Accession Number : AD0913556

Title :   Technical Evaluation of Electronically Scanned TACAN Antennas.

Descriptive Note : Final rept. Aug 72-Jun 73,

Corporate Author : NAVAL ELECTRONIC SYSTEMS TEST AND EVALUATION FACILITY ST INIGOES MD

Personal Author(s) : Himmelheber, P. A.

Report Date : 28 SEP 1973

Pagination or Media Count : 32

Abstract : Two electronically scanned TACAN antennas were evaluated at Naval Electronic Systems Test and Evaluation Facility (NESTEF) to determine performance characteristics, monitoring techniques, sector scanning capabilities, RF losses, and azimuth accuracy degradation due to unwanted variations in the RF current distribution. Antenna range tests and flight tests were conducted on each antenna. Test results indicate that a single electronically scanned antenna can generate an acceptable TACAN signal over the entire TACAN frequency band; however, due to the physical characteristics, the azimuth accuracy does not equal that of a mechanical rotating antenna. In addition, monitoring and maintenance techniques will have to be expanded. It is recommended that the electronically scanned antennas undergo further tests under the conditions outlined in this report prior to being considered for service use.

Descriptors :   (*ANTENNA ARRAYS, ELECTRONIC SCANNERS), (*DIRECTION FINDING, ACCURACY), (*RADIO NAVIGATION, ERRORS), RADIO COMPASSES, MECHANICAL SCANNING, MAINTENANCE, ATTENUATION, DIPOLE ANTENNAS, DIGITAL SYSTEMS, ELECTRONIC SWITCHES, SWITCHING CIRCUITS, ANTENNA FEEDS, LOGIC CIRCUITS, AMPLITUDE MODULATION, CYLINDRICAL BODIES, FLIGHT TESTING, FAILURE(ELECTRONICS), AVIATION SAFETY, AZIMUTH.

Subject Categories : Electrical and Electronic Equipment
      Direction Finding

Distribution Statement : APPROVED FOR PUBLIC RELEASE