE_NAME.fdtd.json

Tests must be run from the root folder. python wrapper test assumes that semba-fdtd has been compiled successfully and is located in folder build/bin/. For intel compilation it also assumes that the intel runtime libraries are accessible.

License

This code is licensed under the terms of the MIT License. All rights reserved by the University of Granada (Spain)

Funding

This repository has been funded by the following grants:

• Spanish Ministry of Science and Innovation (MICIN/AEI) (Grant Number: PID2022-137495OB-C31)
• European Union, HECATE project. (HE-HORIZON-JU-Clean-Aviation-2022-01)
• iSense Project. In-Situ Monitoring of Electromagnetic Interference. (HE-HORIZON-MSCA-2023-DN-01)