Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

What is the best 3D Field solver tools

Status
Not open for further replies.

colin_cheng

Newbie level 6
Joined
Jun 18, 2002
Messages
13
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
76
3d field solver

Dear Friend

What is the best 3D Field solver tools ?
Could you give me any comment ?
 

zgx

Member level 1
Joined
Feb 25, 2002
Messages
38
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,286
Activity points
162
solving radiation problem 3d fem

In general, It is well known ansofthfss and cstmws are two great 3D sover. cstmws is more easy to build model.
 

yingyang

Full Member level 2
Joined
Dec 26, 2002
Messages
126
Helped
2
Reputation
4
Reaction score
2
Trophy points
1,298
Activity points
862
empire

There is no good solver as it is highly dependent on the type of problem you are solving.....


For example, the use of HFSS in analyzing CPW structure may not be very fruitful as it is very time-consuming......


Perhaps, em guru may like to add a few words on this???
 

div

Member level 3
Joined
Jun 17, 2002
Messages
59
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,286
Activity points
611
2.5d field solver

Hi:

Actually, the kernel of the solver depends on
the Partial Differential Equation (PDE) solver.

As you all know, Maxwell Equation is the PDE
to be solved in all these EM simulator.
To compare the EM solver is basically another
way to compare PDE solver.
As far as I know, there are several ways to
solve PDE

1) Finite Difference Time Domain (FDTD)
2) Finite Element Method (FEM)
3) Method of Moment (MOM)
4) Finite Integration Method (I donot know much
about this one, which is used by CST MW$)

You may add more, please, if I miss some.
Well, you can also use parallel computing, which I
am interested in but have no chance to try yet.

Every PDE solver has is plus and minus.
My point is that unless the PDE solver has a big
progress, the EM solver will stay steady for a while
and you can NOT see a super-fast, super-accurate,
EM solver happening.

Regards
Div
 

yuyu

Advanced Member level 4
Joined
Mar 27, 2002
Messages
108
Helped
13
Reputation
26
Reaction score
12
Trophy points
1,298
Activity points
1,018
fast field solver tutorial

Finite Integration Method is very similar to FDTD; in practise, Maxwell equations are solved in integral form instead of differential form and that is more suitable to develop conformal schemes.

Regards.
 

edf

Full Member level 2
Joined
Feb 21, 2002
Messages
121
Helped
21
Reputation
42
Reaction score
18
Trophy points
1,298
Activity points
700
welcher em solver ist der bester

OOPS. Sorry for blank post. I have demo ed EMPIRE and SEMCAD which are FDTD software. EMPIRE hase a very laborious GU interface but is one of the lower cost softwares. SEMCAD seemed to have a simpler drawing command structure than MWS but it was slower in analysis (much slower). I prefer not having to be an expert in the theory of FDTD to get good engineering analysis fast.
 

eirp

Advanced Member level 1
Joined
Dec 11, 2001
Messages
466
Helped
29
Reputation
56
Reaction score
19
Trophy points
1,298
Location
Phase center
Activity points
5,142
best pde solver

I've tested EMPIRE 3.0. It's absolutely unfriendly for me, after one day of work I didn't built any of examples...
One advantage is that it can display electric currents.
Do you have any better experiences with Emire??
Regards,
Eirp
 

toonafishy

Full Member level 6
Joined
Jun 18, 2002
Messages
369
Helped
38
Reputation
76
Reaction score
12
Trophy points
1,298
Location
Earth
Activity points
3,187
(3d moment method or 3d method of moments) matlab

I've been learning hf$$ lately. Its hard to enter the geometry but once that's done, it works well. Convergence hasn't been a problem. I've just done stripline stuff so far but the view of the E/H fields allowed me to see where the imbalance was in the structure and to correct it. Very nice indeed.
 

shou

Member level 4
Joined
Sep 5, 2001
Messages
77
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
417
I always use @gLI@ent H1F55 in my design. I think it is the bett one.
 

egliu

Member level 4
Joined
Jan 15, 2003
Messages
71
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
587
HFss

hi

I am using ansoft HFSS and XFDTD, I think for a frequency simulation, HFSS is better, but for a sweep application, I normally choose XFDTD.

regards
 

yingyang

Full Member level 2
Joined
Dec 26, 2002
Messages
126
Helped
2
Reputation
4
Reaction score
2
Trophy points
1,298
Activity points
862
best solver

I think Feko is nice....
 

aw

Member level 3
Joined
Jun 9, 2001
Messages
54
Helped
5
Reputation
10
Reaction score
3
Trophy points
1,288
Activity points
333
Generally, the future trend wil be towards Time Domain - this is what we are modelling in real life - you can also use the results from time domain to calculate parameters required in time domain reflectometry etc.

