Accession Number : ADD005625

Title :   Two-Axis Motion Compensation for AMTI.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : AP Rhys,Tomos L

Report Date : 17 Oct 1978

Pagination or Media Count : 12

Abstract : A displaced-phase-center antenna technique which compensates accurately for the motion of an airborne radar system in both the boresight direction of the antenna and in the direction normal to the boresight is discussed. An antenna system comprising a broadside array of endfire arrays forms four receive beams which are displaced from each other in both the boresight direction and in the direction normal to the boresight. These four beams are used to produce signals which correspond to signals from two receive beams with phase centers having a separation equal in magnitude and direction to the aircraft's motion during the interpulse period. A signal scattered from a fixed object on a first transmitted pulse and received in one of the two receive beams will have the same phase characteristic as a signal scattered from the same fixed object on a subsequent pulse and received in the other receive beam. Upon proper delay of the first received signal, the returns from the fixed object may be cancelled. (Author)

Descriptors :   *Patents, *Moving target indicators, Image motion compensation, Aircraft antennas

Subject Categories : Test Facilities, Equipment and Methods
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE