- on Education & Information
- Published in issue 7/2006 on page 0
Antenna Heigth and Range
At frequencies below 30 MHz or so, radio transmitters can normally be received over great distances because certain layers of the ionosphere reflect radio signals with a certain frequency. These reflections normally do not take place at higher frequencies, so the maximum distance that can be covered is, in principle, limited to the visible horizon. How this theoretical distance can be calculated is explained here.