Interferometric angle-of-arrival estimation using a simple weight network

This paper presents a method to estimate the Angle of Arrival (AOA) for incident waves, using an RF-based interferometric monopulse technique. We used an AOA network to yield a weight function for the received signals, in which the phase of the received signals for each element is delayed in accordance with the coordinate of the elements using the differing lengths of microstrip transmission lines. Based on electromagnetic field analysis and experimental results, it is clarified that the proposed method achieves a high degree of accuracy for AOA estimation.