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convert dBm to watt/sq meter

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  • convert dBm to watt/sq meter

    Dear all,
    I want to convert dBm to watts/ sq meter, V/m & Amp/m. pl help.

  • #2
    Re: convert dBm to watt/sq meter

    quick reply

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    • #3
      Re: convert dBm to watt/sq meter

      Originally posted by yogesharya View Post
      Dear all,
      I want to convert dBm to watts/ sq meter, V/m & Amp/m. pl help.
      dBm is dB re 1 milliwatt. If power output of something is p dbm, then it is 10^(p/10) milliwatts.

      If you radiate that power from an antenna, you need to know the distance from the antenna and the directionality of the antenna to get field strength in W/m. At a distance R from an isotropic antenna (they don't really exist) radiating P watts, the field strength is P/(4pi*R) watts per square meter. For real antennas, in the forward direction, multiply by antenna gain (recognize the gain comes from restricting the radiation to a narrow beam, to radiate more in one direction requires radiating less in all others)

      We could probably help more with more specifics of what you are trying to do.

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      • #4
        Re: convert dBm to watt/sq meter

        9 watt/Meter Square = how much dbM??

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