Question

Explain standing wave ratio and write all its expression ?
copyed ans reported
sorry for that its against the brainly rule .​

Answer 1

Answer:

Standing-wave ratio (SWR) is a mathematical expression of the non-uniformity of an electromagnetic field (EM field) on a transmission line such as coaxial cable. Usually, SWR is defined as the ratio of the maximum radio-frequency (RF) voltage to the minimum RF voltage along the line. This is also known as the voltage standing-wave ratio (VSWR). The SWR can also be defined as the ratio of the maximum RF current to the minimum RF current on the line (current standing-wave ratio or ISWR). For most practical purposes, ISWR is the same as VSWR.

Answer 2

Standing wave ratio (SER)-----> In any medium ,there exist incident and reflected wave .

if incident and reflected waves are in phase then electric field are added and gives maximum value .

Emax = |Eio| + |Ero|

Emin = |Eio| - |Ero|

So

SWR = { | Eio| + | Ero|}/{|Eio| - |Ero|}