polarised RF radiation

Discussion in 'Wireless & RF Design' started by whale, Nov 29, 2009.

  1. whale

    Thread Starter Active Member

    Dec 21, 2008
    111
    0
    What is polarised rf radiation?

    Usually i use to realise radio wave as a electromagnetic field between antana terminal and ground.is there different types of radio waves transmission?(not the type of modulation).

    How to make a normal radio wave to polarised radio wave?

    Thank you.
     
  2. KL7AJ

    AAC Fanatic!

    Nov 4, 2008
    2,040
    287
    All radio waves have polarization of some sort. A standard dipole has polarazation that is defined as being parallel to the direction of the wire. If the wire is horizontal, for instance, the electric field polarization is horizontal.


    Ground propagated signals, such as A.M. and longwave broadcasting are verticallly polalrized.

    eric
     
  3. ELECTRONERD

    Senior Member

    May 26, 2009
    1,146
    16
    When referring to antennas, their polarization is considered relative to ground. Also, it is important to distinguish electric and magnetic fields (resulting in electro-magnetic field). If someone said that their antenna was vertically polarized because the magnetic field was vertical, this wouldn't be true. The polarization is based on the electric field, not the magnetic field. If you look at any antenna, the polarization can be determined based on the orientation of the elements.

    Austin
     
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