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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 |
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