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4 May 2007 Guided-wave propagation on a cylindrical conductor at millimeter-wave or terahertz frequencies
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Abstract
Surface-wave propagation on coated or uncoated conducting wires, rods, or tubes has been shown to provide low attenuation, moderate field extent, low dispersion, and high power-handling at frequencies from 100 GHz to 1 THz. Typical conductors are copper, aluminum, or stainless steel. Uncoated conductors provide the lowest loss, while conductors coated with a thin layer of low-loss dielectric (such as Teflon, polystyrene, or polyethylene) have the smallest field extent. The guided mode is the TM01, often referred to as the Sommerfeld mode. The properties of the guided wave were theoretically analyzed by King and Wiltse in 1962, and measured results were obtained at 105 and 140 GHz. In the last two years the work has been rediscovered, and now four different research groups have reported new results. While the earlier work was conducted in the search for long, low-loss transmission lines (100 meters to 1 kilometer), the current applications are for lengths about 1 meter long, as might be used in probes. The recent results will be summarized, and an optimized design will be presented, along with general curves of attenuation, field extent, and power handling capability from 100 GHz to 1 THz.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
James C. Wiltse "Guided-wave propagation on a cylindrical conductor at millimeter-wave or terahertz frequencies", Proc. SPIE 6549, Terahertz for Military and Security Applications V, 65490G (4 May 2007); https://doi.org/10.1117/12.720110
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