Re: Wire Length (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Gerry Reynolds <greynolds@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Wed, 20 Dec 2006 12:23:10 -0800
From: Ed Phillips <evp@xxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Wire Length (fwd)

In the physical example of a radio antenna, induced eddy currents in the 
conductor are known to be associated with broad-band RF noise.  As long as 
the wave equation according to Laplace is used while adhering to Maxwell's 
theory at the same time, this can be easily explained.  The problem arises 
in the way that Maxwell's equations alone handle the E-field in the 
dielectric or air directly adjacent to the circulating eddy currents.  While 
the motion of the eddy currents is described as being rotational, the 
associated E-field is not described by Maxwell as being rotational.  A 
contradiction arises because the antenna noise exists in the region adjacent 
to the conductor, but if the Maxwell description is applied, then the 
antenna noise cannot exist.  This contradicts actual experience, since 
measurements show that all antennas do produce some noise."

	Care to cite some references regarding the source of the various "it is known" statements re: INTERNAL RF noise in antennas?  Is this related to something other than the intrinsic thermal noise due to the finite RF resistance of the conductors?

Ed