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

a problem of ensemble - adaptive analysis option

Status
Not open for further replies.

hakunamatata

Member level 1
Joined
Feb 26, 2003
Messages
33
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
300
a problem of ensemble

hi,i am designing the microstrip filer with ensemble and i had thought that the speed of ensemble is very fast but not very accurate till i found we can increase the mesh on the microstrip filter to
improve the accuracy but the time of simulating increase too ,and
i also cannt understand the"adaptive analysis"option in the "set up solution"option,i want to know how to use this option to improve the
accuracy of the filter!
thanks !
 

g86

Full Member level 4
Joined
Jan 21, 2003
Messages
212
Helped
11
Reputation
22
Reaction score
7
Trophy points
1,298
Location
On top of antenna :))
Activity points
2,232
Re: a problem of ensemble

This is actually a good option to get an idea of convergence of result. Somtimes for a spacific mashing the simulated result may vary significantly if you go for more dense meshing. Using adaptive meshing you can have a converged result. But you may have to wait for longer time.

Many people things 20 celles/wavelength option in IE3D gives good results. But there is no way to check the convergence until you go for higher no of cells. In fact for coupld line structures 20 cell/wavelength gives large error.

Another thing is that a converged result may or may not be accurate. Accuracy depends upon the modelling. Say the edge feed in Ensemble does not use a good model.

:!: :idea: :?:

hakunamatata said:
hi,i am designing the microstrip filer with ensemble and i had thought that the speed of ensemble is very fast but not very accurate till i found we can increase the mesh on the microstrip filter to
improve the accuracy but the time of simulating increase too ,and
i also cannt understand the"adaptive analysis"option in the "set up solution"option,i want to know how to use this option to improve the
accuracy of the filter!
thanks !
 

sviodo

Member level 4
Joined
Jan 2, 2002
Messages
68
Helped
1
Reputation
2
Reaction score
1
Trophy points
1,288
Activity points
533
fast sweep is a method of analysis that produces results faster not more accurate and requires you to set up appropriate bandwidth.
btw. in my experience ensemble produced accurate results (?) but i was analysing power dividers not filters :>

--
Rgz
 

hakunamatata

Member level 1
Joined
Feb 26, 2003
Messages
33
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
300
hi,g86,i am designing a microstrip filter using HTS.the tranmission band is 2~2.025Ghz.when i use ensemble ,i donnt know whats the value in"adaptive frequency option"in"adaptive analysis option"is proper!and i found that if i change the value in"adaptive frequency option" ,the speed of convergency is also different.sometimes it cannot be convergent when i set the suggested value 0.05 in the"target maximum delta norm(q) option".why?and whats the value in "target.."is proper.
i need some information about these!
thanks in advance!
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top