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Old April 2nd 07, 01:27 PM posted to rec.radio.amateur.antenna
Richard Clark Richard Clark is offline
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First recorded activity by RadioBanter: Jul 2006
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Default Revisiting the Power Explanation

On Sun, 01 Apr 2007 19:04:49 GMT, Walter Maxwell
wrote:

Allright, Richard, then where is the load when there are two vertical radiators spaced 1/4 wl and fed in
quadrature, such that their individual fields are omni-directional in azimuth, but when the two fields
combine, a maximum greater than either of the individual fields is propagated in one direction, while a null
results in the opposite direction, negating the propagation of the individual fields in the direction of the
null. What is your explanation of the negation of the propagation of the individual fields when both radiators
are radiating equal EM energy? Are you still denying that interference is not the cause of the modification of
the resultant fields? So I repeat the question--where is the load in this case?


Hi Walt,

The load is anywhere you place it, obviously. We can even abstract
one radiator of these two radiators being a load for the other - and
through symmetry, the other way around. They obviously interefere
with each other. As I've offered, remove (or simply move) either and
the entire picture changes. If you want to add yet another, remote
load, that is fine. There is no limit to where it can reside. There
is no limit in the number of loads either. All loads reveal
interference, however, if you remove them, obviously there is no
interference.

Fields do not act one upon the other in linear space. The addition of
a load may present a new source of radiation. In that case, the new
mapping of wave action follows the load. This is demonstrated in
every yagi. Remove the load (or yagi element) and the specific
mapping changes, following the load.

73's
Richard Clark, KB7QHC