Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics 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

calculation accuracy in HFSS

Status
Not open for further replies.
M

medanisse

Newbie level 6
Joined
Sep 29, 2010
Messages
14
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,398
I seek to determine the parameter S21 of a structure for a fixed frequency and a horizontal axis variable. The curve obtained for S21 is very unstable. How to increase the accuracy of the calculation of S21

thank you for your help
 

In projects tree find Analysis, double click on "Setup", increase "Maximum number of passes" and decrease "Maximum Delta S"
 

Thank you for your help

I increase "Maximum number of passes" and I decrease "Maximum Delta S", but I still have the same problem of instability of parameter S21

The second problem: the S21 parameter changes by changing boundaries of structure. Can you give me a method that allows me to calculate the exact dimensions of the boundaries of structure
 

Sometimes, you need to increase the input and output coupling strength to get a stable s21 curve. If the coupling is too weak, you won't get stable results.
 

How to increase this coupling knowing that both Ports 1 and 2 are of type excitation lumpPort
 

medanisse said:
Thank you for your help

I increase "Maximum number of passes" and I decrease "Maximum Delta S", but I still have the same problem of instability of parameter S21

The second problem: the S21 parameter changes by changing boundaries of structure. Can you give me a method that allows me to calculate the exact dimensions of the boundaries of structure
Click to expand...

How "instable" is the S21? Varying between -10~-5 or -25~-20 are different stories.
 

IF you have Transmission lines that are very close to the boundary, your results will differ with altering the distance between these lines and the boundary.
Increase this distance, so your results will be accurate. this might be your problem.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top