A major weakness of Ansoft for example is its poor scalability - bigger model (n*lambda), non-linear requirement of memeory - that's why ansoft were desperate for 64 bit. Can HFSS (easily) simulate antenna systems of the 10 lambda range? This is important - modelling and simulating small structures is possible with all the simulators but the trend is towards larger models/systems.

Frequency domain methods are generally not ideal for HF/MW because you cannot always know in advance where resonances are going to occur.
Even fast frequency sweep methods are inefficient. TD allows an accurate range of S-Parameter in one simulation.

Of course, there are other aspects that should be considered - materials, post-processing etc.
 

jpsmith123

Full Member level 2
Joined
Dec 5, 2002
Messages
137
Helped
4
Reputation
8
Reaction score
1
Trophy points
1,298
Activity points
1,070
Zeland Fidelity

What about the Zeland FDTD program "Fidelity"...does anyone have any experience with it? Is it user friendly?

Regards,
Joe
 

loucy

Advanced Member level 1
Joined
Aug 26, 2001
Messages
414
Helped
24
Reputation
48
Reaction score
11
Trophy points
1,298
Activity points
4,657
It looks like Zeland hasn't put much effort on improving Fidelity.

XFDTD hasn't upgraded for quite some time.
 

sviodo

Member level 4
Joined
Jan 2, 2002
Messages
68
Helped
1
Reputation
2
Reaction score
1
Trophy points
1,288
Activity points
533
about empire:

any comments?
because i had similar feeling to the one eirp had :>
(2 hours and i gave up)

Rgz,
 

eirp

Advanced Member level 1
Joined
Dec 11, 2001
Messages
466
Helped
29
Reputation
56
Reaction score
19
Trophy points
1,298
Location
Phase center
Activity points
5,142
loucy said:
It looks like Zeland hasn't put much effort on improving Fidelity.

XFDTD hasn't upgraded for quite some time.
Excuse me if I'll write my opinion on Fidelity - it's a piece of sh.. !!
I've worked with it time ago and results were wrong in most cases. And don't let me talk about stability and GUI...
Don't use it, save your time and resources!!!!
Regards,
Eirp
 

filterman

Member level 2
Joined
Jan 18, 2002
Messages
52
Helped
1
Reputation
2
Reaction score
1
Trophy points
1,288
Activity points
512
loucy said:
It looks like Zeland hasn't put much effort on improving Fidelity.

Wrong,they improoved Fidelity a lot and as of ver.4.0 it will have conformal as well.
Some of the students that use the 3.5 version say it is very fast and easy to learn and use.
Don't forget that Zeland Software became also object oriented like MWO, CST, and Ansoft Designer(when it will be available??).
 

div

Member level 3
Joined
Jun 17, 2002
Messages
59
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,286
Activity points
611
Rank of the solvers?

Hi there:

In stead of talking about indivitual tools,
how about give a ranking for the following list:

IE3D & Fidelity
Ans0ft HFSS
Micr0wave office
ADS momentum
Empire
CST microwave studio
XFDTD
FEKO

The list doesnot include all the solvers, and
I am NOT ranking it.
You could add more if you want.

Regards
Div
 

yuyu

Advanced Member level 4
Joined
Mar 27, 2002
Messages
108
Helped
13
Reputation
26
Reaction score
12
Trophy points
1,298
Activity points
1,018
Hi Div,
first of all Microwave Office is a circuital software. This CAD has an e.m. option, with extra payment but is a planar solver.
Also Momentum is a planar solver.
IE3D is not a true 3D e.m. simulator.
Empire is not an expensive FDTD simulator but is not friendly and it is not accurate.
HFSS is good generally but not for radiation problem (memory resources).
FEKo is a moment based code, very fast but not for general purpose application.
I don't know XFDTD.
Microwave Studio is very good for general purpose and especially for radiation problems.

Regards
 

sugm

Member level 2
Joined
Dec 11, 2001
Messages
47
Helped
1
Reputation
2
Reaction score
1
Trophy points
1,288
Activity points
253
I think MWS is a better choice for 3D solution.
 

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top