| T O P I C R E V I E W |
| hn1 |
Posted - Feb 03 2009 : 01:50:45
Dear all,
I am new in fasthenry and I am trying to extract the RLC model of a coplanar transmission line with 1 signal line and a couple of finite width ground line. I wrote the following code:
* sample code
*
.UNITS MM
* Aluminium used as metal
.Default z=0 sigma=3.78e4
.DEFAULT Z=85. nhinc=3 nwinc=5 rh=2 rw=2
*
* BEAM 1
*
N1B Y=0.1 X=0.
N1C Y=0.1 X=10.
E1C N1B N1C w=0.3 h=0.03
.EXTERNAL N1B N1C port1
*
* BEAM 2
*
N2B Y=1.405 X=0.
N2C Y=1.405 X=10.
E2C N2B N2C w=0.1 h=0.032
.EXTERNAL N2B N2C port2
*
* BEAM 3
*
N3B Y=2.66 X=0.
N3C Y=2.66 X=10.
E3C N3B N3C w=0.3 h=0.032
.EXTERNAL N3B N3C port3
*
.freq fmin=1e10 fmax=1e10 ndec=1
.END
I think the code is not complete. I do not know how to define ground and signal here. Should I just connect the ground lines together? By the way, the result is a 3*3 matrix but I expect a number as inductance and resistance per meter. How can I derive that number out of this matrix.
Thanks, |
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