Antennas for Emergency Communications. HF Antenna. The NVIS Antenna. The Problem. Introduction to NVIS. What Is NVIS? What are the advantages of NVIS? How to deploy NVIS. What Is NVIS?.
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Antennas for Emergency Communications
The NVIS Antenna
“D” layer losses
Ionospheric scattering for vertical propagation
Importance of critical frequency
NVIS is not an antenna, but a technique.
Reliable communications between stations are based on three major factors.
Here are some areas that might be of interest to those that would like to learn more about NVIS