A practical educational guide to common and uncommon VHF propagation modes, covering thephysics, range implications, and real-world behaviors engineers need to understand.
What Attendees will Learn
- Why “line of sight” fails as a practical VHF planning model.
- How refraction, reflection, diffraction, and scattering deliver or destroy signals where geometry alone cannot predict.
- How tropospheric refraction extends the VHF radio horizon roughly one-third beyond optical line of sight.
- How temperature inversions form ducts that can carry VHF signals over 1,500 km.
- How sporadic E, meteor burst, and EME propagate VHF signals across hundreds to thousands of kilometers.
- What frequency limits, distance ranges, and environmental triggers apply to each propagation mode.
- How to apply this knowledge to link budgeting, interference prediction, and contingency planning.
