Hi all.

I am looking at a coaxial-cable, which starts at z=0 and ends at z=L, so it has a length L.

At z=0 is it short-circuited, and at z=L there is an inductor connected. I need to find the boundary conditions that this gives me.

For z=0 the potential V(0,t)=0, since R=0, and if V was not zero, then the current would be infinite. So this is all good.

But at z=L I do not know what the boundary conditions are. Can you give me a push in the right direction?

Thanks in advance.

Sincerely,
Niles.

 

That may have to do with the frequency of the applied signal. Think wavelength.

 

Hi all.

I am looking at a coaxial-cable, which starts at z=0 and ends at z=L, so it has a length L.

At z=0 is it short-circuited, and at z=L there is an inductor connected. I need to find the boundary conditions that this gives me.

For z=0 the potential V(0,t)=0, since R=0, and if V was not zero, then the current would be infinite. So this is all good.

But at z=L I do not know what the boundary conditions are. Can you give me a push in the right direction?

Thanks in advance.

Sincerely,
Niles.

http://www.ece.uci.edu/docs/hspice/hspice_2001_2-269.html

Here's one of the better transmission line tutorials around. It might help to use the "lumped component" model to solve your problem.

Eric

 

Thanks to both of you.