Poynting-vector based method for determining the bearing and location of electromagnetic sources

Patent · Tue Oct 21 00:00:00 EDT 2008

OSTI ID:957010

Simons, David J ^[1]; Carrigan, Charles R ^[2]; Harben, Philip E ^[3]; Kirkendall, Barry A ^[4]; Schultz, Craig A ^[5]

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1. Modesto, CA
2. Tracy, CA
3. Livermore, CA
4. Golden, CO
5. Danville, CA

A method and apparatus is utilized to determine the bearing and/or location of sources, such as, alternating current (A.C.) generators and loads, power lines, transformers and/or radio-frequency (RF) transmitters, emitting electromagnetic-wave energy for which a Poynting-Vector can be defined. When both a source and field sensors (electric and magnetic) are static, a bearing to the electromagnetic source can be obtained. If a single set of electric (E) and magnetic (B) sensors are in motion, multiple measurements permit location of the source. The method can be extended to networks of sensors allowing determination of the location of both stationary and moving sources.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-48
• Assignee: Lawrence Livermore National Security, LLC (Livermore, CA)
• Patent Number(s): 7,440,858
• Application Number: 11/404,609
• OSTI ID: 957010
• Country of Publication: United States
• Language: English