Connect with us

Transmission Line Problem

Discussion in 'Electronic Basics' started by jakob, Aug 5, 2003.

Scroll to continue with content
  1. jakob

    jakob Guest

    Say you have a circuit where a signal-generator Vg(t) is in series
    with a generator impedance Zg. A transmission line of length k is in
    series with Zg. At the end of the transmission line an impedance load
    ZL is connected.

    This is a sketch of the circuit:

    | |
    Vg(t) |
    | ZL
    | |

    Say you know the basic parametres for the transmission line C,G, L and

    And you also know the signals angular frequency w

    How do you calculate v(x,t) which is the voltage at position x at time
    on the transmission line?

    As far as I understand the solution is:

    v(x,t) = real part of the complex number V(x)*exp(-jwt)

    where V(x) = Vp * exp (jgx) + Vm * exp (-jgx) is the phasor and g is
    the propagation constant

    If this is correct, how do I calculate all the necessary constants
    like Vp and Vm ?
  2. jakob

    jakob Guest

    for some reason the diagram changes when I commit it...

    so I will try to describe it like this instead:

    GND --- Vg --- Zg ---(transmissionline)---ZL---GND
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day