On Apr 16, 8:35 pm, Cecil Moore wrote:

No they don't. If the waves themselves changed, then their resultant
superposition would also change. It's a completely unfounded notion,

If what you say is true, then if we measure field strengths
far enough away from an antenna to get outside the range
of interference, then all antennas are isotropic.

"Outside the range of interference"? Yes, please call NASA and tell
them about that. :-)

ac6xg