16-10-2012, 02:03 PM
Comparison of FDTD, FEM and MOM techniques
[attachment=36514]
THE application relates specifically to electrically large problems, for instance modeling various types of antennas (but resonant types), such as wire or MPA's on vehicles.
i have no practical experiencing solving any of these techniques, but am looking for a greater understanding as to why any solution technique would be better than another in different applications including the one mentioned above.
are these statements below generally true? (this is currently my line of thinking)
FEM (HFSS) and FDTD(CST) are different solution techniques, one in frequency and one in time, that generally require the same computational power (computer power) to solve problems. Because each of these solutions discretizes the problem and requires a radiation volume, generally their problem sizes are comparable.
MOM (FEKO, IE3D/FIDELITY) for instance, does not require a radiation boundary by imposing certain boundary conditions to the structure in its solution technique. however, because of these imposed boundary conditions this technique is not useful for complex 3-d volumes of non metallic surfaces so on..
i want to conclude that MOM can handle larger electrical problems, compared to FDTD and FEM, given the right set of circumstances (essentially the problem consists of PEC only)
[attachment=36514]
THE application relates specifically to electrically large problems, for instance modeling various types of antennas (but resonant types), such as wire or MPA's on vehicles.
i have no practical experiencing solving any of these techniques, but am looking for a greater understanding as to why any solution technique would be better than another in different applications including the one mentioned above.
are these statements below generally true? (this is currently my line of thinking)
FEM (HFSS) and FDTD(CST) are different solution techniques, one in frequency and one in time, that generally require the same computational power (computer power) to solve problems. Because each of these solutions discretizes the problem and requires a radiation volume, generally their problem sizes are comparable.
MOM (FEKO, IE3D/FIDELITY) for instance, does not require a radiation boundary by imposing certain boundary conditions to the structure in its solution technique. however, because of these imposed boundary conditions this technique is not useful for complex 3-d volumes of non metallic surfaces so on..
i want to conclude that MOM can handle larger electrical problems, compared to FDTD and FEM, given the right set of circumstances (essentially the problem consists of PEC only)