A comparison has been made of the noise immunity of local source direction finding algorithms with linear scalar and vector–scalar antennas using different methods of processing signals from pressure receivers and oscillatory velocity receivers. Calculations were carried out for equidistant antennas with equal apertures and equal interelement distances. It has been calculated and experimentally shown that vector–scalar antennas have a significantly smaller side field than scalar antennas, and the additional maximum, which is formed only at “oblique” reception angles, is three to five times smaller than the “mirror” lobe of scalar antennas. Good agreement between the experimental and calculated spatial spectra was established for all directions towards the source. A computational and experimental justification for the use of vector–scalar antennas for unambiguous direction finding of a noise source, including at oblique angles of incidence of the wave front, both “on the foot” and in the antenna towing mode, is presented. It is shown that receiving signals using vector–scalar antennas ensures separation of signals “on the left and right sides” and separation of sources located “in the front and rear hemisphere.”
Glebova et al. (Mon,) studied this question.