公开(公告)号：WO2021240518A1

公开(公告)日：2021-12-02

申请号：PCT/IL2021/050617

申请日：2021-05-25

Applicant: ELBIT SYSTEMS EW AND SIGINT- ELISRA LTD.

Inventor： DASHT, Guy, Moshe ,  HARPAZ, Nir ,  ALUSH, Henry, Victor ,  LEVY, Israel

IPC: G01S3/72 ,  G01S3/48

Abstract: A radio-direction finding system (RDFS) comprises: at least one pair of substantially oppositely-positioned antenna arrays, each including directional antennas comprising at least one main antenna and one or more summation antennas; a plurality of individual radio- frequency (RF) receive paths, each of which are connected to a distinct main antenna only; and one or more common RF receive paths, each connected to a distinct pair of substantially oppositely-positioned summation antennas. The RDFS can analyze main output signals that are received from the individual RF receive paths to provide a coarse determination of a given direction from which a transmitting entity is transmitting radio signals, and provide a fine determination of the given direction utilizing one or more common output signals, received from one or more common RF receive paths, and a selected main output signal, the common output signals and the selected main output signal being associated with the coarse determination.