prnc
Joined: 18 Jun 2008
Posts: 2
|
 23 Jun 2008 7:52 FEKO demo video |
|
|
|
The name FEKO is an abbreviation derived from the German phrase FEldberechnung
bei K¨orpern mit beliebiger Oberfl¨ache. (Field computations involving bodies of arbitrary
shape.) As the name suggests, FEKO can be used for various types of electromagnetic
field analyses involving objects of arbitrary shapes.
Changes to the functionality of the code in this release with respect to the previous one
of December 2005 (Suite 5.1) are indicated as follows:
Sections that have changed from those in the previous version of the manual.
Sections that were newly added to this version of the manual.
FEKO Overview
The core of the program FEKO is based on the Method of Moments (MoM). Electromagnetic
fields are obtained by first calculating the electric surface currents on conducting
surfaces and equivalent electric and magnetic surface currents on surface of dielectric
solids. The currents are calculated using a linear combination of basis functions, where
the coefficients are obtained by solving a system of linear equations. Once the current
distribution is known, further parameters such as the near field, the far field, scattering,
directivity or the input impedance of antennas can be obtained.
Electrically large problems are usually solved with either the Physical Optics (PO) approximation
and its extensions or the Uniform Theory of Diffraction (UTD). In FEKO
these formulations are hybridised with the MoM at the level of the interaction matrix.1
This is a major step in addressing the problem of solving electromagnetic problems where
the object under consideration is too large (in terms of wavelengths) to solve with the
MoM but too small to apply only the asymptotic UTD approximation with high accuracy.
With the hybrid MoM/PO or hybrid MoM/UTD techniques, critical regions of the
structure can be considered using the MoM and the remaining regions (usually larger,
flat or curved metallic surfaces) using the PO approximation or UTD.
In addition to these PO and UTD high frequency techniques, a fast integral equation solver
— the Multilevel Fast Multipole Method (MLFMM) — has been included since FEKO
Suite 4.2. As compared to the MoM, this drastically reduces the memory requirement and
CPU-time, and as compared to the PO / UTD asymptotic techniques, it is a rigorous
technique not based on specific high frequency approximations (which in the case of
UTD are for instance only available for certain canonical objects limiting the range of
applicability).
Added after 1 minutes:
You can also go to this website to see more details.
http://www.feko.info
|
|
