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

The meaning of RLGC matrix in Sonnet software

Status
Not open for further replies.
M

mohandes79

Junior Member level 3
Joined
Nov 3, 2006
Messages
31
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
1,445
Hi all,

Just a simple question came across here. As Sonnet software computes RLGC matrix at desired frequencies, I was wondering how the matrix can be explained in terms of the R & L & G & C units e.g the capacitance is 1.2e-12 per unit length.
I am not sure that the software does convert the data to /meter or still needs to be considered as the unit length of the line?

Thanks in advance for your quick reply.
 

mohandes79 said:
I am not sure that the software does convert the data to /meter or still needs to be considered as the unit length of the line?
Click to expand...

This depends on the Sonnet version. The old format in v11 and older is per analyzed length. Example: if your analyzed line was 1.2mm long, the values are per 1.2mm length.

The new model in v12 has values per meter.
Note that there where some issues with line length for RLCG extraction in v12.52. The later version (12.54 and 12.56) are fine.
 
Last edited:

Thanks for your reply Volker. There is slightly difference when we have a look at RLGC file at 1GHz and the plotted equation e.g Inductance. Is it because the equation is calculated based on PI model?

Do you think considering RLGC matrix would be much beneficial rather than plotting the equations?

Thanks
 

mohandes79 said:
There is slightly difference when we have a look at RLGC file at 1GHz and the plotted equation e.g Inductance. Is it because the equation is calculated based on PI model?
Click to expand...

The inductance2 equation interprets the series path between port 1 and 2 as an inductor with series resistor. For each frequency, the (effective) inductance is calculated from Y21. If you physically have an inductor with parallel C, the equation will show a frequency dependent inductor without parallel C.

The lumped PI model output in v11.52 works a little but different because it takes data from two frequencies, and from the frequency dependence calculates the L and C components of that parallel circuit.

For the RLGC output, I am not sure. I was thinking that in v11.52, calculating the L component works the same way as the inductance2 equation.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top