The Spiral Coaxial Cable

[摘要] A new concept of metal spiral coaxial cable is introduced. The solution toMaxwell’sequations for the fundamental propagatingTEMeigenmode, using ageneralization of theSchwarz-Christoffelconformal mapping of the spiral transversesection, is provided together with the analysis of the impedances and thePoynting vector of the line. The new cable may find application as a medium fortelecommunication and networking or in the sector of the Microwave Photonics. A spiral plasmonic coaxial cable could be used to propagate subwavelength surfaceplasmon polaritons at optical frequencies. Furthermore, according to the present model, the myelinated nerves can be considered natural examples of spiral coaxial cables. This study suggests that a malformation of the Peters angle, which determines the power of the neural signal in theTEMmode, causes higher/lower power to be transmitted in the neural networkswith respect to the natural level. The formulas of the myelin sheaths thickness, thediameter of the axon, and the spiralgfactor of the lipid bilayers, which are mathematicallyrelated to the impedances of the spiral coaxial line, can make it easier to analyze the neural line impedance mismatches and the signal disconnections typical of the neurodegenerative diseases.

[学科分类] 电子、光学、磁材料