This public-domain book provides concise descriptions of concepts related to RF, radar, microwave components, and more.
This handbook is designed to aid electronic warfare and radar systems engineers in making general estimations regarding capabilities of systems. This handbook is sponsored by the NAVAIR Director of Electronic Warfare/Combat Systems Department.
This interactive demo allows you to experiment with waves and reflections under various conditions. The demonstration shows mechanical waves but the concepts are analogous to EM waves on transmission lines.
Watch a string vibrate in slow motion. Wiggle the end of the string and make waves, or adjust the frequency and amplitude of an oscillator. Adjust the damping and tension. The end can be fixed, loose, or open.
Although this video is from 1959, it still provides and excellent explanation of wave properties and reflections.
Update November 2021: login no longer required to use this app! Visit the reflectometer page (HTML5/JavaScript version)
The old Java version is still available.