On Fri, 20 Apr 2007 06:49:46 GMT, Owen Duffy wrote:

Richard Clark wrote in
A practical example of this is that an omni directional receiving
antenna may be located at a point where a direct wave and a
reflected wave result in very low received power at the antenna,
whereas a directional antenna that favours one or other of the waves
will result in higher received power. This indicates that both waves
are independent and available to the receiving antenna, the waves do
not cancel in space, but rather the superposition occurs in the
antenna.

As Roy did not quote any of your material, I must presume this. Am I
correct?

Yes

Hi Owen,

And you have already allowed that superposition does not fail. Thus
there must be some other failure to be found in the choice of antenna.
From other correspondence, it is asserted that a gain antenna, by
virtue of its size, cannot be placed in null space (that point wherein
all contributions of energy sum to zero) which is planar and
equidistant between sources (there being two of them for the purpose
of discussion).

Have I described this accurately?

73's
Richard Clark, KB7QHC