Interferometer based Direction-Of-Arrival Detection System

This paper presents an interferometer-based direction of arrival (DoA) detection system. Unlike conventional six-port based phase discriminators, the proposed architecture uses only three couplers in combination with three receiving antennas. The modeling and analysis of the DoA detection scheme prove that it is possible to improve the measurement accuracy by increasing the inter-element distance between the receiving antennas. The proposed scheme is suitable for use at 5G millimeter wave frequencies as the wavelength is less than one centimeter and many antennas could be easily integrated within the receiver.