Impedances and transmission line effects...

[pwdrive]

On the subject of transmission lines and loads here's a link to a series of videos for a quick intro to using the Smith chart, not fully comprehensive but easy to follow, plenty of other explanations on the web:

https://www.youtube.com/watch?v=hmqM8PnUkmo

Another by the same bloke:

https://www.youtube.com/watch?v=Cd1H5ElNBo8

Lawrence.