频段划分
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DC 0 Hz
Power frequencies 10-1000 Hz
Audio 20-20,000 Hz
Video 50 Hz-4.5 MHz
Supersonic or ultrasonic 25 kHz-2 MHz
Very low radio frequency(VLF) 10-30 kHz
Low radio frequency(LF) 30-300 kHz
Medium radio frequency(MF) 300 kHz-3 MHz
High radio frequency(HF) 3-30 MHz
Very high radio frequency(VHF) 30-300 MHz
Ultra high radio frequency(UHF) 300 MHz-3 GHz
Super high radio frequency(SHF) 3-30 GHz
Extremely high radio frequency(EHF) 30-300 GHz
Heat or infrared 1x1012-4.3x1014 Hz
Visible light red to violet 4.3x1014-1x1015 Hz
Ultraviolet 1x1015-6x1016 Hz
X-rays 6x1016-3x1019 Hz
Gamma rays 3x1019-5x1020 Hz
Cosmic rays 5x1020-8x1021 Hz
下面是IEEE Microwave Band
HF 3-30 MHz
VHF 30-300 MHz
UHF 300 MHz-1 GHz
L-Band 1-2 GHz
S-Band 2-4 GHz
C 4-8 GHz
X 8-12 GHz
Ku 12-18 GHz
Kc 18-27 GHz
Ka 27-40 GHz
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