ORIGINAL MESSAGE:

Roy Lewallen wrote:

That's an interesting point. Suppose you have a two-element driven
array with the elements spaced a quarter wave apart and fed 90
degrees out of phase. This produces a cardioid pattern, which has a
deep null. Is the element toward the direction of the null
"reflecting" and the other one "directing"? If so, what are they
"reflecting" and "directing"?



*********** REPLY SEPARATOR ***********

Trying to bridge the gap between engineering and English, I would
suggest this analogy:

A mirror reflects light energy fed to it, while a light bulb takes
electricity and turns it into light.

Either a mirror or a light bulb can be used to send light in a desired
direction, but only one is "reflecting" that energy in the usual sense
of the word. Likewise, only the mirror is "re-radiating" energy, much
like a yagi's reflector does.

The analogy is not perfect but that's what the words mean to me.

73, Bill W6WRT