ansoft fdtd

No.

hi there are sites www.remcom.com,
www.zeland.com,
www.aplac.com
i think ansoft based on finite element method
regards

one of the best (maybe best) fdtd codes are CST products, for example cst microwave studi, take a look at:
www.cst.com

marti

another ones
Quickwave 3D ( www.qwed.com.pl ) with Conformal FDTD
SEMCAD ( www.semcad.com )

in my opinion CST - MWS rulez

Hi svarun


there is something call TDR (time domain reflectometry) you can use it
to see the behavior of your device in time

PL

Ansoft EM simulators (HFSS, Maxwell) are based on FEM or (Designer/Ensemble) MoM.

Regards.

Can anyone post a feedback regarding the product "Empire" from www.empire.de.This is an FDTD based EM simulator and it claims to handle a wide range of structures.We are considering buying an FDTD based EM simulation package.Which in your opinion is the best ? All replies are most welcome.

-Warm regards
-svarun

Empire - not recommended...
Too unfriendly and only staircase approximation!!!

BUY MWS!!!

as it was proved, the best method for analysing Microstrip P@tch Antennas is MoM method, and the best code here is 1E3D, however, i (and one of my friends ;) ) used C$T Microwave Studio to analyse a complex fractal shaped p@tch antenna, with a thick airgap and some sort of complex feeding (L-shaped probe) with both codes (1E3D and MW$). the results were in very well agreement. C$T MW$ has a very powerfull built in graphic interface based on mechanical modeling softwares (its like s0lidw0rks), a very good automatic mesh generator (with multi submesh), and new bounderies and methods (conformal). i strongely recommend C$T MW$, as eirp did.

rgrds, marti

Hi all,
We have bought a moment based software - IE3D . We would like to purchase a FDTD based software as there is some research going on in FDTD method for certain structures in our lab. On what technique is C$T-MWS based on.I heard it is based on the FIT technique ( Finite Integration Technique) .Is this true ? Kindly do clarify.

-Warm Regards
-svarun

why u not purchase xfdtd from www.remcom.com,i think it has very large and active em simulator bu i think it higher price

FIT and FDTD are very similar. Where FDTD uses finite differences to approximate the curls of the differential form of Maxwell's Equations, FIT approximates the integrals of the integral form of Maxwell's Equations. Since both assume a linear field between points, they usually produce the same update equations. They differ on how they treat boundaries, the FIT proponents claim that FIT handles boundaries more accurately than FDTD. (I have never written an FIT code so I can't substantiate this claim.)

of course not.XFDTD is maybe the product of FDTD