Waveband

See also: Band

A waveband defines a beach of Fréquence S which has similar properties:

  • in propagation
  • in penetration of the materials
  • …
or according to particular uses:

Each beach thus defined represents a spectrum frequencies, by analogy with the spectrum of the visible Lumière (see Specter radio frequency).

Each band can in its turn being cut out in sub-bands, by then refining the differences in properties among the frequencies.

As follows:

  • in terrestrial Television, the UHF are used for the Télédiffusion, but only a portion of this beach is actually used: the bands IV and V (470 to 860 MHz)
  • in parabola (satellite of TV) one use the bands C and Ku
  • in Radio FM, it is part of the VHF which is used: the Bande II (87,5 to 108 MHz)
  • the Radioamateur S have the authorization to emit on a score of bands, distributed on all the electromagnetic Specter, and in particular:
    • in HF, between 1,8 and 29,7 MHz
    • in VHF, between 144 and 146 MHz

See too

Random links:Lorenzaccio | Telégrafo y teléfono de Nipón | Labassère | Canton of Clermont-Ferrand-South-Is | Briosco | Fafe | Raymond,_Maine