A system to accurately and consistently read Radio-Frequency Identification (RFID) information from RFID tags placed upon objects. The system features a moving antenna or antenna array pointed toward a target detection zone. In some embodiments, a portal is constructed having electromagnetic shielding properties and containers carrying RFID tagged objects are loaded through the portal. In other embodiments, multiple antenna arrays are installed within the portal. Movement of antenna arrays may be provided using a non-electronic motor or actuator to suppress potential electromagnetic interference. A method of accurately and consistently reading RFID information from RFID sources by providing the antenna(s) and portal passing objects having RFID tags proximate the antenna(s) and through the portal, and optimizing the angle by which the antennas and/or antenna arrays may best read the RFID signals upon a target detection zone via movement of the antenna(s).