If you are interested in learning the basics of radio wave propagation, transmission lines and antennas here is a great PDF file for you to download. "COMMUNICATIONS-ELECTRONICS FUNDAMENTALS" This 269 PDF from the headquarters department of the army is a great way to get started in learning about the basics of radio.
Click here to download.
If you have trouble with the link email me email@example.com and I will email you a copy.
Remember to visit http://www.preher-tech.com/