Accession Number : AD0889303

Title :   Tracking Mode Operation of a CDAA RDF System.

Descriptive Note : Technical rept. no. 2,

Corporate Author : ILLINOIS UNIV AT URBANA RADIO RESEARCH LAB

Personal Author(s) : Ernst, Edward W.

Report Date : SEP 1971

Pagination or Media Count : 29

Abstract : The large aperture CDAA RDF system can be operated in several ways. One of them is in the 'tracking mode' which uses information derived from the received output to align the beam of the array in the direction from which the signal arrives. The difference in phase between the two halves of the array is the signal characteristic used to rotate the array to the desired azimuth. The difference between the azimuth to which the array is aligned and the signal azimuth is indicated by the phase difference. Thus, a good approximation to the signal may be determined even for those signals for which the azimuthal angle of arrival changes rapidly. (Author)

Descriptors :   (*DIRECTION FINDING, ANTENNA ARRAYS), (*RADIO SIGNALS, DIRECTION FINDING), RADIO EQUIPMENT, TRACKING, ANGLE OF ARRIVAL, SCANNING, PHASE SHIFT CIRCUITS, ALIGNMENT.

Subject Categories : Direction Finding
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE