METHOD AND APPARATUS FOR INTERROGATING AND IDENTIFYING FIXED OR MOVING TARGETS

Hijacked vehicles, or the like, are identified by illuminating a transponder mounted to the vehicle by a beam of microwave energy, e.g., from a helicopter flying over the traffic. The transponder includes non-linear diodes which reradiate a signal back towards the helicopter. Means are disclosed for modulating the return signal with a 16-bit identification code, each bit of which is transmitted as a 31-bit pseudo-random code.

  • Supplemental Notes:
    • Supersedes PAT-APPL-579 658-75. Availability: This Government-owned invention available for U.S. licensing and, possibly, for foreign licensing. Copy of patent available Commissioner of Patents, Washington, D. C. 20231 $0.50.
  • Corporate Authors:

    Department of the Army

    Pentagon Building
    Washington, DC  USA  20310
  • Authors:
    • Siverhus, A V
    • Matava, J A
    • Klose, D R
  • Publication Date: 1975-5-21

Media Info

  • Pagination: 8 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00166613
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: PAT-APPL-579-658 Patent, PATENT-4 015 259
  • Files: TRIS
  • Created Date: Oct 29 1978 12:00AM