physical significance of S-parameters ??

[bcdeepak]

what should be the answer for " what is the physical significance of S- parameters " ??

my teacher is asking me this many times, but he is not get satisfied with my answers

plz tell me

 

[vfone]

If he didn’t give you the answer yet probably he wants to look more important than actually he is. This is a usual behavior especially of the university teachers.

S parameters relates to the traveling waves that are scattered or reflected between two or more network ports.

I can compare the S (scattering) parameters with Optics from Physics.
There, we also have dispersion (or scattering) and reflection of the waves, which in that case is light.

 

[pabloec]

S parameters relate the reflection and transport of a voltage wave.

 

[wandering heart]

I think S-parameters have many versions, in Optics, network, microwave, and so on. Furthermore they are for different physical quantities in all the situations. So I'm totally confused which should I use for a specific problem.

Who can give some authoritative explanation?
Thanks!

 

[BigBoss]

S-parameters are small signal behaviour of a system whatever is.These are used to characterize and to model the systems.

PS.Sytems can be any kind of system,active,passive,black box,feedback applied,positive fedbacked systems..etc

 

[vedaprabhu]

The network parameters like z,y,h,g,t etc are used for low frequencies...but at high frequencies s parameters are needed to reduce a distributed element network into a lumped one...that is why s -parameters are need ...