UGRFDTD (DOWNLOAD A SHORT PRESENTATION) is a state-of-the-art parallel FDTD simulator (partially developed under the HIRF-SE European 7PM project with contributions from EADS-CASA.

It is a general-purpose time-domain simulator, specially suited to deal with HIRF, Lightning, NEMP... electrically-large EMC problems involving complex structures, complex materials and cables.

It supports input files based both on a native ASCII input and on a HDF format using the open standard AMELET-HDF.

At this moment UGRFDTD employs tools developed under HIRF-SE to clean, mesh and assign the electromagnetic properties to the problem under solution.

There are currently two versions of the UGRFDTD program: FULL and LITE. The LITE version supports all features developed by the UGR (with a current limit of 256 Mcells problem):

  1. Cluster working capabilites through MPI.
  2. Multiple threads per processor through OpenMP.
  3. Closed/symmetric problems by means of PEC and PMC conditions.
  4. Open problems by means of PML boundary conditions (CPML formulation) or by Mur ABCs.
  5. Non-uniformly meshed domains by means of mesh-grading techniques.
  6. Bulk lossless and lossy dielectrics.
  7. Dielectrics with frequency dependent relative permittivity and/or permeability, with an arbitrary number of complex-conjugate pole-residue pairs.
  8. Bulk anisotropic lossless and lossy dielectrics.
  9. Branched multiwires aligned with the Cartesian grid
    - Junctions of wires of different radii.
    - Junctions of multiwires
    - Wire bundles
    - Loaded with p.u.l resistance and inductance wires
    - Grounding through lumped elements 
  10. Plane wave illumination with arbitrary time variation.
  11. Hertztian dipole sources
  12. Equivalent Huygens surfaces
  13. Low frequency thin composites and lossy surfaces 
  14. Thin slots.
  15. Time, frequency and transfer function probes 
  16. Time animations in volumes through Paraview
  17. Near-to-far field transformation.

The FULL version can simulate problems over 256 Mcells, and permits  the treatment of anisotropic multilayered composites (including penetration effects) by making use of either

    1. Material Impedance Boundary conditions by the University of Rome by Prof. M. Sabrina Sarto. (SAPIENZAMIBC).
    2. Digital Filter equivalent model by the University of York by Prof. Ian Flintoft (YORKDIGFILT)
  • The UGRFDTD LITE version can be downloaded by HIRF-SE partners during the project duration just by registering and accessing the download area.
  • The FULL version (excluding SAPIENZAMIBC and YORKDIGFILT) can also be downloaded there just by signing a PDF version of the EULA (see info) and sending it by email to
  • The YORKDIGFILT module is included in the FULL version (signing a specific EULA (see info) and sending it by email to
  • The SAPIENZAMIBC module will be available soon (a specific EULA is in the way).