公开(公告)号：WO1989008853A1

公开(公告)日：1989-09-21

申请号：PCT/US1989001089

申请日：1989-03-16

Applicant: ALLIED-SIGNAL INC.

Inventor： ALLIED-SIGNAL INC. ,  BRANDAO, Ruy, L. ,  SPIRES, Randall, C. ,  KYRIAKOS, Constantinos, S. ,  JUGS, Andrejs

IPC: G01S03/02

CPC classification number: G01S13/9303

Abstract: A direction finding receiving system for use on a protected aircraft in which a signal from an ATCRABS transponder on an intruder aircraft is received has been described incorporating a four element interferometer type antenna array, reversing switches, individual receivers, a phase detector and a processor for processing the outputs of the phase detector. The invention overcomes the problem of correcting for the difference in phase delay of signals passing through the receivers.