- #1

Niles

- 1,868

- 0

## Homework Statement

Hi all.

I have the following expression, which relates the incoming amplitude with the reflected amplitude at a point x = L in a coaxial cable:

[tex]

A_{\text{reflected}} = \frac{R-Z_0}{R+Z_0}A_{\text{incoming}}.

[/tex]

Here R is the resistance at the point x = L and Z

_{0}is the characteristic impedance of the cable.

Lets say that I do

**not**terminate the cable at point x = L, i.e. it is just left open. Then R = infinity, which gives me that [itex]A_{\text{reflected}}=A_{\text{incoming}}[/itex].

I know that the current I is zero at the point x=L (since the cable is left open, no current can run thorugh here), but how does this match up with the fact that [itex]A_{\text{reflected}}=A_{\text{incoming}}[/itex]?

Thanks in advance.

Best regards,

Niles.