Post subject: simulation of an impedance step, Transistor ->
Match Net. Posted: Fri Apr 28, 2006 1:23 pm
Joined: Fri Apr 28, 2006 1:09 pm
I wonder how to simulate follwing condition correctly:
I have a Transistor with a connection lead of 12 mm width.
first matching element has a width of 23mm.
I have a large signal
model of the transistor for my simulator (ADS).
Das anyone konw,
how to simulate the behaviour correctley?
Transistor -> Microstripline
Transisor -> Impedance Step (12mm
-> 23mm) -> Microstip (23mm)
Both simulatons show different
Would be happy for the comments from you.
Post subject: Posted: Fri Apr 28, 2006 3:43
Joined: Mon Jun 27, 2005 2:02 pm
The second option
which you mentioned, namely to use an impedance step is the right one.
Of course that both simulations show different results, because you
have a discontinuity in the impedance if you don't use an impedance
step, and therfore you get an impedance mismatch and poor return loss.