ELECTROMAGNETIC FIELDS OF A DIPOLE SOURCE IN A CIRCULAR TUNNEL CONTAINING A SURFACE WAVE LINE

The propagation mode that behaves as an axial surface wave at high frequencies is examined for a frequency range from 1 MHz to 1 GHz. The attenuation reaches a maximum value at frequencies of the order of 100 MHz where the absorption loss by the tunnel wall is most significant. In the range from 1 to about 10 MHz, the attenuation rate is approximately proportional to frequency and is only weakly dependent on the conductivity of the region external to the tunnel walls. The results are consistent with earlier investigations for surface wave lines located over a homogeneous half-space.

• Corporate Authors:

  Taylor & Francis

  4 Park Square, Milton Park
  Abingdon,   United Kingdom  OX14 4RN
• Authors:
  • Wait, J R
  • Hill, D A
• Publication Date: 1977-4

Media Info

• Features: References;
• Pagination: p. 377-391
• Serial:
  • International Journal of Electronics
  • Volume: 42
  • Issue Number: 4
  • Publisher: Taylor & Francis

Subject/Index Terms

• TRT Terms: Communications; Electromagnetic waves; Electromagnetism; High frequency; Railroads; Rayleigh waves; Tunneling; Tunnels; Waveguides
• Old TRIS Terms: Electromagnetic waveguides; Propagation in guides; Tunnels & tunneling
• Subject Areas: Bridges and other structures; Railroads;

Filing Info

• Accession Number: 00167978
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Dec 27 1977 12:00AM