On Fri, 15 Aug 2003 14:57:46 -0500, "William E. Sabin"
sabinw@mwci-news wrote:


The far-field E and H fields are different from
the near-field E and H fields. What is going on?


Hi Bill,

The continuum of the structure presents a delay (by "moments" to use
the vernacular of MOM) that combines with all "moments" of the
previously existing and "near" separated field(s) to cause local
free-space media fluctuations in Z. At a greater distance, such
differences become trivial.

The local fields present a non-homogenous free-space media, some of
which is transparent, some of which is reflective, much of it
somewhere in between. The antenna distorts the medium it resides in
presenting much the same effect as gravity distorting the space-time
continuum. This is a leap of faith, certainly, but offers a
visualization that may be familiar. In optics it would be something
like dispersion where the structure is smaller than the wavelength
exciting it.

73's
Richard Clark, KB7QHC