Abstract
In this paper, a novel array antenna for DOA estimation system is proposed. The proposed array antenna consists of patch elements and a both-sided feed line circuit including a magic-T. In the DOA estimation system, a arrival angle is obtained by a sum signal and a differential signal. By using the magic-T in the proposed array antenna, the sum and differential signals can be obtained easily with the simple structure. The characteristics of the proposed antenna are investigated experimentally.
