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  2. 1.25-meter band - Wikipedia

    en.wikipedia.org/wiki/1.25-meter_band

    The 1.25-meter, 220 MHz or 222 MHz band is a portion of the VHF radio spectrum internationally allocated for amateur radio use on a primary basis in ITU Region 2, and it comprises frequencies from 220 MHz to 225 MHz. [1] In the United States and Canada, the band is available on a primary basis from 222 to 225 MHz, with the addition of 219 to ...

  3. 6-meter band - Wikipedia

    en.wikipedia.org/wiki/6-meter_band

    6-meter band. A Yaesu FT-857D tuned to 50.125 MHz, the traditional 6-meter single-sideband calling frequency in the United States. [1] The 6-meter band is the lowest portion of the very high frequency (VHF) radio spectrum (50.000-54.000 MHz) internationally allocated to amateur radio use. The term refers to the average signal wavelength of 6 ...

  4. Shortwave bands - Wikipedia

    en.wikipedia.org/wiki/Shortwave_bands

    Shortwave bands are frequency allocations for use within the shortwave radio spectrum (the upper medium frequency [MF] band and all of the high frequency [HF] band). Radio waves in these frequency ranges can be used for very long distance (transcontinental) communication because they can reflect off layers of charged particles in the ionosphere and return to Earth beyond the horizon, a ...

  5. WARC bands - Wikipedia

    en.wikipedia.org/wiki/WARC_bands

    WARC bands. The World Administrative Radio Conference (WARC) bands are three portions of the shortwave radio spectrum used by licensed and/or certified amateur radio operators. They consist of 30 meters (10.1–10.15 MHz), 17 meters (18.068–18.168 MHz), and 12 meters (24.89–24.99 MHz). [1] [2] They were named after the World Administrative ...

  6. FM broadcast band - Wikipedia

    en.wikipedia.org/wiki/FM_broadcast_band

    The 4-meter band (70–70.5 MHz) amateur radio allocation used in many European countries is entirely within the OIRT FM band. Operators on this band and the 6-meter band (50–54 MHz) use the presence of broadcast stations as an indication that there is an "opening" into Eastern Europe or Russia. This can be a mixed blessing because the 4 ...

  7. Ultra-wideband - Wikipedia

    en.wikipedia.org/wiki/Ultra-wideband

    Ultra-wideband ( UWB, ultra wideband, ultra-wide band and ultraband) is a radio technology that can use a very low energy level for short-range, high-bandwidth communications over a large portion of the radio spectrum. [1] UWB has traditional applications in non-cooperative radar imaging. Most recent applications target sensor data collection ...

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