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[]
[null," Alpha = antenna excitation phase difference. Gamma (differential phase delay due to propagation path difference) = [Beta x d x cos(Theta)].  Beta = (2*Pi)/(Lambda), d = distance between the antennas, Theta = direction angle. Assume Eo as the reference: Eox = 1, Eoy = 0. Then E1x = k*cos(Delta), E1y = k*sin(Delta). mod(E) = sqrt{[1+k*cos(Delta)]^2 + [k*sin(Delta)]^2}, arg(E) = arctan{[k*sin(Dealta)}/[1+k*cos(Delta)]}.  Reference: Kraus:Antennas, 4-22"]
[]
[null,"Given:  2 omnidirectional, co-polarized, coherently-excited antennas, \"o\" and \"1\". "]
[null,"At a large distance they produce field-strength vectors Eo and E1: mod(E1) =~ mod(kEo) arg(Eo) = 0, arg (E1) = Delta; Delta = Alpha + Gamma."]