Antenna extender for sim900a module

Discussion in 'General Electronics Chat' started by aamirali, Aug 11, 2014.

  1. aamirali

    Thread Starter Member

    Feb 2, 2012
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  2. alfacliff

    Well-Known Member

    Dec 13, 2013
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    an antenna length of 1 mn would not work, the wavelength is much shorter. 900 mhz antenna is about 35 cm, and 1800 mhz is about 17.5 cm.
    also, if you are in the US, it woluld be illegal to modify the antenna on the module.
     
  3. aamirali

    Thread Starter Member

    Feb 2, 2012
    415
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    1. then what is the maximum antenna lenght I could increase.

    2. I have to modify the design for it. but current antenna is very small

    Edit: as you had mentioned, is the actual antenna is maximum lenght I could have
     
  4. bertus

    Administrator

    Apr 5, 2008
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