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  1. ncc1701

    Dielectric Constant? of polymers at High Freq,

    So can anybody email or otherwise direct me to a source graph for this material and possibly others? A graph because it can be extrapolated what it might be at a data point beyond the graph limits.
  2. ncc1701

    Grounded CPW

    OK, I made a typo. I have the dielectric constant of the material and all the gometric dimensions, and I want to calculate the impedance. Is that possible with in a limited degree of accuracy? Also, I thought that the vias were to keep from generating higher order modes?
  3. ncc1701

    Grounded CPW

    I am trying to diagnoise a problem with a CPW board and I need to calculate the impedance and dielectric constant. If you know the via sizes, location, the material, (in this case Rogers 4003), and the dimensions; is there a simple way to determine these pieces of information?
  4. ncc1701

    Dielectric Constant? of polymers at High Freq,

    Does anybody know where I might find either charts or data on commonly used polymers in the electronics industry? For example most data sheets only show information to 10 GHz or so. I am looking for data on Ultem, Kel-F, and the like at frequencies 30 GHz to 65 GHz. Can someone please help me!

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