Simulation of abnormally large errors of scanning ground radar location by the phase direction finder

Results of measuring amplitudes and phases difference of signals emitted by a three-centimeter range pulse radar and received by spaced antennas are analyzed. Bipolar spikes of the phase difference, leading to abnormally large errors of the phase direction-finding method, are observed at minimum of the received signals amplitude depending on angular position of the directional radar antenna in the horizontal plane. The cause of the spikes is explained by the digital simulation of the wave propagation along the terrestrial paths.