Matching port in Agilent MOMENTUM
How to define, in Momentum, a port having impedance matching with the characteristic impedance of the linked network ?
I have to simulate a two ports network over a wide range of frequencies and I would like to close the output port on a matched impedance; anyway, when I define a port, I can indicate just a single value of impedance
Export layout in to schematic by component create look alike option.
Now use REf net design termination in schematic.
My problem is the following:
I have drawn a layout in Momentum: 2 square coils (in cond & cond2) with some substrates in between. Then I have defined 2 pairs of ports for the 2 coils: each pairs is realized using an internal port and a ground reference port.
Which value should I use for the impedance of the two internal ports ?
The default one is 50 Ohm
Now I would like to make a S-parameter calculation using Momentum: should I close the two pairs of ports on two impedances matching the characteristic impedance of the network ?
Thanks a lot for your precious help! :D
Problem is not understood by me.
Added after 50 seconds:
Some one please help him.
Hi,
I have had a long discussion with an Agilent expert and now I have the ideas a little more clear:
S-matrix depends only by the network and not by the source/load impedance.
Setting the input & output ports at 50 Ohms will return me a S-matrix normalized to 50 Ohms (S_50). Setting the input & output ports at 75 Ohms will return me a S-matrix normalized to 75 Ohms (S_75)... and so on...
I can pass from one to the other with some calculus and that all, I don't need to close my network on matched loads to run simulations.
I hope I have correctly understood!