7. Radio Propagation
Frequency Names Propagation Features
up to 3 MHz
•Very Low Frequency
(VLF)
•Low Frequency (LF)
•Medium Frequency (MF)
ground wave
3 to 30 MHz. •High Frequency (HF) sky waves
above 30 MHz
•Very High Frequency
(VHF)
•Ultra High Frequency
(UHF)
•Super High Frequency
(SHF)
•Extremely High Frequency
(EHF)
Propagation is by line-of-sight (space waves),
24. Get A License !!!
Volunteer Examiners (VE)
In Thailand and AEC Region FCC Amateur Radio
License ARRL VEC Examination
Please Visit http://www.e21eic.net
Or Getting License With NBTC Training & Exam
Please Visit http://www.nbtc.go.th