| FREQUENCY
ZONE |
FREQUENCY |
- WAVELENGTH
- IN THE AIR
|
TRANSMISSION
SOURCES |
| E.L.F. |
0-300
Hz. |
>1000
Km |
Electric
Lines; Radio Frequencies; Underwater Communication |
| V.F. |
0.3-3
KHz |
100-1000
Km |
Human
Voice; Acoustic frequencies |
| V.L.F. |
3-30 KHz |
100-10 Km |
Acoustic Frequencies |
| L.F. |
30-300
KHz |
10-1
Km |
Navigational
radio frequency; Long Distance Communication |
| M.F. |
0.3
MHz |
1-0.1
Km |
Navigational
radio frequency; amateur radio staations |
| H.F. |
3-30
MHz |
100-10
m |
Amateur
Int'l.Radio Stations; Airport Control |
| V.H.F. |
30-300
MHz |
10-1
m |
Police;
FM-VHF-TV; Airport; Navigation Controls |
| U.H.F. |
0.3-3
GHz |
1-0.1
m |
Taxis;
Police; UHF-TV; Microwave Ovens; Medical Diathermy; Industrial
Microwaves |
| S.H.F. |
3-30
GHz |
10-1
cm |
RADAR;
Satellites |
| E.H.F. |
30-300
GHz |
1-0.1
cm |
RADAR;
Satellites; Radio spectra measurement |
| I.R. |
300
GHz - 300 THz |
1m-100µ |
Survelliance;
Electronic Warfare; Industrial heating |