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FREQUENCY BANDS |
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Electromagnetic waves |
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VLF |
LF |
MF |
HF |
VHF |
UHF |
SHF |
EHF |
visible light |
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Very low |
low |
Medium |
High |
Very high |
Ultra High |
Super High |
Extra High |
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3 - 30 KHZ |
30 - 300 KHZ |
300 KHz - 3 MHZ |
3 - 30 MHZ |
30 MHZ - 300 MHZ |
300 MHZ - 3 GHZ |
3 - 30 GHZ |
30 - 300GHZ |
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Used by submarines |
Mostly used for Navigation |
Good Ground wave |
Overseas communications |
Line of sight |
Almost total line of sight |
Satellite, very direct |
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AM Radio |
Good Sky wave |
short range |
Ground to air good |
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Royal Flying Doctors |
TV, FM radio. |
Mobile phones |
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Long range military or civillian |
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CB Radio's |
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Bigger wavelength and antennas |
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Smaller wavelength and antennas |
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Wavelength 100m - 10m |
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Wavelength 1m - 10cm |
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LARGE WAVELENGTHS |
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SHORT WAVELENGTHS |
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OLD CB RADIO 27MHZ |
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NEW CB RADIO 477 MHZ |
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HIGH FREQUENCIES |
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Hz means cycles per second |
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AM radio - 535 kilohertz to 1.7 megahertz |
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Citizens
band (CB) radio (UHF) - 26.96 megahertz to 27.41
megahertz |
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Television stations (VHF) - 45 - 230 MMZ |
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FM radio - 88 megahertz to 108 megahertz |
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Television
stations (UHF)
- 526 - 820 MHZ eg SBS 585.625
MHz |
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Standard
cordless phones: Bands from 40 to 50 megahertz |
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Mobile phone 800MHZ, 900 MHZ, 1800 MHZ |
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Global
Positioning System: 1,227 and 1,575 megahertz |
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EPIRB emergency beakons - old 121.5, 243 MHZ |
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EPIRB emergency beakons - new 406 MHZ |
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