Radio Frequency

Division Of Radio Frequency (Spectrum Radio Communication Frequencies)

         Radio Frequency  An electromagnetic wave with frequencies from 3Hz to 3000GHz (3THz). Radio waves are widely used in telecommunications. And in use must no interference. It is strictly controlled by the laws of each country. It is coordinated by a middle name organization. International Telecommunication Union (ITU)

      Radio Frequency Allocation. It has been allocated by the ITU for use in different telecommunications technologies. The use of radio frequencies must be authorized. And some popular radio frequencies. Like the frequency used in the phone. Frequency Band Radio Service Or television station. More than 40 telecommunication services are controlled by the ITU. Must request permission and pay rent or concession. Can be used. The ITU has been divided by the frequency of usage. Or the same purpose. It is divided into 12 Frequency bands.

No.
AcronymFrequency bandwavelength
1ELF3–30 Hz10,000km – 100,000km
2SLF30 Hz - 300 Hz1,000km – 10,000km
3ULF300 Hz - 3000 Hz100km – 1,000km
4VLF 3 kHz - 30 kHz 10km - 100 km
5LF 30 kHz - 300 kHz 1 km - 10 km
6MF 300 kHz - 3000 kHz 100m - 1000m
7HF3 MHz to - 30 MHz10m - 100m
8VHF30 MHz - 300 MHz1m - 10m
9UHF300 MHz - 3000 MHz10cm - 100cm
10SHF3 GHz - 30 GHz1cm - 10cm
11EHF30 GHz - 300 GHz1 mm - 10mm
12THF300 GHz - 3000 GHz 0.1mm - 1mm

Table 1 Table of ITU Radio Bands
 

Name of Frequency BandAcronym

ITU band

Frequency RangewavelengthUsage Condition
Extremely low frequencyELF13–30 Hz100,000 – 10,000 kmCommunication with the submarine
Super low frequencySLF230–300 Hz10,000km – 1,000kmCommunication with the submarine
Ultra Low FrequencyULF3300–3,000 Hz1,000km – 100kmUnderwater Communication, Internal Mining Communication
Very Low FrequencyVLF43–30 kHz100km – 10kmNavigation, time signal, underwater communication, wireless heart rate monitor, geophysical
Low FrequencyLF530–300 kHz10km – 1kmNavigation system, time signal, AM-radio, RFID, amateur radio
Medium FrequencyMF6300–3,000 kHz1km – 100mMedium-Wave AM radio, amateur radio, avalanche alert
High FrequencyHF73–30 MHz100m – 10 mRadio SW, radio CB, amateur radio, radio aviation, radar, automatic link link
Very High FrequencyVHF830–300 MHz10m – 1mFM radio, television, ground-to-air communications And between aircraft, terrestrial communications to marine mobile stations, amateur radio, weather reports, weather
Ultra High FrequencyUHF9300–3,000 MHz1m – 10cmRadio, microwave, microwave, radio astronomy, mobile phone, GPS, wireless LAN, bluetooth, sigma, amateur radio, satellite radio, remote control, GMRS radio, FRS radio, ADS-B automatic aircraft
Super High FrequencySHF103–30 GHz10cm – 10mmMicrowave communication, radio astronomy, DSRC technology, radar, satellite image transmission and transmission, DBS broadcasting, amateur radio, satellite radio, wireless LAN
Extremely High FrequencyEHF1130–300 GHz10mm –1mmMicrowave radios, microwaves, direct wave energy, millimeter wave scanners, wireless LAN (802.11ad)
TeraHertz / Tremendously High FrequencyTHz, THF12300–3,000 GHz1mm – 0.1mm

Medical imaging to replace x-rays, ultrafast  molecular dynamics, physics condensation, spectroscopy, domain terrain, TeraHertz computing / communications, remote sensing, amateur radio

Table 2. Table of ITU Radio Bands & Example Uses