ARRL

Chapters 9 & 10 - Antennas, Feed Lines, & Topics in Radio Propagation

Antennas, Feed Lines, & Topics in Radio Propagation

Antennas and propagation are the heart of what makes radio a unique form of communication. Amateurs enjoy building and experimenting with antennas, one of the most active areas of experimentation. Amateurs have also excelled over the years in ferreting out new and useful modes of propagation.  Resources for these two chapters of the Extra Class exam will support you as you study.