Adaptive antenna arrays usually function in radio wave multipath propagation, occurred, for example, due to reflection from local objects and underlaying surface. In frequency identity of microwave receiving channel paths the multipath effect is one of the most serious factors limiting the efficiency of interference compensation. The latter depends on correlation degree of direct and reflected interference radio waves [1] which is defined not only by the relation of interchannel time delay and correlation interval but by radio wave reflection and reception conditions.

The object of this report is to analyse the influence of interference radio waves reflected from underlaying surface on efficiency measures of interference one-channel autocompensator at small elevation angles, i.e., mirror reflection is the prevailing one. Reception conditions are simulated by giving directed properties and heights of antenna size of main and compensating channels, having identical relative passbands.