Frequency
Introduction to Electromagnetic Spectrum [Req 3]
=
=
1 cycle per second
or
1 Hertz
8 Hertz
1 second
1
1-5
1-4
1-3
1-2
1-1
Wavelength
• Longer wavelengths
• Lower frequencies
• Lower energy
1
1
2
Electromagnetic Spectrum [Req 3]
3
• Shorter wavelengths
• Higher frequencies
• Higher energy
2
2-6
2-4
2-3
2-2
2-1
2-5
2-7
Electromagnetic Spectrum [Req 3]
MF
300 kHz
HF
3 MHz
VHF
30 MHz
UHF
300 MHz
MEDIUM FREQUENCY
1 MHz
2 MHz
3 MHz
HIGH FREQUENCY
10 MHz
20 MHz
30 MHz
VERY HIGH FREQUENCY
100 MHz
200 MHz
300 MHz
ULTRA HIGH FREQUENCY
1 GHz
2 GHz
3 GHz
3
3-1
3-6
3-5
3-4
3-3
3-2
Electromagnetic Spectrum [Req 3]
ELF
Extremely Low Frequency
SLF
Super Low Frequency
ULF
Ultra Low Frequency
VLF
Very Low Frequency
LF
Low Frequency
MF
Medium Frequency
HF
High Frequency
VHF
3 Hz
30 Hz
30 Hz
300 Hz
300 Hz
3 kHz
3 kHz
30 kHz
30 kHz
300 kHz
300 kHz
3 MHz
3 MHz
30 MHz
Very High Frequency
30 MHz
300 MHz
UHF
Ultra High Frequency
300 MHz
3 GHz
SHF
Super High Frequency
3 GHz
30 GHz
EHF
Extremely High Frequency
30 GHz
300 GHz
THF
Tremendously High Frequency
300 GHz
3 THz
4
4-3
4-2
4-1
MF
300 kHz
AM Broadcast
160M
Electromagnetic Spectrum [Req 3]
Marine
1 MHz
2 MHz
3 MHz
10 MHz
20 MHz
30 MHz
100 MHz
200 MHz
300 MHz
1 GHz
2 GHz
3 GHz
HF
3 MHz
VHF
30 MHz
UHF
300 MHz
5
8-1
3 MHz
CB
3 MHz
12M
17M
2 MHz
20M
30M
40M
1 MHz
60M
HF
80M
300 kHz
Marine
10M
AM Broadcast
15M
MF
160M
Electromagnetic Spectrum [Req 3]
10 MHz
20 MHz
30 MHz
100 MHz
200 MHz
300 MHz
1 GHz
2 GHz
3 GHz
VHF
30 MHz
UHF
300 MHz
6
8-1
AVIATION
CB
12M
17M
TV
30 MHz
1.25M
FM
WEATHER
TV
VHFHIGH
TV
3 MHz
20 MHz
2M
6M
VHFLOW
30 MHz
20M
40M
10 MHz
3 MHz
VHF
2 MHz
30M
1 MHz
60M
HF
80M
300 kHz
Marine
10M
AM Broadcast
15M
MF
160M
Electromagnetic Spectrum [Req 3]
100 MHz
200 MHz
300 MHz
1 GHz
2 GHz
3 GHz
UHF
300 MHz
7
7-2
7-1
7-6
7-5
7-4
7-3
300 MHz
1 GHz
WEATHER
TV
12cm
300 MHz
13cm
2 GHz
CB
30 MHz
200 MHz
23cm
33cm
CELL
PHONES
TV
12M
17M
20M
AVIATION
100 MHz
FRS/GMRS
UHF
70cm
30 MHz
FM
TV
VHFHIGH
6M
VHFLOW
TV
3 MHz
20 MHz
2M
10 MHz
3 MHz
VHF
2 MHz
30M
40M
60M
80M
HF
1 MHz
1.25M
300 kHz
Marine
10M
AM Broadcast
15M
MF
160M
Electromagnetic Spectrum [Req 3]
3 GHz
8-5
8
8-2
8-1
8-4
8-3
300 MHz
1 GHz
10M
1.25M
300 MHz
12cm
200 MHz
2 GHz
CB
12M
17M
20M
WWV
WEATHER
TV
23cm
33cm
TV
CELL
PHONES
100 MHz
70cm
UHF
AVIATION
30 MHz
13cm
30 MHz
FM
TV
VHFHIGH
6M
FRS/GMRS
VHFLOW
TV
3 MHz
20 MHz
2M
10 MHz
3 MHz
VHF
2 MHz
30M
WWV
40M
60M
WWV
80M
HF
1 MHz
15M
300 kHz
Marine
WWV
AM Broadcast
WWV
MF
160M
Electromagnetic Spectrum [Req 3]
3 GHz
9
Electromagnetic Spectrum [Req 3]
MF
HF
VHF
UHF
10