- #1
icesalmon
- 270
- 13
- Homework Statement
- Figure for problems 1 and 2: Figure shows a transmission line system. The
effective dielectric constant of the TL is 9 and its length is 2 m. The source is a
DC voltage source. The other parameters are as follows: Vg = 10V, Zg = 20ohms Z0 = 40ohms ZL = 60ohms
Q: Calculate and plot the current at the center of the transmission line as a
function of time between 0ns and 70ns.
- Relevant Equations
- V = I*Z
The propagation speed of the wave is C/sqrt(9) = up if the length of the transmission line is 2m then every 10ns it will pass through the middle of the transmission line. But the switch in the circuit is opened after 5ns so after the current wave bounces off of the Load for the first time it will travel back to the generator and then bounce off of that and travel back towards the load again, but because of the open circuit I should be measuring 0A at 30ns, 50ns, and 70ns (the times at which the current wave would pass through the center of the transmission line) The solution for this problem shows non-zero amplitudes of the current wave at these times. I don't understand how this is possible.