ADS syntax error with {t}

I am trying to replicate Analysis and Design of Impedance-Transforming Planar Marchand Baluns

One other people is using Zr=100{t} which gives syntax error in ADS.

Why use Zr=100{t} ?

The {t} suffix is shown if you have enabled (and defined) tuning in the element parameters dialog.

What ?
I do not understand

You don't add the {t} manually. It only shows that the component value has tuning switched on.

In your example, someone tried to tune different values of Zr.

thanks. Do you have any idea how to derive the expression for C which is the coupling factor mentioned in both papers ?

How to create a slider with markers on both lines ?

so that I could see the Y-axis values for both red and blue traces at 60 GHz

I have solved all the simulation issues.

What I worry the most is the theory proof or derivation which is highlighted in the first paper link.

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