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#1
12-03-2010, 10:54 PM
 yogesharya Junior Member Join Date: Dec 2010 Posts: 2 Rep Power: 0
convert dBm to watt/sq meter

Dear all,
I want to convert dBm to watts/ sq meter, V/m & Amp/m. pl help.
#2
12-03-2010, 10:54 PM
 yogesharya Junior Member Join Date: Dec 2010 Posts: 2 Rep Power: 0
Re: convert dBm to watt/sq meter

#3
12-04-2010, 03:12 AM
 JohnS Moderator Join Date: Dec 2007 Location: SE Michigan, USA Posts: 9,547 Rep Power: 19
Re: convert dBm to watt/sq meter

Quote:
 Originally Posted by yogesharya 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/m². At a distance R from an isotropic antenna (they don't really exist) radiating P watts, the field strength is P/(4pi*R²) 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.
#4
08-07-2012, 01:55 AM
 Unregistered Guest Posts: n/a
Re: convert dBm to watt/sq meter

9 watt/Meter Square = how much dbM??

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