Apparatus and method for authenticating object in electronic device

Abstract

In accordance with an aspect of the disclosure, an electronic device is provided. The electronic device comprises an antenna array, a wireless communication module electrically connected to the antenna array and configured to form directional beams through the antenna array, at least one processor operatively connected to the wireless communication module; and a memory operatively connected to the at least one processor. The memory stores instructions causing the at least one processor to perform a plurality of operations comprising: transmitting a sequence of first directional beams having a first beam width to scan first regions having a first size through the antenna array, receiving a sequence of first reflected waves generated by reflection of the sequence of the first directional beams from an object through the antenna array, transmitting a sequence of second directional beams having a second beam width narrower than the first beam width to scan second regions, which are included in the first regions and have a second size smaller than the first size, through the antenna array based on at least a portion of the received sequence of the first reflected waves, receiving a sequence of second reflected waves generated by reflection of the sequence of the second directional beams from the object through the antenna array, and authenticating the object based on at least a portion of the sequence of the second reflected waves.