Background
In the frame of R&D ONERA internal project, PAME, aims at federating Integral Equation Methods
and high frequency asymptotic methods, the federation of asymptotic methods is achieved in a
software product called FERMAT within ONERA and is a dual development between ONERA and OKTAL-SE.
More details can be found as well on the ONERA specific site:
FERMAT
FERMAT represents n exemplary partnership between industrial & research entities:
- ONERA/DEMR
Electromagnetic models
Material databases
Expertise especially in RADAR processing
- OKTAL-SE
Geometrical 3D databases
Ray tracing technique
Software development
- AD2M Laboratory (Toulouse University)
Theory
Research team (ECREM)
Teaching & thesis
Projects objectives
The scientific ambition of FERMAT project is to provide a software EM simulation tool, based on
the association of asymptotic formulations of Maxwell’s equations and shooting and bouncing rays
technique, that allows one :
Obj1: To compute Near field or far field high frequency scattering from metallic or dielectric materials including reflection, transmission or diffraction of electromagnetic wave.
Obj2: To compute the EM interactions with targets and the environment in the same way.
Obj3: To take into account the statistical surface roughness (natural or artificial).
Achievements
EM models validated by ONERA in the frame of international workshops and working groups.
Very low computation times, even for very complex scenes, including very complex objects, described by several millions polygons CAD models.
Calculation time nearly independent of the number of polygons.
Unified approach for 3D targets and the environment.
Handles the target / environment coupling effects
Unified calculation method for near and far fields
Can take Doppler effects into account.
Number of rays optimized using « adaptive antialiasing ».
Can compute dielectric objects, including diffraction by their edges.
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