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miniature antennas

Discussion in 'Electronic Basics' started by jw, Sep 26, 2004.

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  1. jw

    jw Guest

    Hi,

    I have little knowledge about antennas, so I need some direction.

    I am needing to find tiny sized antennas for sale.

    Can anyone direct me to companies that sell such items for say AM and FM
    bands, or maybe in the 1-2 GHz range.

    This is for a very low power, very short range application.

    I searched for this and found some loop type antennas, but I these are too
    big. It seems there must be some nicer smaller antennas available now. I
    have found descriptions of the dime types also, but are these in production?

    thx, jw
     
  2. Clarence

    Clarence Guest

    How small did you want?

    Normal simple antenna.

    Piece of wire, length = 234/Frequency in MHZ (meters) Over a ground or
    counterpoise. (Very good but not practical for AM Broadcast band.)

    234 / 1000 MHZ = 234mm
    234 / 2000 MHZ = 117mm

    Make the ground at least 10% larger.

    The Dipole can be bent. It does not have to be perfectly straight.
     
  3. Have you looked into printed circuit antennas?
    http://www.mwrf.com/Articles/ArticleID/5511/5511.html
     
  4. jw

    jw Guest

    I'm looking for something really tiny - 5mm square would be nice. It looks
    like the dime-type antenna could be this small.

    I forgot to mention, this is for a transmit only application, no reception
    required.

    TIA, jw
     
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