#208

This video illustrates how RF (radio frequency) standing waves are created in transmission lines - through the addition of the forward (transmitted) wave and the reflected wave that results from improperly terminating the line or matching the load or antenna to the transmission line impedance. I have done several videos that relate to transmission lines, terminations and reflections - all of which tell a piece of the story. This video is another piece, and I hope it helps you to understand how standing waves are formed and what the "look" like. This wikipedia link has some great graphics (shown in my video):
https://en.wikipedia.org/wiki/Standin...
Here's my video on transmission lines and terminations:
   • #143: Transmission Line Terminations for D...  
Measuring the length and impedance of coax:
   • #37: Use a scope to measure the length and...  
How a directional coupler works:
   • #196: How a Directional Coupler in an SWR ...  
Measure velocity factor of coax:
   • #162: How to measure coax velocity factor ...  
RF Detector Probe used in this video:
   • #161: Circuit Fun: a simple RF detector / ...  
Brilliant mechanical explanation and demonstration of wave propagation and reflections, courtesy of Bell Labs:
   • AT&T Archives: Similiarities of Wave Behav...  
...and if you read this far, here's a challenge...
Brownie points to you if you can tell me how I created the "sliding" waveforms and displayed the static standing wave in the first half of the video.

Update: This video got posted on Hackaday!
http://hackaday.com/2015/08/06/visual...