Question #896Antennas and Radio Wave Propagation

Maximum Usable Frequency (MUF) is

  1. The critical frequency of the D-layer
  2. The frequency of maximum absorption
  3. The highest frequency that can be used for communication between two points via the ionosphere ✓ Correct answer
  4. The lowest usable frequency
Explanation: MUF is the highest frequency that will support a path.