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  United States  20310
• Authors:
  • Siverhus, A V
  • Matava, J A
  • Klose, D R
• Publication Date: 1975-5-21

Media Info

• Pagination: 8 p.

Subject/Index Terms

• TRT Terms: Ground vehicles; Helicopters; Hijacking; Law enforcement; Lighting; Microwaves; Moving target indicators; Patents; Radar; Radio transmitters; Theft; Tracking systems; Transponders; Trucks
• Uncontrolled Terms: Airborne
• Old TRIS Terms: Moving targets; Targets
• Subject Areas: Aviation; Motor Carriers; Security and Emergencies; Vehicles and Equipment;

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