Input impedace simulation warning in ADS

[longlongago0715]

Hi, i'm having the following warning message when running a simple Zin simulation in ADS, and there is no dataset named Zin, can you please help me? Thx a lot!

 

[volker@muehlhaus]

Your calculation uses variable PortZ1 which is not defined. You have entered 50 in the port, so that's the value you need.

 

[longlongago0715]

Your calculation uses variable PortZ1 which is not defined. You have entered 50 in the port, so that's the value you need.

Thanks for your reply, but i don't use any variable here, and i tried changing PortZ1 to 50, the warning message is like this:

 

[volker@muehlhaus]

Indeed, I was wrong. There is no need for Variable PortZ1.

When I tried the simulation shown below in ADS 2024U1, it worked fine. I have no idea why your simulation fails.

 

[longlongago0715]

Indeed, I was wrong. There is no need for Variable PortZ1.

When I tried the simulation shown below in ADS 2024U1, it worked fine. I have no idea why your simulation fails.

View attachment 197799

Ok, thanks anyway, maybe i should try rebooting my computer, it's been working for a couple of days

 

[BigBoss]

I think the measurement expression has syntax error. The name of the expression confuses the variable.
Try
Zin_myport1=zin(S11,50.0)

 

[volker@muehlhaus]

I think the measurement expression has syntax error.

I had never used this before, but it is actually the "Zin" element from ADS component library, see my screenshot in #4.
Looks weird, but it worked out of the box when I placed it onto a test schematic.

No idea why it fails in the original question, looks exactly like mine.

 

[longlongago0715]

I think the measurement expression has syntax error. The name of the expression confuses the variable.
Try
Zin_myport1=zin(S11,50.0)

I tried your method, but it's just the same