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Band III is the name of the range of radio frequencies within the very high frequency (VHF) part of the electromagnetic spectrum from 174 to 240 megahertz (MHz). It is primarily used for radio and television broadcasting. It is also called high-band VHF, in contrast to Bands I and II.
The radio spectrum is the part of the electromagnetic spectrum with frequencies from 3 Hz to 3,000 GHz (3 THz).Electromagnetic waves in this frequency range, called radio waves, are widely used in modern technology, particularly in telecommunication.
Networks on LTE bands 1, 3 (LTE-FDD) are suitable for roaming in ITU Regions 1, 3 and partially Region 2 (e.g. Costa Rica, Venezuela, Brazil and some Caribbean countries or territories. Networks on LTE band 20 (LTE-FDD) are suitable for roaming in ITU Region 1 only. Networks on LTE band 5 (LTE-FDD) are suitable for roaming in ITU Regions 2 and 3.
44–51, 54–68 MHz: Band I Television (channels 1–3) 87.5–108 MHz: Band II Radio; 118–137 MHz: Airband for air traffic control, AM. 108–117.975 MHz: Air navigation beacons VOR and ILS; 121.5 MHz is an emergency frequency; 144–148 MHz: Amateur radio 2-meter band; 156–162.2 MHz: Marine radio; 174–230 MHz: Band III Television ...
The other is Frequency Range 2 (FR2), [2] which includes frequency bands from 24.25 GHz to 71.0 GHz. In November and December 2023, a third band, Frequency Range 3 (FR3), [ 3 ] covering frequencies from 7.125 GHz to 24.25 GHz, was proposed by the World Radio Conference ; as of September 2024, this band has not been added to the official standard.
High frequency (HF) is the ITU designation [1] [2] for the band of radio waves with frequency between 3 and 30 megahertz (MHz). It is also known as the decameter band or decameter wave as its wavelengths range from one to ten decameters (ten to one hundred meters).
Radio frequency (RF) is the oscillation rate of an alternating electric current or voltage or of a magnetic, electric or electromagnetic field or mechanical system in the frequency [1] range from around 20 kHz to around 300 GHz.
International amateur satellite frequency allocations Range Band Letter [a] Allocation [11] Preferred sub-bands [b] User status [11] Notes [11] HF: 40 m: 7.000 – 7.100 MHz: Primary 20 m: 14.000 – 14.250 MHz: Primary 17 m: 18.068 – 18.168 MHz: Primary Entire amateur radio band 15 m: H 21.000 – 21.450 MHz: Primary Entire amateur radio ...