A calibration procedure for two-antenna direction of arrival finding systems

Under the background of satellite communication, this paper presents a different method of finding the direction of a signal by using a system of two identical pyramidal horn antennas with frequency selective surfaces type structures applied in the horn aperture. Based on a calibration in an anechoic chamber, in the far field zone, a correction factor was calculated to compensate the effects of the individual radiation pattern asymmetry, the discrepancies between the characteristics of the antennas, and mutual coupling.