On Apr 10, 4:21 am, "ilam" wrote:
I am in a process of understanding the importance of S-Parameter at
high frequencies, please answer my following questions:

1. Why Measuring a wave (voltage or current) is more easier than
volage and current? ( Why measuring S-Parameter is more easier than
other parameters?)

2. How the voltage and current waves are measured?

Measuring voltage and current are difficult at high frequncies, that
is why S-Parameter is more useful at high frequncies. Is the same
thing is true for simulation?

Regards,
Ilam

Search the agilent website for the original application note on S-
parameters.. it provides a great explanation of why S-parameters are
used.

You've correctly assessed the situation.. at microwave frequencies,
it's much easier to measure forward and reflected signals (and
calibrate for non-ideal directional couplers, etc.) than to measure
voltage and/or current.