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propagating THz signals in wires with low losses

Discussion in 'Electronic Design' started by Jamie M, Mar 24, 2013.

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  1. Jamie M

    Jamie M Guest

    Hi,

    I was wondering about plasmonic THz and higher frequencies, when they
    propagate in copper the losses are extremely high due to the high
    accelerations of electrons radiating losses. I saw some new info on
    using metamaterials to "reduce electrons mass to near zero" using
    alternate thin layers of material with positive and negative
    permittivity:

    http://www.upenn.edu/pennnews/news/...y-reduce-electrons-effective-mass-nearly-zero

    I was wondering if this is a similar concept to a coax transmission
    line for RF, in that it prevents losses/radiation until the antenna?
    If a stripline transmission line is put on a PCB for THz
    frequencies using the nanometer thick alternate layers from that paper
    would that work to allow longer THz wires with low losses?

    cheers,
    Jamie
     
  2. whit3rd

    whit3rd Guest

    Wires with signals are actually carrying the energy in fields outside
    the wire (in the insulator); high frequency losses have to
    include that insulator, not just the conductor.

    To get to terahertz, one uses a waveguide. The walls of
    the waveguide just have to be reflectors, not perfect conductors
    of electricity.
     
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