Accession Number : AD0808296

Title :   PASSIVE BEACON TECHNIQUES.

Descriptive Note : Final rept. 1 Jul 65-3 Mar 66,

Corporate Author : WESTINGHOUSE ELECTRIC CORP BALTIMORE MD SURFACE DIV

Personal Author(s) : Shrank, H. E. ; Grove, R. D. ; Mattern, J.

Report Date : JAN 1967

Pagination or Media Count : 224

Abstract : This document describes the work performed on an investigation entitled Passive Beacon Techniques, which is aimed at a feasibility demonstration of the hollow Helisphere reflector as a ground marker beacon for use with low-flying airborne radar. The investigation included the design, construction and test of a 60 inch diameter inflatable Helisphere passive beacon, capable of producing modulated (coded) radar echoes with omni-azimuth coverage over better than an octave bandwidth in the X-band to Ku-band region. Also included was the modification of an AN/APS-42 radar set to permit detection and recognition of the coded beacon returns, and to display them as enhanced blinking echoes on the radar indicator. This final report includes a discussion of the advantages of passive beacons compared with active transponders and a consideration of the system aspects of coded ground marker beacons. Also presented are the design and evaluation tests of the light-weight, man-transportable Helisphere beacon model built for this study, together with a description of the signal processor circuits designed and built for use with the AN/APS-42 radar. The flight test program for evaluating the beacon system is discussed.

Descriptors :   (*RADAR BEACONS, PASSIVE SYSTEMS), (*RADAR CORNER REFLECTORS, SPHERES), (*RADAR CROSS SECTIONS, PASSIVE SYSTEMS), X BAND, K BAND, TARGET RECOGNITION, RANGE(DISTANCE), AIRBORNE, RADAR CLUTTER, PORTABLE EQUIPMENT, DATA PROCESSING, INFLATABLE STRUCTURES, OMNIDIRECTIONAL ANTENNAS, LOW ALTITUDE.

Subject Categories : Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE