Because radio communication is carried on by means of electromagnetic waves traveling through the Earth’s atmosphere, it is important to understand the nature of these waves and their behavior in the propagation medium. Most antennas will radiate the power applied to them efficiently,
but no antenna can do all things equally well, under all circumstances. Whether you design and build your own antennas, or buy them and have them put up by a professional, you’ll need propagation know-how for best results, both during the planning stages and while operating your station. For station planning, this chapter contains detailed new
information on elevation angles from transmitting locations throughout the world to important areas throughout the world. With this information in hand, you can design your own antenna installation for optimum capabilities possible within your budget. |