×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

What is the principle behind standing waves?

What is the principle behind standing waves?

What is the principle behind standing waves?

(OP)
Hi There,

Does anybody know where we get to have standing waves whenever the terminator of our transmission line is not equal to the characteristic impedance?
Are there any theory behind this?

Thanks!
Hono'o

RE: What is the principle behind standing waves?

In layman's terms, standing waves are created on a transmission medium when the physical wavelength of the transmitted frequency (as perceived by the transmitter) is not equal to the electrical wavelength of that same frequency, resulting in some of the energy not being transmitted, but rather remaining on the transmission line (hence the term "Standing Wave").  Think of it as water being pushed through a hose by a faucet, but part of the water does not exit the hose and in fact begins returning toward the faucet, colliding with the other water being pushed out and resulting in less water transiting the hose.

http://www.anixter.com/techlib/d0500p01.htm has some technical tests which examine the action of standing waves as a result of impedance mismatch.  You might want to look at Levels Lab Reports and particularly Reports 2 (Increased performance of Matched Systems) and 4 (Return Loss and its Effect on Network Performance).

Cheers

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources