[Elecraft] Re: RF radiation review

[lhlousek]

<<I would guess (rf levels probably decrease
in a 1/(rsquared) relationship to distance(r) from wire).>>

Only in the far field does the radiation fall off as 1/(rsquared). Close to an antenna it falls off as 1/r.  However,
exposure limits pertain to field strength not radiation level and, close to the antenna, radiation is not directly
related to field strength.  The E (electric) and H (magnetic) fields need to be calculated and considered separately.
For instance: The E fields can be very high and exceed exposure limits at the ends of elements whereas the H fields
would be rather week. Near the feedpoint or a loading coil, the H fields might exceed exposure limits while the E field
would not.

EZNEC provides a near field calculator that will calculate both E and H fields at specified points near an antenna.
These can be compared directly to the regulatory limits after allowing for the duty cycle of the transmission.

Lou W7DZN