Analysis of Distance Information Error Between Phase Centers in Phase Comparison Direction Finding Methods

In this paper, the effect of the distance information error between phase centers on the accuracy of monopulse phase comparison direction finding methods used in electronic support systems is analyzed. If the path difference causing the phase difference is greater than half the wavelength of the signal, ambiguity occurs in the phase comparison method . The ambiguity in the phase comparison method can be solved by SODA method using artificial aperture or hybrid method using the amplitude comparison. In this study, the robustness of phase comparison methods accuracy to distance information error between phase centers was analyzed with errors having different standard deviation values at 180 degrees viewpoint.