Pecularities of adopted antenna systems consisting of independent loaded vibratiors

We study the physical features of systems which consist of independently loaded dipoles. An example of such a system is rectenna (rectifying antenna). It is shown that the characteristics of these systems coincide with the transmitting characteristics of a system of the same dipoles with mutually incoherent excitation. The system of dipoles with independent loads has a relatively low directionality because of the absence of coherent amplification or reduction of the field in the appropriate directions, which is typical for systems with coherent excitation of the dipoles.