Ron J wrote:
Hey all,
I'm still skeptical about this formula:
Field Strength (uV/m) = 10 ^ ( (107 - |dBm| ) / 20 )
Is this valid? I saw this formula somewhere and jotted it down.
Thanks!
dBm is a measure of power, and the field strength as a function of power
is going to depend on antenna characteristics.
The equation you have is a pretty direct conversion between power in dBm
to voltage, with a magic proportionality factor (the 107) buried in the
exponent.
So I suspect it's a valid function, but only for one type of antenna.
--
Tim Wescott
Wescott Design Services
http://www.wescottdesign.com