"රේඩියෝ තරංග" හි සංශෝධන අතර වෙනස්කම්
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13 පේළිය:
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Band name Abbr
ITU band Frequency
and
Wavelength in air Example uses
subHertz
subHz 0 < 3 Hz
> 100,000 km
Natural and man-made electromagnetic waves millihertz, microhertz, nanohertz from earth, ionosphere, sun, planets, etc
Extremely low frequency
ELF 1 3–30 Hz
100,000 km – 10,000 km Communication with submarines
Super low frequency
SLF 2 30–300 Hz
10,000 km – 1000 km Communication with submarines
Ultra low frequency
ULF 3 300–3000 Hz
1000 km – 100 km Communication within mines
Very low frequency
VLF 4 3–30 kHz
100 km – 10 km Submarine communication, avalanche beacons, wireless heart rate monitors, geophysics
Low frequency
LF 5 30–300 kHz
10 km – 1 km Navigation, time signals, AM longwave broadcasting, RFID
Medium frequency
MF 6 300–3000 kHz
1 km – 100 m
AM (Medium-wave) broadcasts
High frequency
HF 7 3–30 MHz
100 m – 10 m Shortwave broadcasts, amateur radio and over-the-horizon aviation communications, RFID
Very high frequency
VHF 8 30–300 MHz
10 m – 1 m FM, television broadcasts and line-of-sight ground-to-aircraft and aircraft-to-aircraft communications. Land Mobile and Maritime Mobile communications
Ultra high frequency
UHF 9 300–3000 MHz
1 m – 100 mm
television broadcasts, microwave ovens, mobile phones, wireless LAN, Bluetooth, GPS and Two-Way Radios such as Land Mobile, FRS and GMRS Radios
Super high frequency
SHF 10 3–30 GHz
100 mm – 10 mm microwave devices, wireless LAN, most modern Radars
Extremely high frequency
EHF 11 30–300 GHz
10 mm – 1 mm Radio astronomy, high-frequency microwave radio relay
Terahertz
THz 12 300–30,000 GHz
1 mm – 90 um Terahertz imaging - a potential replacement for x-rays in some medical applications, ultrafast molecular dynamics, Condensed-matter physics, Terahertz time-domain spectroscopy, terahertz computing/communications
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