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transmission distance in radio communication

Discussion in 'General Electronics Discussion' started by bhuvanesh, Jun 18, 2014.

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  1. bhuvanesh

    bhuvanesh

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    0
    Aug 29, 2013
    i have bought all the components to make radio transmitter and receiver.but i am week at basics i dont know which factor cause effect on transmission.i mean which decides transmission range
     
  2. Harald Kapp

    Harald Kapp Moderator Moderator

    10,370
    2,263
    Nov 17, 2011
    There are many factors:
    • transmitted power
    • gain of transmittting antenna (including e.g. directionality)
    • losses during transmission (attenuation by obstacles like walls, humidity etc.)
    • gain of receiving antenna
    • sensitivity of receiver
    • robustness of the transmission's coding scheme (AM, FM, QAM, ...)
    • robustness of any higher layer coding (e.g. use of errror correcting codes etc.)
    • accepted signal-to-noise ratio of the received and decoded signal
     
    KrisBlueNZ likes this.
  3. davenn

    davenn Moderator

    13,654
    1,888
    Sep 5, 2009
    losses in feed lines
    and last but not least
    the frequency used ( which probably should be at the top of the list)


    Dave
     
  4. shrtrnd

    shrtrnd

    3,767
    487
    Jan 15, 2010
    I'm kind of assuming this is an inside your home device?
    A liitle more specific information would help.
    Are you working a signal device like an on-off switch, or a communications device, like your own short-range FM radio station?
     
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