



fA iA lA ^A 



fA lA 



^A A liA liA IfA IB IfA I^A I^A 2A 



4A 



K 







^t(O)(0 



a^ 00 



Fig. 1 — Directive amplitude diagrams for an array of two antennae; separation in wave-lengths (X) along the top, phase difference in periods (7") at the left 



