公开(公告)号：EP4428574A1

公开(公告)日：2024-09-11

申请号：EP24156038.2

申请日：2024-02-06

Applicant: Eagle Technology, LLC

Inventor： LIEB, Donald A. ,  RILEY, Robert ,  TAYLOR, Robert M. ,  SPEED, Kerry T. ,  DURHAM, Timothy E.

IPC: G01S13/90

CPC classification number: G01S13/904 ,  G01S13/225

Abstract: A synthetic aperture radar (SAR) (20) for a flight vehicle (10) may include an elongate phased array antenna (22) oriented with a long axis in an elevation direction (30). The elevation direction (30) is normal to a direction of flight (32) of the flight vehicle (10). A transmitter (24) is coupled to the elongate phased array antenna (22), and a receiver (26) is coupled to the elongate phased array antenna (22). A controller (28) is coupled to the transmitter (24) and receiver (26) and is configured to generate temporally alternating sets of receive beams (52, 54) for respective swaths to be used to form a SAR image across a surface (50) below the flight vehicle (10). The same center frequency is used to create consistent SARs for all swaths, allowing for coherent combination between subsequent passes over the same swath.