"Cecil Moore" wrote in message
...
Ptotal = P1 + P2 + 2*SQRT(P1*P2)*cos(A)

So... let's see... my two 1/2W antennas now, in the "preferred" location, get
you... 0.5+0.5+2*sqrt(0.5*0.5)*cos(0) = 2W... yep, same as the field strength
analysis. Cool!

Presumably you could demonstrate all this with a "ripple tank" (the kind with
water used back in high school physics) -- set things up so that, in a
preferred direction, the wave height is 1.414 even though the wave height made
by each "radiator" in isolation is 0.707.

Thanks Cecil,
---Joel