1. We will be in Read Only mode (no new threads, replies, registration) starting at 9:00 EDT for a number of hours as we migrate the forums to upgraded software.

waves reflection

Discussion in 'General Electronics Chat' started by Decesicum, Feb 28, 2007.

  1. Decesicum

    Thread Starter New Member

    Mar 20, 2006
    Why does a wave reflect when it meets an impedance discontinuity? And why is there a 180 degrees phase shift of the reflected wave when the transmission line finished with short circuit and no phase shift when the far end of the line is opened?
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    You might want to look at the E-book Volume II, chapter 13 for an explanation.
  3. Papabravo


    Feb 24, 2006
    The smart alecky answer is that the solution of the wave equation with the stated boundry conditions requires it. It is the unique solution to the problem. I know that doesn't help very much, but if you're interested in the mathematics I can recommend:

    Gonzales, G., Microwave Transistor Amplifiers,Prentice Hall,1997,pp4-20