VP COMMUNICATIONS LINE PROJECT

The concept of a variable parameter (VP) communications line is introduced. The VP concept permits control of the location and amount of electromagnetic radiation escaping from a transmission line to a nearby receiver. A specific implementation of the VP concept, utilizing ferrite loaded apertures activated by an external magnetic field, is studies. A coupling ration (defined as the ration of the radiated power in the 'ON' or activated condition to the radiated power in the 'OFF' or unactivated condition) of 20 dB is observed in agreement with theoretical predictions. The incorporation of the VP concept in certain existing transmission lines is analyzed. (Author)

• Supplemental Notes:
  • Report on High-Speed Ground Transportation Systems Engineering Study.
• Corporate Authors:

  TRW Systems Group

  Washington Operations
  McLean, VA  United States  22101
• Authors:
  • Rebsch, D L
• Publication Date: 1970-7

Media Info

• Pagination: 68p* p.

Subject/Index Terms

• TRT Terms: Control; Electromagnetic fields; Electromagnetic wave propagation; Electromagnetic waves; Ferrites; High speed ground transportation; Microwave devices; Relays (Electricity); Waveguides
• Old TRIS Terms: Irises mechanical; Magnetic field; Microwave relay systems; Variable parameter communication lines
• Subject Areas: Materials; Railroads;

Filing Info

• Accession Number: 00039235
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: 06818-W010-RO-00 Final Rpt
• Contract Numbers: C-353-66
• Files: TRIS
• Created Date: Nov 24 1972 12:00AM